OBDII Ram 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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Ram Codes
Trouble CodeFault LocationProbable Cause
P1000 – P1099 (Fuel and air metering and auxiliary emission control)
P1004Intake manifold air control valve (short runner) -performanceAutomatic shut-down (ASO) relay circuit open/short, control circuit short circuit to ground, control circuit open, intake manifold air control valve, ECM
P1100 – P1199 (Fuel and air metering)
P1105Turbocharger (TC) boost pressure actuator circuit malfunctionWiring, TC boost pressure actuator
P1110Decreased engine performance -high intake air temperatureWiring open circuit/short to positive, ground wiredefective, IAT sensor, ECT sensor, cooling system, high engine bay temperature, intake manifold heater relay(s), intake manifold heater(s), ECM 1
P1115Engine coolant temperature (ECT) sensor/intake air temperature (IAT) sensor/outside air temperature sensor -signal variationWiring, ECT sensor, IAT sensor, outside air temperature sensor, ECM
P1128Heated oxygen sensor (H02S) 1, bank 1 signal errorMechanical fault, wiring, fuel pressure, injector(s), intake leak, H02S, ECM
P1129Heated oxygen sensor (H02S) 1, bank 2 signal errorMechanical fault, wiring, fuel pressure, injector(s), intake leak, H02S, ECM
P113COxygen sensor (02S), control moduleWiring, connections, 025 control module
P1180Decreased engine performance -high injection pump fuel temperatureWiring open circuit/short to positive, ground wire defective, fuel temperature sensor, fueltemperature sensor, mechanical fault, high engine bay temperature, ECM 1
P1192Intake air temperature (IAT) sensor -voltage lowWiring, IAT sensor, ECM 1
P1193Intake air temperature (IAT) sensor -voltage highWiring, IAT sensor, ECM 1
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 (M02S) 2, bank 1 slow responseWiring, heating inoperative, exhaust leak, H02S
P1200 – P1299 (Fuel and air metering – injector circuit)
P1239Engine oil temperature (EOT) -temperature too lowEngine oil, wiring, EOT sensor, ECM
P125APower enable control circuit -voltage lowWiring, ECM
P125BPower enable control circuit -voltage highWiring, ECM
P1260Engine control module, output driver -open circuitWiring, injector(s), ignition coil(s), ECM,multifunction control module
P126BEngine control module, output driver -short to groundWiring, injector(s), ignition coil(s), ECM, multifunction control module
P126CEngine control module, output driver -short to positiveWiring, injector(s), ignition coil(s), ECM, multifunction control module
P126EEngine control module, output driver excessive current drawWiring, injector(s), ignition coil(s), ECM, multifunction control module
P1272A/C compressor clutch, circuit 2 -voltage lowWiring, AlC compressor clutch, ECM
P1273A/C compressor clutch, circuit 2 -voltage highWiring, A/C compressor clutch, ECM
P1274A/C compressor clutch, circuit 2 -open circuitWiring, A/C compressor clutch, ECM
P1275A/C compressor clutch, circuit 2 –circuit malfunctionWiring, A/C compressor clutch, ECM
P1277Starter motor control circuit -voltage lowWiring, starter motor, starter motor relay, multifunction control module, ECM
P1278Starter motor control circuit -voltage highWiring, starter motor, starter motor relay,multifunction control module, ECM
P1279Starter motor control circuit -open circuitWiring, starter motor, starter motor relay, multifunction control module, ECM
P127AStarter motor control circuit -circuit malfunctionWiring, starter motor, starter motor relay, multifunction control module, ECM
P127CFuel pump, circuit 2 -voltage lowWiring, fuel pump, ECM
P127DFuel pump, circuit 2 -voltage highWiring, fuel pump, ECM
P127EFuel pump, circuit 2 -open circuitWiring, fuel pump, ECM
P1280Fuel pump relay -circuit malfunctionWiring, fuel pump relay
P1281Engine temperature -low for long periodWiring, cooling system, coolant thermostat, EClsensor
P1282Fuel pump relayWiring open circuit/short circuit, fuel pump relay
P1283Engine control module (ECM) 1 -idle signal malfunctionWiring, injection pump control module g, ECM 1
P1284Injection pump control module -battery voltage out of rangeWiring, injection pump control module, ECM 1
P1285Injection pump control module relay -circuitmalfunctionWiring, injection pump control module relay
P1286Accelerator pedal position (APP) sensor -highinputWiring short to positive, APP sensor, ECM 1
P1287Injection pump control module/engine control module (ECM) 1 -supply voltage lowWiring, battery, alternator
P1290Compressed natural gas pressure sensorpressure highCompressed natural gas system, wiring,compressed natural gas pressure sensor
P1291Intake manifold heaters -no temperature riseWiring, intake manifold heater relay(s), intakemanifold heater(s), ECM 1
P1292Compressed natural gas pressure sensor voltage highWiring, compressed natural gas pressure sensor
P1293Compressed natural gas pressure sensor voltage lowWiring, compressed natural gas pressure sensor
P1294Idle speed control (ISC) system rpm lower/ higher than expectedWiring, air leak, throttle valve tight/sticking, lAC valve
P1295Accelerator pedal position (APP) sensor -low inputSignal wire short circuit to ground, supply wire open circuit, APP sensor, ECM 1
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
P129CPowertrain control module (PCM), inverter control -circuit 2 highWiring, inverter module, PCM
P129EPowertrain control module (PCM), inverter control-circuit 2 over-currentWiring, inverter module, PCM
P1300 – P1399 (Ignition system or misfire)
P1388Engine control relayWiring open circuit/short circuit, engine control relay
P1389Engine control relayWiring open circuit, engine control relay
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
P1399Glow plug waming lamp -circuit malfun~tionWiring, glow plug warning lamp, ECM 1
P1400 – P1499 (Emission control)
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
P1416Cylinder cut-out solenoid 6 -malfunctionWiring, cylinder cut-out solenoid, oil pressure, ECM
P1417Cylinder cut-out solenoid 7 -malfunctionWiring, cylinder cut-out solenoid, oil pressure, ECM
P141AExhaust gas temperature (EGT) sensor 1 & 2 -interchangedWiring, connectors swapped, diesel particulate filter (OPF)
P144E, Exhaust gas recirculation (EGR) -circuit voltage lowWiring, EGR valve, ECM
P144FExhaust gas recirculation (EGR) -circuit voltagehighWiring, EGR valve, ECM
P1451Diesel particulate filter (DPF) fullEGT low, mechanical fault, exhaust leak
P1475Engine control module (ECM) 1 -auxiliary 5 volt output highWiring, ECM 1
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
P1478AmbienUbattery temperature sensor -range/ performance problemWiring, ambient/battery temperature sensor
P1478Ambient/battery temperature sensor -range! performance problemWiring, ambient/battery temperature sensor
P1479Transmission cooling fan relay -circuit malfunctionWiring, transmission fluid level low, transmission cooling fan, transmission cooling fan relay
P1484Diesel particulate filter (DPF) temperature toohighFuel, injector, EGT sensor, mechanical fault
P1486Evaporative emission (EVAP) system -blockage detectedHose connection(s), hose blocked/trapped, EVAP canister
P1488Engine control module (ECM) -auxiliary 5 volt output lowWiring, ECM
P1491Engine coolant blower motor relayWiring open circuit/short circuit, engine coolant blower motor relay -low/high speed
P1492Ambient/battery temperature sensor -voltage highWiring, ambient/battery temperature sensor
P1493Ambient/battery temperature sensor -voltage lowWiring, ambient/battery temperature sensor, ECM
P1494Evaporative emission (EVAP) leak detection pump pressure switchWiring, hose leak/blockage, EVAP leak detection pump
P1495Evaporative emission (EVAP) leak detection pump solenoidWiring open circuit/short circuit, hose leak! blockage, EVAP leak detection pump solenoid
P1496Engine control module (ECM) -5 volt output lowECM
P1500 – P1599 (Vehicle or idle speed control)
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
P1506Crankcase pressure sensor range/performanceCrankcase pressure sensor
P1507Crankcase pressure sensor range/performanceCrankcase breather filter
P1508Crankcase pressure sensor range/performanceCrankcase breather filter, mechanical fault
P150DCold start emission control -irregular idle speedWiring, connections, engine coolant temperature (ECT) sensor, manifold absolute pressure (MAP) sensor, H02S circuit fault, mechanical fault, ECM
P1521Engine oil sensor module -malfunctionWiring, connectors, oil quality, oil level
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 AlB -circuit stuckWiring, poor connection, multi-function switch, mechanical fault, ECM
P1594Alternator -voltage highWiring, battery, alternator
P1595Cruise controlWiring open circuit/short circuit, hoses, cruise control master switch, cruise control vacuum switching valve
P1596Cruise control master switch -high voltageWiring, cruise control master switch
P1597Cruise control master switch -low voltageWiring, cruise control master switch
P1598NC refrigerant pressure sensor -high inputWiring, AlC refrigerant pressure too high (cooling fault/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) 1 not programmedNew ECM not programmed, incorrectly programmed, ECM 1
P1603Engine control module (ECM) -RAM link errorECM
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, AlC pressure sensor,APP sensor, CKP sensor, throttle control unit,TPS sensor, ECM
P1628Engine control module (ECM) -auxiliary 5 volt output erraticWiring, poor connection, AlC pressure sensor,APP sensor, CMP sensor, EGR solenoid, EGR valve position sensor, MAP sensor, transmission fluid pressure sensor, ECM
P1652CAN data bus -short circuit to groundWiring, connected system, ECM
P1680Clutch pedal position (CPP) switch -circuit malfunctionWiring, CPP switch, ECM
P1682Altemator -voltage lowWiring, battery, alternator drive belt, alternator
P1683Cruise controlWiring, cruise control vacuum switching valve
P1684Engine control module (ECM) 1 -supply voltage disconnected within last 50 ignition switch ON-OFF cyclesWiring, battery
P1685Key not programmed into immobilizer control moduleWiring, ignition key not matchedldamaged,immobilizer control module
P1686CAN data bus, immobilizer control module no signalWiring, immobilizer control module
P1687CAN data bus, instrumentation -no signalWiring, instrumentation control module(mechanical)
P1688Injection pump/injection pump control module -intemal faultInjection pump/injection pump control module
P1689Injection pump control module communication to engine control module (ECM) 1 malfunctionWiring, poor connection, injection pump control module, ECM 1
P1690Crankshaft position/injection pump camshaft position sensor -correlationWiring, CKP sensor, injection pump CMP sensor, mechanical fault, ECM 1
P1691Injection pump -intemal faultInjection pump/injection pump control module D
P1693Engine control module (ECM)Companion module trouble code detected in ECM
P1694CAN data bus, engine control module (ECM) no signalWiring, ECM
P1695CAN data bus, SCM -no signalWiring, BCM
P1696Engine control module (ECM) -EEPROM errorECM
P1697Engine control module (ECM) -EEPROM errorECM
P1698CAN data bus, engine control module (ECM) 2no signalWiring, ECM 2
P1698CAN data bus, transmission control module (TCM) no signalWiring, TCM
P1700 – P1799 (Transmission)
P1715Restricted port in T3 rangeOther trouble code(s) stored, transmission fluid level, transmission shift linkage adjustment 0
P1719Skip shift solenoid -circuit malfunctionWiring open circuit/short circuit, skip shift solenoid
P1736Transmission -gear/input speed/output speed ratio errorTransmission fluid level, wiring, input shaft speed (ISS) sensor, output shaft speed (055) sensor,transmission mechanical fault
P1740Torque converter clutch (TCC)/overdrive solenoid-performance problemTCC, overdrive solenoid, transmission mechanical fault
P1756Governor pressure not equal to target (35-40 PSI)Wiring, valve body, sensor supply wire open circuit, transmission fluid level, governor pressure sensor, governor pressure solenoid, transmission mechanical fault, TCM
P1757Governor pressure not equal to target -low pressure malfunctionSignal wire open circuit/short circuit, valve body,sensor supply wire open circuit, transmission fluid level, governor pressure solenoid, transmission mechanical fault, ECM -no 5 volt supply
P1762Governor pressure sensor -incorrect signalWiring, supply wire open circuit/short circuit, governor pressure solenoid, governor pressure sensor, transmission fluid level, transmission mechanical fault, TCM
P1763Governor pressure sensor -signal highSignal wire short circuit to positive, supply wire open circuit, transmission fluid level, governor pressure sensor, ECM
P1764Govemor pressure sensor -signal lowSignal wire short circuit to ground, supply wire open circuit, transmission fluid level, governor pressure sensor, TCM
P1765Transmission system relayWiring open circuit/short circuit, transmission system relay, ECM
P1776Solenoid switch valve locked in UR (low/reverse) positionWiring open circuit/short circuit, transmission system relay, transmission fluid level low, UR pressure switch, solenoid switch valve
P1790Fault immediately after shiftSpeed ratio error, transmission mechanical fault
P1793Torque reduction communication errorWiring open circuit/short circuit, 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)
P1897Engine control module (ECM) communication malfunctionECM
P1899Park/neutral position (PNP) switch -input circuit malfunctionWiring, PNP switch, ECM
P1D00 – P1D99 (ISO/SAE Reserved)
P1DF3ECU Not Initialized
P3400Cylinder cut-out system, bank 1 -malfunctionWiring, cylinder cut-out solenoid(s), oil pressure,H02S, ECM
P3401Cylinder cut-out solenoid 1 -circuit malfunctionWiring, cylinder cut-out solenoid, ECM
P3402Cylinder cut-out solenoid 1 -malfunctionWiring, cylinder cut-out solenoid, oil pressure,ECM
P3425Cylinder cut-out solenoid 4 -circuit malfunctionWiring, cylinder cut-out solenoid, ECM
P3426Cylinder cut-out solenoid 4 -malfunctionWiring, cylinder cut-out solenoid, oil pressure,ECM
P3441Cylinder cut-out solenoid 6 -circuit malfunctionWiring, cylinder cut-out solenoid, ECM
P3442Cylinder cut-out solenoid 6 -malfunctionWiring, cylinder cut-out solenoid, oil pressure,ECM
P3449Cylinder cut-out solenoid 7 -circuit malfunctionWiring, cylinder cut-out solenoid, ECM
P3450Cylinder cut-out solenoid 7 -malfunctionWiring, cylinder cut-out solenoid, oil pressure,ECM
P3497Cylinder cut-out system, bank 2 -malfunctionWiring, cylinder cut-out solenoid(s), oil pressure,H02S, ECM
U110ASteering column function control module, serialcommunication -circuit malfunctionWiring, CAN data bus, ECM
U110CFuel level, serial communication -circuit malfunctionWiring, instrument panel, CAN data bus, multifunction control module front, ECM
U110EOutside air temperature, serial communication -circuit malfunctionCAN data bus, multifunction control module front,ECM
U110FFuel volume, serial communication -circuitmalfunctionWiring, instrument panel, CAN data bus, multifunction control module front, ECM
U1110Vehicle speed, serial communication -circuit malfunctionCAN data bus, ASS control module, ECM
U1111Odometer mileage, serial communication -circuitmalfunctionWiring, instrument panel, CAN data bus, multifunction control module front, ECM
U1113NC pressure sensor -communication malfunctionWiring, multifunction control module, ECM
U1120Wheel distance traveled, serial communication -circuit malfunctionCAN data bus, ASS control module, ECM
U1403Fuel level, serial communication -implausible signalWiring, instrument panel, CAN data bus, multifunction control module front, ECM
U1403Fuel level, serial communication -implausiblesignalWiring, instrument panel, CAN data bus,multifunction control module front, ECM
U1411Fuel volume, serial communication implausible signalWiring, instrument panel, CAN data bus, multifunction control module front, ECM
U1412Vehicle speed, serial communication -implausible signalCAN data bus, ASS control module, ECM
U1413Odometer mileage, serial communication implausible signalWiring, instrument panel, CAN data bus, multifunction control module front, ECM
U1417LH front wheel, distance traveled -implausible signalABS trouble code(s) stored, CAN data bus, ABS control module, ECM
U1418RH front wheel, distance traveled implausible signalABS trouble code(s) stored, CAN data bus, ASS control module, ECM
U1421Fuel volume, serial communication implausible signalWiring, instrument panel, CAN data bus, multifunction control module front, ECM