OBDII Jeep Code Definitions.

Be sure to double check the codes. Anything P1000 to P1999 or P3000 to P3400 will be 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.

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Jeep Codes
Trouble CodeFault LocationProbable Cause
P0455EVAP System Large Leak
P1000 – P1099 (Fuel and air metering and auxiliary emission control)
P1001Ignition Key Off Timer Performance Too Fast
P1002Ignition Key Off Timer Performance Too Slow
P1004Short Runner Valve Control Performance
P1005Manifold Tunning Valve Control Performance
P1011Fuel Pump Delivery Pressure Too Low
P1012Fuel Pump Delivery Pressure Too High
P1100 – P1199 (Fuel and air metering)
P1101Airbag Control Module Signal Received
P1102Viscous/Cabin Heater Relay Circuit Condition
P1107BARO Solenoid Performance
P1110Decreased engine performance -high intake air temperatureWiring open circuit/short to positive, ground wire defective, IAT sensor, ECT sensor, cooling system, high engine bay temperature, ECM
P1112Intake Air Temperature Sensor Circuit Intermittent Low Voltage
P1115Engine coolant temperature (ECT) sensor/intake air temperature (IAT) sensor signal variationWiring, ECT sensor, IAT sensor, ECM
P1128Closed loop fuel control not achieved -bank 1Wiring, H02S, fuel system, MAP sensor, ECM
P1129Closed loop fuel control not achieved -bank 2Wiring, H02S, fuel system, MAP sensor, ECM
P1140Vacuum Reservoir Solenoid Circuit Condition
P1142Fuel Pressure Solenoid Circuit Condition
P1143Fuel Rail Pressure Malfunction Positive Pressure Deviation
P1144Fuel Rail Pressure Malfunction Positive Volume Deviation
P1148Fuel Rail Pressure Malfunction Pressure Drop In Over-run
P1151Fuel Rail Pressure Malfunction Maximum Positive Deviation
P1152Fuel Rail Pressure Malfunction Positive Deviation Fuel Pressure Solenoid Setpoint
P1153Fuel Rail Pressure Malfunction Negative Deviation Fuel Pressure Solenoid Setpoint
P1154Fuel Rail Pressure Malfunction Rail Pressure Is Too Low
P1155Fuel Rail Pressure Malfunction Rail Pressure Is Too High
P1159Improper Start Attempt
P1160Ignition Voltage
P1167Capacitor Voltage 1
P1169ECM A/D Converter Error
P1187Throttle Inlet Pressure/MAP Correlation
P1188Throttle Inlet Pressure Sensor Performance
P1189Throttle Inlet Pressure Sensor Low
P1190Throttle Inlet Pressure Sensor High
P1192Intake air temperature (IAT) sensor -voltage lowWiring, IAT sensor, ECM
P1193Intake air temperature (IAT) sensor -voltage highWiring, IAT sensor, ECM
P1194Heated oxygen sensor (H02S), heater control -circuit malfunctionWiring, H02S, ECM
P1195Heated oxygen sensor (H02S) 1, bank 1 slow responseWiring, heating inoperative, exhaust leak, H02S
P1196Heated oxygen sensor (H02S) 1, bank 2 slow responseWiring, heating inoperative, exhaust leak, H02S
P1197Heated oxygen sensor (H02S) 2, bank 1 slow responseWiring, heating inoperative, exhaust leak, H02S
P1200 – P1299 (Fuel and air metering – injector circuit)
P1222Pedal Position Sensor 1 CKT Plausibility
P1234Pedal Position Sensor 2 CKT Plausibility
P1239Engine Oil Temperature Too Low
P1250Vacuum Reservoir Solenoid Open Circuit
P1251Vacuum Reservoir Solenoid Short To Ground
P1252Vacuum Reservoir Solenoid Short Circuit
P1260Glow Plug #1 Circuit
P1261Glow Plug #1 Control Circuit Low
P1262Glow Plug #2 Circuit
P1263Glow Plug #2 Control Circuit Low
P1264Glow Plug #3 Circuit
P1265Glow Plug #3 Control Circuit Low
P1266Glow Plug #4 Circuit
P1267Glow Plug #4 Control Circuit Low
P1270Intake manifold air control -performanceWiring, intake manifold air control actuator, ECM
P1272A/C Clutch Control Circuit 2 Low
P1273AlC compressor clutch control circuit 2 (PCM) circuit highWiring, AlC compressor clutch, PCM
P1274A/C Clutch Control Circuit 2 Open
P1275AlC compressor clutch control circuit 2 (PCM) over-currentWiring, AlC compressor clutch, poor connection, PCM
P1277Starter control circuit 2 (PCM) -short circuit to groundWiring, starter motor, PCM
P1278Starter control circuit 2 (PCM) -short circuit to positiveWiring, starter motor, PCM
P1279Starter control circuit 2 (PCM) -open circuitWiring, starter motor, PCM
P127AStarter control circuit 2 (PCM) over-currentWiring, poor connection, starter motor, PCM
P127CFuel pump control circuit 2 (PCM) -short circuit to groundWiring, fuel pump, PCM
P127DFuel pump control circuit 2 (PCM) -short circuit topowerWiring, fuel pump, PCM
P127EFuel pump control circuit 2 (PCM) -open circuitWiring, fuel pump, PCM
P127FFuel pump control circuit 2 (PCM) over-currentWiring, poor connection, fuel pump, PCM
P1280Fuel pump relay -circuit malfunctionWiring, fuel pump relay
P1281Engine temperature -low for long periodWiring, cooling system, coolant thermostat, ECTsensor
P1282Fuel pump relay -wiring open/short circuitWiring, fuel pump relay
P1288Intake manifold air control solenoid (short runner) -wiring open/short circuitWiring, intake manifold air control solenoid (short runner)
P1289Intake manifold air control solenoid -wiring open/short circuitWiring, intake manifold air control solenoid
P1294Idle speed control (ISC) system -rpm lower/higher than expectedWiring, air leak, throttle valve tight/sticking, lAC valve
P1295Throttle position (TP) sensor -no 5 volt supplyWiring, TP sensor, ECM
P1296Manifold absolute pressure (MAP) sensor no 5 volt supplyWiring, MAP sensor, ECM
P1297Manifold absolute pressure (MAP) sensorWiring, hose connection(s), MAP sensor
P1298System too lean -at prolonged wide open throttleIntake/exhaust leak, MAP sensor, fuel pressure/pump, injector(s), H02S
P1299Manifold absolute pressure (MAP) sensor/throttle position (TP) sensorIntake leak, hose connection(s), MAP sensor, TP sensor
P1300 – P1399 (Ignition system or misfire)
P1386Knock Sensor System Failure
P1388Engine control relay -wiring open/short circuitWiring, engine control relay
P1389Engine control relay -wiring open circuitWiring, engine control relay
P1390Crankshaft position (CKP) sensor/camshaft position (CMP) sensor -signal synchronisationTiming belt loose/jumped position, CKP sensor, CMP sensor
P1391Crankshaft position (CKP) sensor/camshaft position (CMP) sensor -intermittent signalWiring, poor connection, air gap, CKP sensor, CMP sensor
P1398Engine control module (ECM) -misfire detection limit reachedWiring, poor connection, CKP sensor
P1400 – P1499 (Emission control)
P1400Manifold Differential Pressure sensor condition
P1403Exhaust gas recirculation (EGR) valve position sensor no 5 volt supplyWiring, ECM
P1404Exhaust gas recirculation (EGR) valve position sensor malfunctionWiring, exhaust gas recirculation (EGR) valve,ECM
P1411Cylinder cut-out solenoid 1 -malfunctionWiring, cylinder cut-out solenoid, oil pressure, ECM
P1414Cylinder cut-out solenoid 4 -malfunctionWiring, cylinder cut-out solenoid, oil pressure,ECM
P1416Cylindercut-out solenoid 6 malfunctionWiring, cylinder cut-out solenoid, oil pressure, ECM
P1417Cylinder cut-out solenoid 7 malfunctionWiring, cylinder cut-out solenoid, oil pressure, ECM
P1451Diesel particulate filter (DPF) -performanceWiring, exhaust, DPF pressure differential sensor,DPF, hose
P1452Diesel particulate filter (DPF) pressure differential sensor hose performanceWiring, exhaust, DPF pressure differential sensor,DPF, hose
P1453Diesel particulate filter (DPF) pressure differential sensor -hose blockedWiring, exhaust, DPF pressure differential sensor,DPF, hose
P1454Diesel particulate filter (DPF) pressure differential sensor -flow too highWiring, exhaust, DPF pressure differential sensor, DPF, hose
P1475Engine control module (ECM) -auxiliary 5 voltoutput highWiring, ECM
P1476Secondary air injection (AIR) system -insufficientflow detectedAIR pump, AIR valve, AIR hose(s)
P1477Secondary air injection (AIR) system -excessive flow detectedAIR pump, AIR valve, AIR hose(s), ECM
P1480Positive crankcase ventilation (PCV) solenoid -wiring open/short circuitWiring, PCV solenoid
P1481Transmission control module (TCM) -misfire detectionWiring, poor connection, CKP sensor, TCM
P1482Catalytic converter temperature sensor -low inputWiring short circuit to ground, catalytic converter temperature sensor, ECM
P1483Catalytic converter temperature sensor, high input -wiring short circuit to positiveWiring, catalytic converter temperature sensor, ECM
P1484Catalytic converter -overheatingWiring, engine misfire, catalytic converter, catalytic converter temperature sensor
P1485Secondary air injection (AIR) solenoid -circuit malfunctionWiring, AIR solenoid, ECM
P1486Evaporative emission (EVAP) system blockage detectedHose connection(s), hose blocked/trapped, EVAP canister
P1487Engine coolant blower motor relay, high speed -wiring open/short circuitWiring, engine coolant blower motor relay (high speed)
P1488Engine control module (ECM) -auxiliary 5 volt output lowWiring, ECM
P1489AlC condenser blower motor relay, high speed -wiring open/short circuitWiring, engine coolant blower motor relay (high speed)
P1490Engine coolant blower motor relay, low speed -wiring open/short circuitWiring, engine coolant blower motor relay (low speed)
P1491Engine coolant blower motor relay open/shortcircuitWiring, engine coolant blower motor
P1492Ambient/battery temperature sensor -voltage highWiring, ambient/battery temperature sensor
P1493Ambient/battery temperature sensor -voltage lowWiring, ambient/battery temperature sensor
P1494Evaporative emission (EVAP) leak detectionpump -pressure switchWiring, hose leak/blockage, EVAP leak detection pump
P1495Evaporative emission (EVAP) leak detection pump solenoid -wiring open/short circuitWiring, hose leak/blockage, EVAP leak detection pump solenoid
P1496Engine control module (ECM) -5 volt output lowECM
P1498Engine coolant blower motor relay, high speed 3 -wiring open/short circuitWiring, engine coolant blower motor relay (highspeed 3)
P1499Engine coolant blower coupling solenoid -wiring open/short circuitWiring, engine coolant blower coupling solenoid
P1500 – P1599 (Vehicle or idle speed control)
P1500Alternator Terminal Circuit Conditions
P1501Vehicle over-speed condition -rear axle speed greater than front axleWiring, VSS, mechanical fault, ECM
P1502Vehicle over-speed condition -front axle speed greater than rear axleWiring, VSS, mechanical fault, ECM
P1513Starter request circuit -switch stuckWiring short to voltage, ECM
P1521Engine oil sensor module -malfunctionWiring, connectors, oil quality, oil level
P1524Oil Pressure Out Of Range Camshaft Advance / Retard Disable
P1572Brake pedal position (BPP) switch -circuit malfunctionBPP switch adjustment, wiring, BPP switch
P1573Brake pedal position (BPP) switch -circuit malfunctionBPP switch adjustment, wiring, BPP switch
P1593Cruise control system, multi-function input A circuit stuckWiring, poor connection, multi-function switch, mechanical fault, ECM
P1594Alternator -voltage highWiring, battery, alternator
P1595Cruise control -wiring open/short circuitWiring, hoses, cruise control master switch, cruisecontrol vacuum switching valve
P1596Cruise control master switch -high voltageWiring, cruise control master switch
P1597Cruise control master switch -low voltageWiring, cruise control master switch
P1598AlC refrigerant pressure sensor -high inputWiring, AlC refrigerant pressure too high (coolingfault/incorrectly charged), AlC refrigerant pressure sensor
P1599AlC refrigerant pressure sensor -low inputWiring, AlC refrigerant pressure too low(incorrectly charged), AlC refrigerant pressure sensor
P1600 – P1699 (ECM – computer output circuit)
P1602Engine control module (ECM) not programmedNew ECM not programmed, incorrectly programmed, ECM
P1603Engine control module (ECM) -malfunctionWiring, fuse(s), ECM
P1604Engine control module (ECM) -RAM read/writeerrorECM
P1607Engine control module (ECM) -shut down timer errorECM
P1618Engine control module (ECM) -primary 5 volt output erraticWiring, poor connection, oil pressure sensor, APP sensor, CKP sensor, throttle control unit, TPS sensor, ECM
P1628Engine control module (ECM) -auxiliary 5 volt output erraticWiring, poor connection, APP sensor, CMP sensor,EGR solenoid, EGR valve position sensor, MAP sensor, ECM
P1631TCM Internal Processor Clock Performance
P1639TCM Internal CAN 2 RAM Performance
P1646Engine coolant hydraulic blower motor solenoid/circuit high -circuit malfunctionWiring, fuse, engine coolant hydraulic blower motorsolenoid, ECM
P1647Engine coolant hydraulic blower motorsolenoid/circuit low -circuit malfunctionWiring, fuse, engine coolant hydraulic blower motor solenoid, ECM
P1648Glow plug control module/supply circuit circuit malfunctionWiring, fuse, ECM
P1649Glow plug control module/supply circuit circuit malfunctionWiring, fuse, ECM
P1652Data bus, engine control module (ECM)/transmission control module (TCM) -no communicationWiring, CAN data bus, ECMITCM
P1680Clutch pedal position (CPP) switch -circuit malfunctionWiring, CPP switch, ECM
P1681CAN data bus, instrumentation -no signalWiring, instrumentation control module
P1682Alternator -voltage lowWiring, battery, alternator drive belt, alternator
P1683Cruise controlWiring, cruise control vacuum switching valve
P1684Engine control module (ECM) -supply voltage disconnected within last 50 ignition switch ON-OFF cyclesWiring, battery
P1685Key not programmed into immobilizer control moduleWiring, ignition key not matched/damaged, immobilizer control module
P1686CAN data bus, immobilizer control module no signalWiring, immobilizer control module
P1687CAN data bus, instrumentation -no signalWiring, instrumentation control module (mechanical)
P1688Internal Fuel Injection Pump Controller Failure
P1689No Communication Between ECM and Injection Pump Module Data
P1690Fuel Injection Pump CKP Sensor Does Not Agree With ECM CKP Sensor
P1692Fault detected in engine control module (ECM)Companion trouble code detected in ECM
P1693Fault detected in companion engine control module (ECM)Companion trouble code detected in ECM
P1694CAN data bus, ECM -no signalWiring, ECM
P1695CAN data bus, BCM -no signalWiring, SCM
P1696Engine control module (ECM) -EEPROM errorECM
P1697Engine control module (ECM) -EEPROM errorECM
P1698CAN data bus, TCM -no signalWiring, TCM
P1699CAN data bus, AlC control module -no signalWiring, AlC control module
P1700 – P1799 (Transmission)
P1715Restricted port in T3 rangeOther trouble code(s) stored, transmission fluid level, transmission shift linkage adjustment D
P1719Skip shift solenoid -wiring open/short circuitWiring, skip shift solenoid
P1736Transmission -gear/input speed/output speed ratioerrorTransmission fluid level, wiring, input shaft speed (ISS) sensor, output shaft speed (055) sensor, transmission mechanical fault
P1740Torque converter clutch (Tee)/overdrive solenoid -performance problemTCC, overdrive solenoid, transmission mechanical fault
P1745Line Pressure Too High For Too Long
P1756Governor pressure not equal to target (15-20 PSI)-mid pressure malfunctionSignal wire open/short circuit, valve body, sensor supply wire open circuit, transmission fluid level, governor pressure solenoid, transmission mechanical fault, ECM -no 5 volt supply
P1757Govemor pressure not equal to target (15-20 PSI) -zero pressure malfunctionSignal wire open/short circuit, valve body, sensor supply wire open circuit, transmission fluid level, governor pressure solenoid, transmission mechanical fault, ECM -no 5 volt supply
P1762Govemor pressure sensor -incorrect signalSignal wire short circuit to ground/positive, supply wire open/short circuit, transmission fluid level, governor pressure solenoid, governor pressure sensor, ECM
P1763Govemor pressure sensor -signal highSignal wire short circuit to positive, supply wire open circuit, transmission fluid level, governor pressure sensor, ECM
P1764Governor pressure sensor -signal lowSignal wire short circuit to ground, supply wire open circuit, transmission fluid level, governor pressure sensor, ECM
P1765Transmission system relay -wiring open/short circuitWiring, transmission system relay, ECM
P1775Solenoid switch valve locked in Tee (torqueconverter clutch) position -wiring open/short circuitWiring, transmission system relay, transmission fluid level low, UR pressure switch, solenoid switch valve
P1776Solenoid switch valve locked in UR (low/reverse) position -wiring open/short circuitWiring, transmission system relay, transmission fluid level low, UR pressure switch, solenoid switch valve
P1781Over Drive Pressure Switch Sense Circuit
P17822/4-OD Pressure Switch Circuit
P1787OD Hydraulic Pressure Test Failure
P1790Fault immediately after shiftSpeed ratio error, transmission mechanical fault
P1793Torque reduction communication error -wiring open/short circuitWiring, ECMITCM
P1794Transmission speed sensor -ground circuitWiring open circuit, TCM, input shaft speed (ISS) sensor, output shaft speed (055) sensor
P1797Manual shift overheatWiring, transmission fluid level low, transmission cooling fan -if fitted, transmission fluid temperature (TFT) sensor
P1800 – P1899 (Transmission)
P1830Clutch pedal position (CPP) switch override relay-circuit malfunctionWiring, CPP switch override relay, ECM
P1861Transfer tube disconnectedWiring open circuit/short to ground, damaged fuel tank, fuel level sender
P1897Engine speed calculation errorECM
P1899Park/neutral position (PNP) switch -input circuit malfunctionWiring, PNP switch, ECM
P1900 – P1999 (Transmission)
P1946Fire Prevention System Crash Event DetectedCar Had An Accident And The Inertia Switch Has Operated
P1C00 – P1C99 (Hybrid Propulsion)
P1CEABoost Side EVAP Purge System Performance
U110AController area network (CAN) data buscommunication malfunctionWiring, steering column control module, multifunction control module, ECM
U110CController area network (CAN) data bus communication malfunctionWiring, fuel level sensor, multifunction control module, ECM
U110EOutside air temperature sensor communication malfunctionWiring, outside air temperature sensor, multifunction control module, ECM
U1110Wheel speed sensor -communication malfunctionWiring, speed sensor, anti-lock brake system (ABS) control module, ECM
U1111Controller area network (CAN) data buscommunication malfunctionWiring, multifunction control module, ECM
U1113AlC pressure sensor -communication malfunctionWiring, multifunction control module, ECM
U1120Wheel speed sensor -communication malfunctionWiring, speed sensor, anti-lock brake system (ASS) control module, ECM
U1403Control area network (CAN) data bus -fuel level -signal implausibleWiring, instrument panel, multifunction control module, ECM
U1411Controller area network (CAN) data bus/fuel level -communication malfunctionWiring, instrumentation control module,multifunction control module, ECM
U1412Wheel speed sensor -CAN data communication malfunctionWiring, wheel speed sensor, ABS control module,ECM
U1413Controller area network (CAN) data buslinstrument panel -signal implausibleWiring, instrumentation control module,multifunction control module, ECM
U1417Wheel speed sensor, left -CAN data communication malfunctionWiring, wheel speed sensor, ASS control module,ECM
U1418Wheel speed sensor, right -CAN data communication malfunctionWiring, wheel speed sensor, ASS control module, ECM