Trouble Codes
"Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth." - Sherlock Holmes

OBDII C Code Definitions

Be sure to double check the codes.
Codes from C0000 to C1000 and C3000 to C4000 are Generic, defined by ISO/SAE.
Codes between C1000 and C3000 are Manufacturer specific and may not match the ones listed here. Check specific manufacturer pages on the site, as some of them, we list the OBD2 codes on those pages for those specific vehicles.

[ U0000-0100 ] [ U0100-0200 ] [ U0200-0300 ] [ U0300-0400 ] [ U0400-1000 ] [ U1000-2000 ] [ U2000-3000 ] [ U3000-4000 ]
[ B0000-1000 ] [ B1000-2000 ] [ B2000-3000 ] [ B3000-4000 ]
[ C0000-1000 ] [ C1000-2000 ] [ C2000-3000 ] [ C3000-4000 ]

C Codes
Trouble Code Fault Location
C0000 – C0999 (Brakes and Traction control)
C0000ISO/SAE Reserved
C0001TCS Control Channel "A" Valve 1 (Subfault)
C0002TCS Control Channel "A" Valve 2 (Subfault)
C0003TCS Control Channel "B" Valve 1 (Subfault)
C0004TCS Control Channel "B" Valve 2 (Subfault)
C0005ISO/SAE Reserved
C0006ISO/SAE Reserved
C0007ISO/SAE Reserved
C0008ISO/SAE Reserved
C0009ISO/SAE Reserved
C000AISO/SAE Reserved
C000BISO/SAE Reserved
C000CISO/SAE Reserved
C000DISO/SAE Reserved
C000EISO/SAE Reserved
C000FISO/SAE Reserved
C0010Left Front Inlet Control (Subfault)
C0011Left Front Outlet Control (Subfault)
C0012Left Front Hydraulic Release Too Long (Subfault)
C0013ISO/SAE Reserved
C0014Right Front Inlet Control (Subfault)
C0015Right Front Outlet Control (Subfault)
C0016Right Front Hydraulic Release Too Long (Subfault)
C0017ISO/SAE Reserved
C0018Left Rear Inlet Control (Subfault)
C0019Left Rear Outlet Control (Subfault)
C001ALeft Rear Hydraulic Release Too Long (Subfault)
C001BISO/SAE Reserved
C001CRight Rear Inlet Control (Subfault)
C001DRight Rear Outlet Control (Subfault)
C001ERight Rear Hydraulic Release Too Long (Subfault)
C001FISO/SAE Reserved
C0020ABS Pump Motor Control (Subfault)
C0021Brake Booster Performance (Subfault)
C0022Brake Booster Solenoid (Subfault)
C0023Stop Lamp Control (Subfault)
C0024ISO/SAE Reserved
C0025ISO/SAE Reserved
C0026ISO/SAE Reserved
C0027ISO/SAE Reserved
C0028ISO/SAE Reserved
C0029ISO/SAE Reserved
C002AISO/SAE Reserved
C002BISO/SAE Reserved
C002CISO/SAE Reserved
C002DISO/SAE Reserved
C002EISO/SAE Reserved
C002FISO/SAE Reserved
C0030Left Front Tone Wheel (Subfault)
C0031Left Front Wheel Speed Sensor (Subfault)
C0032Left Front Wheel Speed Sensor Supply (Subfault)
C0033Right Front Tone Wheel (Subfault)
C0034Right Front Wheel Speed Sensor (Subfault)
C0035Right Front Wheel Speed Sensor Supply (Subfault)
C0036Left Rear Tone Wheel (Subfault)
C0037Left Rear Wheel Speed Sensor (Subfault)
C0038Left Rear Wheel Speed Sensor Supply (Subfault)
C0039Right Rear Tone Wheel (Subfault)
C003ARight Rear Wheel Speed Sensor (Subfault)
C003BRight Rear Wheel Speed Sensor Supply (Subfault)
C003CRear Tone Wheel (Subfault)
C003DRear Wheel Speed Sensor (Subfault)
C003ERear Wheel Speed Sensor Supply (Subfault)
C003FISO/SAE Reserved
C0040Brake Pedal Switch "A" (Subfault)
C0041Brake Pedal Switch "B" (Subfault)
C0042Brake Pedal Position Sensor "Circuit A" (Subfault)
C0043Brake Pedal Position Sensor "Circuit B" (Subfault)
C0044Brake Pressure Sensor "A" (Subfault)
C0045Brake Pressure Sensor "B" (Subfault)
C0046Brake Pressure Sensor "A"/"B" (Subfault)
C0047Brake Booster Pressure Sensor (Subfault)
C0048Brake Booster Travel Sensor (Subfault)
C0049Brake Fluid (Subfault)
C004ABrake Lining Wear Sensor (Subfault)
C004BISO/SAE Reserved
C004CISO/SAE Reserved
C004DISO/SAE Reserved
C004EISO/SAE Reserved
C004FISO/SAE Reserved
C0050ISO/SAE Reserved
C0051Steering Wheel Position Sensor (Subfault)
C0052Steering Wheel Position Sensor "Signal A" (Subfault)
C0053Steering Wheel Position Sensor "Signal B" (Subfault)
C0054Steering Wheel Position Sensor "Signal C" (Subfault)
C0055Steering Wheel Position Sensor "Signal D" (Subfault)
C0056ISO/SAE Reserved
C0057ISO/SAE Reserved
C0058ISO/SAE Reserved
C0059ISO/SAE Reserved
C005AISO/SAE Reserved
C005BISO/SAE Reserved
C005CISO/SAE Reserved
C005DISO/SAE Reserved
C005EISO/SAE Reserved
C005FISO/SAE Reserved
C0060ISO/SAE Reserved
C0061Lateral Acceleration Sensor (Subfault)
C0062Longitudinal Acceleration Sensor (Subfault)
C0063Yaw Rate Sensor (Subfault)
C0064Roll Rate Sensor
C0065ISO/SAE Reserved
C0066ISO/SAE Reserved
C0067ISO/SAE Reserved
C0068ISO/SAE Reserved
C0069Yaw Rate/Longitude Sensors (Subfault)
C006AMulti-axis Acceleration Sensor (Subfault)
C006BStability System Active Too Long (Subfault)
C006CStability System
C006DISO/SAE Reserved
C006EISO/SAE Reserved
C006FISO/SAE Reserved
C0070ISO/SAE Reserved
C00712/4 Wheel Drive Status Input (Subfault)
C0072Brake Temperature Too High (Subfault)
C0073Delivered Driving Torque (Subfault)
C0074Requested Driving Torque (Subfault)
C0075Extended Brake Pedal Travel, output to PCM (Subfault)
C0076PWM for Traction Control (Subfault)
C0077Low Tire Pressure (Subfault)
C0078Tire Diameter (Subfault)
C0079Variable Effort Steering (Subfault)
C007AISO/SAE Reserved
C007BISO/SAE Reserved
C007CISO/SAE Reserved
C007DISO/SAE Reserved
C007EISO/SAE Reserved
C007FISO/SAE Reserved
C0080ISO/SAE Reserved
C0081ABS Malfunction Indicator (Subfault)
C0082Brake System Malfunction Indicator (Subfault)
C0083Tire Pressure Monitor Malfunction Indicator (Subfault)
C0084Traction Active Indicator (Subfault)
C0085Traction Disable Indicator (Subfault)
C0086Vehicle Dynamics Indicator (Subfault)
C0087ISO/SAE Reserved
C0088ISO/SAE Reserved
C0089TCS Disable Switch (Subfault)
C008ATCS Mode Control (Subfault)
C008BISO/SAE Reserved
C1000 – C1999 (Manufacturer defined)
C1000Manufacturer Controlled DTC
C1091Speed Wheel Sensor All Coherency Failure
C1095ABS Hydraulic Pump Motor Circuit Failure
C1096ABS Hydraulic Pump Motor Circuit Open
C1097ABS Hydraulic Pump Motor Circuit Short To Ground
C1098ABS Hydraulic Pump Motor Circuit Short To Battery
C1100ABS Pump Switch Circuit Failure
C1101ABS Hydraulic Valve Circuit Failure
C1102ABS Acceleration Switch Circuit Failure
C1103ABS Hydraulic Brake Switch Circuit Failure
C1104Traction Control Active Lamp – Circuit Short to Battery
C1105Traction Control Disable Lamp – Circuit Short to Battery
C1106Traction Control Disable Switch Circuit Short to Battery
C1107ABS Function Enabled Input Circuit Failure
C1109Speed Control Actuator Assembly Cable Release Failure
C1110ABS Power Relay Coil Circuit Failure
C1111ABS Power Relay Coil Open Circuit
C1112ABS Power Relay Coil Short Circuit To Ground
C1113ABS Power Relay Coil Short Circuit To Battery
C1114ABS Power Relay Output Short Circuit To Ground
C1115ABS Power Relay Output Short Circuit To Battery
C1116Starter Motor Circuit Failure
C1117RPM Input Circuit Failure
C1123Vehicle Speed Sensor Input Short to Battery
C1124Input shaft speed signal missing/faulted
C1125Brake Fluid Level Sensor Input Circuit Failure
C1126Cruise Control Command Switch Assembly Circuit Failure
C1127Cruise Control Deactivator Brake Switch Circuit Failure
C1132Clutch position ckt short to ground
C1133Clutch position ckt short to battery
C1134Gear Shift position short to ground
C1135Gear Shift position short to battery
C1136Gear Select position short to ground
C1137ECU is Defective
C1138Gear Select position short to Battery
C1139Wheel Speed Sensor Center Tone Ring Missing Tooth Fault
C1140Hydraulic Base Brake Failure
C1141Wheel Speed Sensor LF Tone Ring Tooth Missing Fault
C1142Wheel Speed Sensor RF Tone Ring Tooth Missing Fault
C1143Wheel Speed Sensor LR Tone Ring Tooth Missing Fault
C1144Wheel Speed Sensor RR Tone Ring Tooth Missing Fault
C1145Speed Wheel Sensor RF Input Circuit Failure
C1146Speed Wheel Sensor RF Circuit Open
C1148Speed Wheel Sensor RF Coherency Fault
C1149Hydraulic Fluid Pressure/ Flow Circuit Failure
C1150Two Speed Rear Axle Input Switch Circuit Short to Vbatt
C1155Speed Wheel Sensor LF Input Circuit Failure
C1156Speed Wheel Sensor LF Circuit Open
C1157Park Brake Actuator Assembly Switch Applied Circuit Failure
C1158Speed Wheel Sensor LF Coherency Fault
C1159Hydraulic Fluid Pressure/ Flow Circuit Short to Gnd
C1161Air Pressure Low Circuit Short to Gnd
C1162Park Brake Switch # 2 Released Circuit Failure
C1163Park Brake Switch # 2 Applied Circuit Short to Gnd
C1164Park Brake Actuator Assembly Switch Circuit Failure
C1165Speed Wheel Sensor RR Input Circuit Failure
C1166Speed Wheel Sensor RR Input Open Circuit
C1167Park Brake Actuator Assembly Switch Released Circuit Short to Gnd
C1168Speed Wheel Sensor RR Coherency Fault
C1169ABS Fluid Dumping Exceeds Maximum Timing
C1170PRNDL Switch Circuit Failure
C1172Park Brake Switch # 1 Applied Circuit Failure
C1173Park Brake Switch # 1 Released Circuit Short to Gnd
C1174Park Brake Switch # 2 Applied Circuit Failure
C1175Speed Wheel Sensor LR Input Circuit Failure
C1176Speed Wheel Sensor LR Circuit Open
C1177Park Brake Actuator Assembly Switch Released Circuit Failure
C1178Speed Wheel Sensor LR Coherency Fault
C1179Speed Control Actuator Assembly Cable Slack Failure
C1180Park Brake Valve Solenoid #1 Sense Input Circuit Failure
C1181Park Brake Valve Solenoid #1 Sense Input Circuit Short to Gound
C1182Park Lamp Flash Relay Circuit Failure
C1183Park Lamp Flash Relay Circuit Short to Battery
C1184ABS System Is Not Operational
C1185ABS Power Relay Output Circuit Failure
C1186ABS Power Relay Output Open Circuit
C1187Brake Fluid Level Sensor Input Open Circuit
C1188Brake Fluid Level Sensor Input Short Circuit To Battery
C1189Brake Fluid Level Sensor Input Short Circuit To Ground
C1190Speed Wheel Sensor LF Input Short Circuit To Battery
C1191Speed Wheel Sensor LF Input Short Circuit To Ground
C1192Speed Wheel Sensor RF Input Short Circuit To Battery
C1193Speed Wheel Sensor RF Input Short Circuit To Ground
C1194ABS Outlet Valve Coil LF Circuit Failure
C1195ABS Outlet Valve Coil LF Circuit Open
C1196ABS Outlet Valve Coil LF Circuit Short To Battery
C1197ABS Outlet Valve Coil LF Circuit Short To Ground
C1198ABS Inlet Valve Coil LF Circuit Failure
C1199ABS Inlet Valve Coil LF Circuit Open
C1200ABS Inlet Valve Coil LF Circuit Short To Battery
C1201ABS Inlet Valve Coil LF Circuit Short To Ground
C1202ABS Outlet Valve Coil Rear Circuit Failure
C1203ABS Outlet Valve Coil Rear Circuit Open
C1204ABS Outlet Valve Coil Rear Circuit Short To Battery
C1205ABS Outlet Valve Coil Rear Circuit Short To Ground
C1206ABS Inlet Valve Coil Rear Circuit Failure
C1207ABS Inlet Valve Coil Rear Circuit Open
C1208ABS Inlet Valve Coil Rear Circuit Short To Battery
C1209ABS Inlet Valve Coil Rear Circuit Short To Ground
C1210ABS Outlet Valve Coil RF Circuit Failure
C1211ABS Outlet Valve Coil RF Circuit Open
C1212ABS Outlet Valve Coil RF Circuit Short To Battery
C1213ABS Outlet Valve Coil RF Circuit Short To Ground
C1214ABS Inlet Valve Coil RF Circuit Failure
C1215ABS Inlet Valve Coil RF Circuit Open
C1216ABS Inlet Valve Coil RF Circuit Short To Battery
C1217ABS Inlet Valve Coil RF Circuit Short To Ground
C1218Lamp ABS Warning Output Circuit Failure
C1219Lamp ABS Warning Output Circuit Open
C1220Lamp ABS Warning Output Circuit Short To Battery
C1221Lamp ABS Warning Output Circuit Short To Ground
C1222Speed Wheel Mismatch
C1223Lamp Brake Warning Output Circuit Failure
C1224Lamp Brake Warning Output Circuit Open
C1225Lamp Brake Warning Output Circuit Short To Battery
C1226Lamp Brake Warning Output Circuit Short To Ground
C1227Speed Wheel Sensor LR Input Short Circuit To Battery
C1228Speed Wheel Sensor LR Input Short Circuit To Ground
C1229Speed Wheel Sensor Rear Center Coherency Fault
C1230Speed Wheel Sensor Rear Center Input Circuit Failure
C1231Speed Wheel Sensor Rear Center Circuit Open
C1232Speed Wheel Sensor Rear Center Input Short Circuit To Battery
C1233Speed Wheel LF Input Signal Missing
C1234Speed Wheel RF Input Signal Missing
C1235Speed Wheel RR Input Signal Missing
C1236Speed Wheel LR Input Signal Missing
C1237Speed Wheel Rear Input Signal Missing
C1238ABS Hydraulic Pressure Differential Switch Input Circuit Failure
C1239ABS Hydraulic Pressure Differential Switch Input Open Circuit
C1240ABS Hydraulic Pressure Differential Switch Input Short Circuit To Battery
C1241ABS Hydraulic Pressure Differential Switch Input Short Circuit To Ground
C1242ABS Outlet Valve Coil LR Circuit Failure
C1243ABS Outlet Valve Coil LR Circuit Open
C1244ABS Outlet Valve Coil LR Circuit Short To Battery
C1245ABS Outlet Valve Coil LR Circuit Short To Ground
C1246ABS Outlet Valve Coil RR Circuit Failure
C1247ABS Outlet Valve Coil RR Circuit Open
C1248ABS Outlet Valve Coil RR Circuit Short To Battery
C1249ABS Outlet Valve Coil RR Circuit Short To Ground
C1250ABS Inlet Valve Coil LR Circuit Failure
C1251ABS Inlet Valve Coil LR Circuit Open
C1252ABS Inlet Valve Coil LR Circuit Short To Battery
C1253ABS Inlet Valve Coil LR Circuit Short To Ground
C1254ABS Inlet Valve Coil RR Circuit Failure
C1255ABS Inlet Valve Coil RR Circuit Open
C1256ABS Inlet Valve Coil RR Circuit Short To Battery
C1257ABS Inlet Valve Coil RR Circuit Short To Ground
C1258Speed Wheel LF Comparison Failure
C1259Speed Wheel RF Comparison Failure
C1260Speed Wheel RR Comparison Failure
C1261Speed Wheel LR Comparison Failure
C1262Lamp Warning Relay Circuit Failure
C1263Lamp Warning Relay Circuit Open
C1264Lamp Warning Relay Circuit Short To Battery
C1265Lamp Warning Relay Circuit Short To Ground
C1266ABS Valve Power Relay Circuit Failure
C1267ABS Functions Temporarily Disabled
C1268Motor Relay # 1 Circuit Failure
C1269Motor Relay # 1 Circuit Short to Battery
C1270Motor # 1 Input Circuit Failure
C1271Motor # 1 Input Circuit Short to Gnd
C1272Motor # 2 Input Circuit Failure
C1273Motor # 2 Input Circuit Short to Vbat
C1274Solenoid Relay # 1 Circuit Failure
C1275Solenoid Relay # 1 Circuit Short to Vbatt
C1276Park Brake Actuator Assembly Switch Applied Circuit Short to Gnd
C1277STEERING Wheel Angle 1and 2 Circuit Failure
C1278STEERING Wheel Angle 1and 2 Signal Faulted
C1279Yaw Rate Sensor circuit Failure
C1280Yaw Rate Sensor Signal Fault
C1281Lateral Accelerometer circuit Failure
C1282Lateral Accelerometer Signal Fault
C1283Switch Test Signal Failure
C1284Oil Pressure Switch Failure
C1285Booster Solenoid circuit Failure
C1286Booster Mechanical Failure
C1287Booster Pedal Force switch circuit Failure
C1288Pressure Transducer Main / Primary Input Circuit Failure
C1289Pressure Transducer Redundant / Secondary Input Circuit Failure
C1400Traction Control Valve RF Circuit Failure
C1401Traction Control Valve RF Circuit Open
C1402Traction Control Valve RF Circuit Short To Ground
C1403Traction Control Valve RF Circuit Short To Battery
C1404Traction Control Valve Rear Circuit Failure
C1405Traction Control Valve Rear Circuit Open
C1406Traction Control Valve Rear Circuit Short To Ground
C1407Traction Control Valve Rear Circuit Short To Battery
C1410Traction Control Valve LF Circuit Failure
C1411Traction Control Valve LF Circuit Open
C1412Traction Control Valve LF Circuit Short To Ground
C1413Traction Control Valve LF Circuit Short To Battery
C1414Incorrect Module Design Level
C1415Incorrect Module Configuration
C1416Damper RF Circuit Short To Battery
C1417Damper RF Circuit Short to Ground
C1418Damper RF Circuit Failure
C1419Damper RF Circuit Open
C1420Hydraulic Fluid Pressure/ Flow Circuit Short to Vbatt
C1421Damper LF Circuit Short To Battery
C1422Damper LF Circuit Short to Ground
C1423Damper LF Circuit Failure
C1424Damper LF Circuit Open
C1425Damper RR Circuit Short to Ground
C1426Damper RR Circuit Short To Battery
C1427Damper RR Circuit Open
C1428Damper RR Circuit Failure
C1429Input-shaft-speed input circuit failure
C1430Damper LR Circuit Open
C1431Damper LR Circuit Short To Battery
C1432Damper LR Circuit Short to Ground
C1433Damper LR Circuit Failure
C1435Accelerometer Rear Circuit Failure
C1436Accelerometer Rear Circuit Signal Is Not Sensed
C1437Accelerometer Rear Circuit Short To Ground
C1438Accelerometer Rear Circuit Short To Battery
C1439Vehicle Acceleration EEC-IV Circuit Failure
C1440Pressure Transducer Main / Primary signal Faulted
C1441Steering Phase A Circuit Signal Is Not Sensed
C1442Steering Phase B Circuit Signal Is Not Sensed
C1443Steering Phase A Circuit Short To Ground
C1444Steering Phase B Circuit Short To Ground
C1445Speed Vehicle Signal Circuit Failure
C1446Brake Switch Circuit Failure
C1447Traction Control Module Request Circuit Failure
C1448Lamp Adaptive Damping Warning Circuit Failure
C1449Traction Control Motor Coherency Fault
C1450Traction Control Motor Circuit Failure
C1451Traction Control Motor Circuit Open
C1452Traction Control Motor Circuit Short to Battery
C1453Traction Control Motor Circuit Short to Ground
C1454Front Lateral Accelerometer Circuit Failure
C1455Accelerometer Front Circuit Failure
C1456Accelerometer Front Circuit Is Not Sensed
C1457Accelerometer Front Circuit Short To Ground
C1458Accelerometer Front Circuit Short To Battery
C1459Adaptive Mode Switch Circuit Failure
C1460Vehicle Accelerometer Power Circuit Failure
C1461Vehicle Accelerometer Power Circuit Short to Battery
C1462Left Front Vertical Accelerometer Circuit Failure
C1463Right Front Vertical Accelerometer Circuit Failure
C1464Pressure Transducer Redundant / Secondary Signal Faulted
C1465Damper High Side Front Circuit Short To Battery
C1466Damper Circuit Failure
C1467Damper High Side Rear Circuit Short To Battery
C1468Damper Low Side Front Circuit Failure
C1469Damper Low Side Rear Circuit Failure
C1495Traction Control Motor Potentiometer Circuit Failure
C1496Traction Control Motor Potentiometer Circuit Open
C1497Traction Control Motor Potentiometer Circuit Short to Battery
C1498Traction Control Motor Potentiometer Circuit Short to Ground
C1499Transfer Case Contact Plate "A" Encoder Circuit Failure
C1500Transfer Case Contact Plate "B" Encoder Circuit Failure
C1501Transfer Case Contact Plate "C" Encoder Circuit Failure
C1502Transfer Case Contact Plate "D" Encoder Circuit Failure
C1503Dynamic Stability Control Left Front Valve Malfunction
C1504Dynamic Stability Control Right Front Valve Malfunction
C1505Dynamic Stability Control Left Rear Valve Malfunction
C1506Dynamic Stability Control Right Rear Valve Malfunction
C1507Traction Control of Brake Exceeds Time-Out
C1508Traction Control of Engine Exceeds Time-Out
C1510Right Front Wheel Pressure Reduction Performance Problem
C1511Left Front Wheel Pressure Reduction Performance Problem
C1512Right Rear Wheel Pressure Reduction Performance Problem
C1513Left rear Wheel Pressure Reduction Performance Problem
C1699Left Rear Sensor Circuit Short to Vbat
C1700Left Rear Sensor Circuit Failure
C1701Left Rear Sensor Circuit Fault
C1702RightRear Sensor Circuit Short to Vbat
C1703Right Rear Sensor Circuit Failure
C1704Right Rear Sensor Circuit Fault
C1705Left Rear Center Sensor Circuit Short to Vbat
C1706Left Rear Center Sensor Circuit Failure
C1707Left Rear Center Sensor Circuit Fault
C1708Right Rear Center Sensor Circuit Short to Vbat
C1709Right Rear Center Sensor Circuit Failure
C1710Right Rear Center Sensor Circuit Fault
C1711Left Front Sensor Circuit Short to Vbat
C1712Left Front Sensor Circuit Failure
C1713Left Front Sensor Circuit Fault
C1714Right Front Sensor Circuit Short to Vbat
C1715Right Front Sensor Circuit Failure
C1716Right Front Sensor Circuit Fault
C1717Left Front Center Sensor Circuit Short to Vbat
C1718Left Front Center Sensor Circuit Failure
C1719Left Front Center Sensor Circuit Fault
C1721Air Suspension Height Sensor Power Circuit Open
C1722Air Suspension Height Sensor Power Circuit Short To Battery
C1723Air Suspension Height Sensor Power Circuit Short To Ground
C1724Air Suspension Height Sensor Power Circuit Failure
C1725Air Suspension Front Pneumatic Failure
C1726Air Suspension Rear Pneumatic Failure
C1727Air Suspension Reservoir Pneumatic Failure
C1728Transfer Case unable to transition between 2H and 4H
C1729Transfer Case unable to transition between 4H and 4L
C1730Reference Voltage Out of Range (+5 v)
C1731Air Suspension LF Corner Up Timeout
C1732Air Suspension LF Corner Down Timeout
C1733Air Suspension RF Corner Up Timeout
C1734Air Suspension RF Corner Down Timeout
C1735Air Suspension LR Corner Up Timeout
C1736Air Suspension LR Corner Down Timeout
C1737Air Suspension RR Corner Up Timeout
C1738Air Suspension RR Corner Down Timeout
C1739Right Front Center Sensor Circuit Short to Vbat
C1740Right Front Center Sensor Circuit Failure
C1741Right Front Center Sensor Circuit Fault
C1742Rear Sounder Circuit Failure
C1743Rear Sounder Circuit Short to Vbatt
C1744Front Sounder Circuit Failure
C1745Front Sounder Circuit Short to Vbatt
C1748Switch input Circuit Short to Gnd
C1749Trailer Input Circuit Failure
C1750Accelerator Position Sensor Out of Range
C1751Vehicle Speed Sensor # 1 Output Circuit Short to Vbatt
C1752Vehicle Speed Sensor # 1 Output Circuit Short to Gnd
C1753Hydraulic Clutch Actuator Valve Signal Fault
C1754Hydraulic Clutch Actuator Valve Circuit Failure
C1755Power Limit Shutdown Fault
C1756Air Suspension Front Height Sensor High (SE) Signal Circuit Failure
C1757Air Suspension Front Height Sensor High (SE) Signal Circuit Open
C1758Air Suspension Front Height Sensor High (SE) Signal Circuit Short To Battery
C1759Air Suspension Front Height Sensor High (SE) Signal Circuit Short To Ground
C1760Air Suspension Rear Height Sensor High (SE) Signal Circuit Failure
C1761Air Suspension Rear Height Sensor High (SE) Signal Circuit Open
C1762Air Suspension Rear Height Sensor High (SE) Signal Circuit Short To Battery
C1763Air Suspension Rear Height Sensor High (SE) Signal Circuit Short To Ground
C1765Air Suspension Rear Height Sensor Low Signal Circuit Failure
C1766Air Suspension Rear Height Sensor Low Signal Circuit Open
C1767Air Suspension Rear Height Sensor Low Signal Circuit Short To Battery
C1768Air Suspension Rear Height Sensor Low Signal Circuit Short To Ground
C1770Air Suspension Vent Solenoid Output Circuit Failure
C1771Air Suspension Vent Solenoid Output Circuit Open
C1772Air Suspension Vent Solenoid Output Circuit Short To Battery
C1773Air Suspension Vent Solenoid Output Circuit Short To Ground
C1774Coolant Temp Out of Range
C1775DC-DC Converter Failure
C1776Heater System Failure
C1777Vacuum Pressure Circuit Failure
C1778Power Steering Failure
C1779Blower Switch Failure
C1780Temperature Select Failure
C1781Engine Coolant Temperature Signal Missing/Fault
C1790Air Suspension LR Air Spring/Shock Solenoid Output Circuit Failure
C1791Air Suspension LR Air Spring/Shock Solenoid Output Circuit Open
C1792Air Suspension LR Air Spring/Shock Solenoid Output Circuit Short To Battery
C1793Air Suspension LR Air Spring/Shock Solenoid Output Circuit Short To Ground
C1795Air Suspension RR Air Spring/Shock Solenoid Output Circuit Failure
C1796Air Suspension RR Air Spring/Shock Solenoid Output Circuit Open
C1797Air Suspension RR Air Spring/Shock Solenoid Output Circuit Short To Battery
C1798Air Suspension RR Air Spring/Shock Solenoid Output Circuit Short To Ground
C1800Air Suspension Reservoir Solenoid Circuit Failure
C1805Mismatched PCM and/or ABS-TC Module
C1813Air Suspension LR Vent Request Exceeded Max Timing
C1814Air Suspension RR Vent Request Exceeded Max Timing
C1818Air Suspension LR Air Compress Request Exceeded Max Timing
C1819Air Suspension RR Air Compress Request Exceeded Max Timing
C1820Air Suspension RF Air Compress Request Exceeded Max Timing
C1830Air Suspension Compressor Relay Circuit Failure
C1831Air Suspension Compressor Relay Circuit Open
C1832Air Suspension Compressor Relay Circuit Short To Battery
C1833Air Suspension Compressor Relay Circuit Short To Ground
C1834Gauge Drive Current Fault
C1835Current Sense Circuit Failure
C1836Battery Temp out of Range
C1837Battery Heater Circuit Failure
C1838Charging System Fault
C1839Leakage Fault
C1840Air Suspension Disable Switch Circuit Failure
C1841Air Suspension Disable Switch Circuit Open
C1842Air Suspension Disable Switch Circuit Short To Battery
C1843Air Suspension Disable Switch Circuit Short To Ground
C1844Air Suspension Secondary Front Inflator Solenoid Output Circuit Failure
C1845Air Suspension Front Inflator Solenoid Output Circuit Failure
C1846Air Suspension Front Inflator Solenoid Output Circuit Open
C1847Air Suspension Front Inflator Solenoid Output Circuit Short To Battery
C1848Air Suspension Front Inflator Solenoid Output Circuit Short To Ground
C1849Master Cylinder Pressure Out of Range
C1850Air Suspension Warning Lamp Circuit Failure
C1851Air Suspension Warning Lamp Circuit Open
C1852Air Suspension Warning Lamp Circuit Short To Battery
C1853Air Suspension Warning Lamp Circuit Short To Ground
C1854Motor Temperature Out of Range
C1855Acceleration Position Sensor Conflict
C1856Traction Motor Encoder circuit Failure
C1859PRNDL Input #2 Circuit Failure
C1860PRNDL Input #3 Circuit Failure
C1861PRNDL Input #4 Circuit Failure
C1862Contactor Circuit Failure
C1863External Charging Fault
C1864Battery Module Fault
C1865Air Suspension Rear Inflator Solenoid Output Circuit Failure
C1866Air Suspension Rear Inflator Solenoid Output Circuit Open
C1867Air Suspension Rear Inflator Solenoid Output Circuit Short To Battery
C1868Air Suspension Rear Inflator Solenoid Output Circuit Short To Ground
C1869Air Suspension Gate Solenoid Output Circuit Failure
C1870Air Suspension Gate Solenoid Output Circuit Open
C1871Air Suspension Gate Solenoid Output Circuit Short To Battery
C1872Air Suspension Gate Solenoid Output Circuit Short To Ground
C1873Air Suspension RF Air Spring Solenoid Output Circuit Failure
C1874Air Suspension RF Air Spring Solenoid Output Circuit Open
C1875Air Suspension RF Air Spring Solenoid Output Circuit Short To Battery
C1876Air Suspension RF Air Spring Solenoid Output Circuit Short To Ground
C1877Air Suspension LF Air Spring Solenoid Output Circuit Failure
C1878Air Suspension LF Air Spring Solenoid Output Circuit Open
C1879Air Suspension LF Air Spring Solenoid Output Circuit Short To Battery
C1880Air Suspension LF Air Spring Solenoid Output Circuit Short To Ground
C1881Air Suspension RF Height Sensor Circuit Failure
C1882Air Suspension RF Height Sensor Circuit Open
C1883Air Suspension RF Height Sensor Circuit Short To Battery
C1884Air Suspension RF Height Sensor Circuit Short To Ground
C1885Air Suspension RR Height Sensor Circuit Failure
C1886Air Suspension RR Height Sensor Circuit Open
C1887Air Suspension RR Height Sensor Circuit Short To Battery
C1888Air Suspension RR Height Sensor Circuit Short To Ground
C1889Air Suspension LF Height Sensor Circuit Failure
C1890Air Suspension LF Height Sensor Circuit Open
C1891Air Suspension LF Height Sensor Circuit Short To Battery
C1892Air Suspension LF Height Sensor Circuit Short To Ground
C1893Air Suspension LR Height Sensor Circuit Failure
C1894Air Suspension LR Height Sensor Circuit Open
C1895Air Suspension LR Height Sensor Circuit Short To Battery
C1896Air Suspension LR Height Sensor Circuit Short To Ground
C1897Steering VAPS II Circuit Loop Failure
C1898Steering VAPS II Circuit Loop Open
C1899Steering VAPS II Circuit Loop Short To Battery
C1900Steering VAPS II Circuit Loop Short To Ground
C1901Ride Control RR Shock Actuator Circuit Failure
C1902Ride Control RR Shock Actuator Circuit Open
C1903Ride Control RR Shock Actuator Circuit Short To Battery
C1904Ride Control RR Shock Actuator Circuit Short To Ground
C1905Ride Control LR Shock Actuator Circuit Failure
C1906Ride Control LR Shock Actuator Circuit Open
C1907Ride Control LR Shock Actuator Circuit Short To Battery
C1908Ride Control LR Shock Actuator Circuit Short To Ground
C1909Ride Control RF Shock Actuator Circuit Failure
C1910Ride Control RF Shock Actuator Circuit Open
C1911Ride Control RF Shock Actuator Circuit Short To Battery
C1912Ride Control RF Shock Actuator Circuit Short To Ground
C1913Ride Control LF Shock Actuator Circuit Failure
C1914Ride Control LF Shock Actuator Circuit Open
C1915Ride Control LF Shock Actuator Circuit Short To Battery
C1916Ride Control LF Shock Actuator Circuit Short To Ground
C1917Steering EVO Out-of-Range Fault
C1918Air Suspension Ride Height Select Switch Circuit Failure
C1920Led #1 Circuit Failure
C1921VAPS Solenoid Actuator Output Circuit Failure
C1922VAPS Solenoid Actuator Output Circuit Open
C1923VAPS Solenoid Actuator Output Circuit Short To Battery
C1924VAPS Solenoid Actuator Output Circuit Short To Ground
C1925VAPS Solenoid Actuator Return Circuit Failure
C1926VAPS Solenoid Actuator Return Circuit Open
C1927VAPS Solenoid Actuator Return Circuit Short To Battery
C1928VAPS Solenoid Actuator Return Circuit Short To Ground
C1929Air Suspension Front Compressor Relay Circuit Failure
C1930Air Suspension Front Compressor Relay Circuit Open
C1931Air Suspension Front Compressor Relay Circuit Short To Battery
C1932Air Suspension Front Compressor Relay Circuit Short To Ground
C1933Solenoid Current Out Of Range
C1934HPU (Hydraulic Pump Unit) Pressurisation Failure
C1935Chime Circuit Failure
C1936Hydraulic Pump Relay Circuit Failure
C1937Steering Wheel Angle Sensor Offset Failure
C1938Invalid Steering Wheel Angle Sensor ID
C1939Brake Pressure Switch Input Circuit Failure
C1940Brake Pressure Switch Mechanical Failure
C1942Unrecognized Powertrain Configuration
C1943Airbag Deployment Indication Input Fault
C1944Gauge Driver Circuit Fault
C1945Park Switch Indicates Park with Vehicle Moving
C1946Seat Track Position Switch Circuit Open
C1947Seat Track Position Switch Circuit Short to Ground
C1948Seat Track Position Switch Circuit Resistance Out of Range
C1949Accelerometer Sensor Circuit Open
C1950Accelerometer Sensor Circuit Failure
C1951Lateral Accelerometer Sensor Circuit Open
C1952Yaw Rate Sensor Circuit Open
C1953Master Cylinder Pressure Sensor Circuit Open
C1954Master Cylinder Pressure Sensor Circuit Failure
C1955Steering Angle Sensor Circuit Open
C1956Steering Angle Sensor Circuit Failure
C1957Dynamic Stability Control Valve RF Circuit Failure
C1958Dynamic Stability Control Valve LF Circuit Failure
C1959Lateral Accelerometer Sensor Circuit Failure
C1960Driver Brake Apply Circuit Fault
C1961Park Lamp Relay Coil Circuit Failure
C1962Park Lamp Relay Coil Short to Battery
C1963Stability Control Inhibit Warning
C2000 – C2999 (Manufacturer defined)
C2000ISO/SAE Reserved
C2767Reserved – TBD
C3000 – C3999 (ISO/SAE reserved)
C3000ISO/SAE Reserved

Thanks to D.Andrews for his help.