| Ram Codes |
|---|
|
| Trouble Code | Fault Location | Probable Cause |
|---|
P1000 – P1099 (Fuel and air metering and auxiliary emission control) | | P1004 | Intake manifold air control valve (short runner) -performance | Automatic 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) | | P1105 | Turbocharger (TC) boost pressure actuator circuit malfunction | Wiring, TC boost pressure actuator |
| P1110 | Decreased engine performance -high intake air temperature | Wiring 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 |
| P1115 | Engine coolant temperature (ECT) sensor/intake air temperature (IAT) sensor/outside air temperature sensor -signal variation | Wiring, ECT sensor, IAT sensor, outside air temperature sensor, ECM |
| P1128 | Heated oxygen sensor (H02S) 1, bank 1 signal error | Mechanical fault, wiring, fuel pressure, injector(s), intake leak, H02S, ECM |
| P1129 | Heated oxygen sensor (H02S) 1, bank 2 signal error | Mechanical fault, wiring, fuel pressure, injector(s), intake leak, H02S, ECM |
| P113C | Oxygen sensor (02S), control module | Wiring, connections, 025 control module |
| P1180 | Decreased engine performance -high injection pump fuel temperature | Wiring open circuit/short to positive, ground wire defective, fuel temperature sensor, fueltemperature sensor, mechanical fault, high engine bay temperature, ECM 1 |
| P1192 | Intake air temperature (IAT) sensor -voltage low | Wiring, IAT sensor, ECM 1 |
| P1193 | Intake air temperature (IAT) sensor -voltage high | Wiring, IAT sensor, ECM 1 |
| P1194 | Heated oxygen sensor (H02S), heater control -circuit malfunction | Wiring, H02S, ECM |
| P1195 | Heated oxygen sensor (H02S) 1, bank 1 slow response | Wiring, heating inoperative, exhaust leak, H02S |
| P1196 | Heated oxygen sensor (H02S) 1, bank 2 slow response | Wiring, heating inoperative, exhaust leak, H02S |
| P1197 | Heated oxygen sensor (M02S) 2, bank 1 slow response | Wiring, heating inoperative, exhaust leak, H02S |
P1200 – P1299 (Fuel and air metering – injector circuit) | | P1239 | Engine oil temperature (EOT) -temperature too low | Engine oil, wiring, EOT sensor, ECM |
| P125A | Power enable control circuit -voltage low | Wiring, ECM |
| P125B | Power enable control circuit -voltage high | Wiring, ECM |
| P1260 | Engine control module, output driver -open circuit | Wiring, injector(s), ignition coil(s), ECM,multifunction control module |
| P126B | Engine control module, output driver -short to ground | Wiring, injector(s), ignition coil(s), ECM, multifunction control module |
| P126C | Engine control module, output driver -short to positive | Wiring, injector(s), ignition coil(s), ECM, multifunction control module |
| P126E | Engine control module, output driver excessive current draw | Wiring, injector(s), ignition coil(s), ECM, multifunction control module |
| P1272 | A/C compressor clutch, circuit 2 -voltage low | Wiring, AlC compressor clutch, ECM |
| P1273 | A/C compressor clutch, circuit 2 -voltage high | Wiring, A/C compressor clutch, ECM |
| P1274 | A/C compressor clutch, circuit 2 -open circuit | Wiring, A/C compressor clutch, ECM |
| P1275 | A/C compressor clutch, circuit 2 –circuit malfunction | Wiring, A/C compressor clutch, ECM |
| P1277 | Starter motor control circuit -voltage low | Wiring, starter motor, starter motor relay, multifunction control module, ECM |
| P1278 | Starter motor control circuit -voltage high | Wiring, starter motor, starter motor relay,multifunction control module, ECM |
| P1279 | Starter motor control circuit -open circuit | Wiring, starter motor, starter motor relay, multifunction control module, ECM |
| P127A | Starter motor control circuit -circuit malfunction | Wiring, starter motor, starter motor relay, multifunction control module, ECM |
| P127C | Fuel pump, circuit 2 -voltage low | Wiring, fuel pump, ECM |
| P127D | Fuel pump, circuit 2 -voltage high | Wiring, fuel pump, ECM |
| P127E | Fuel pump, circuit 2 -open circuit | Wiring, fuel pump, ECM |
| P1280 | Fuel pump relay -circuit malfunction | Wiring, fuel pump relay |
| P1281 | Engine temperature -low for long period | Wiring, cooling system, coolant thermostat, EClsensor |
| P1282 | Fuel pump relay | Wiring open circuit/short circuit, fuel pump relay |
| P1283 | Engine control module (ECM) 1 -idle signal malfunction | Wiring, injection pump control module g, ECM 1 |
| P1284 | Injection pump control module -battery voltage out of range | Wiring, injection pump control module, ECM 1 |
| P1285 | Injection pump control module relay -circuitmalfunction | Wiring, injection pump control module relay |
| P1286 | Accelerator pedal position (APP) sensor -highinput | Wiring short to positive, APP sensor, ECM 1 |
| P1287 | Injection pump control module/engine control module (ECM) 1 -supply voltage low | Wiring, battery, alternator |
| P1290 | Compressed natural gas pressure sensorpressure high | Compressed natural gas system, wiring,compressed natural gas pressure sensor |
| P1291 | Intake manifold heaters -no temperature rise | Wiring, intake manifold heater relay(s), intakemanifold heater(s), ECM 1 |
| P1292 | Compressed natural gas pressure sensor voltage high | Wiring, compressed natural gas pressure sensor |
| P1293 | Compressed natural gas pressure sensor voltage low | Wiring, compressed natural gas pressure sensor |
| P1294 | Idle speed control (ISC) system rpm lower/ higher than expected | Wiring, air leak, throttle valve tight/sticking, lAC valve |
| P1295 | Accelerator pedal position (APP) sensor -low input | Signal wire short circuit to ground, supply wire open circuit, APP sensor, ECM 1 |
| P1296 | Manifold absolute pressure (MAP) sensor no 5 volt supply | Wiring, MAP sensor, ECM |
| P1297 | Manifold absolute pressure (MAP) sensor | Wiring, hose connection(s), MAP sensor |
| P1298 | System too lean -at prolonged wide open throttle | Intake/exhaust leak, MAP sensor, fuel pressure/pump, injector(s), H02S |
| P1299 | Manifold absolute pressure (MAP) sensor/ throttle position (TP) sensor | Intake leak, hose connection(s), MAP sensor, TP sensor |
| P129C | Powertrain control module (PCM), inverter control -circuit 2 high | Wiring, inverter module, PCM |
| P129E | Powertrain control module (PCM), inverter control-circuit 2 over-current | Wiring, inverter module, PCM |
P1300 – P1399 (Ignition system or misfire) | | P1388 | Engine control relay | Wiring open circuit/short circuit, engine control relay |
| P1389 | Engine control relay | Wiring open circuit, engine control relay |
| P1391 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor -intermittent signal | Wiring, poor connection, air gap, CKP sensor, CMP sensor |
| P1398 | Engine control module (ECM) -misfire detection limit reached | Wiring, poor connection, CKP sensor |
| P1399 | Glow plug waming lamp -circuit malfun~tion | Wiring, glow plug warning lamp, ECM 1 |
P1400 – P1499 (Emission control) | | P1404 | Exhaust gas recirculation (EGR) valve position sensor malfunction | Wiring, exhaust gas recirculation (EGR) valve, ECM |
| P1411 | Cylinder cut-out solenoid 1 -malfunction | Wiring, cylinder cut-out solenoid, oil pressure, ECM |
| P1414 | Cylinder cut-out solenoid 4 -malfunction | Wiring, cylinder cut-out solenoid, oil pressure, ECM |
| P1416 | Cylinder cut-out solenoid 6 -malfunction | Wiring, cylinder cut-out solenoid, oil pressure, ECM |
| P1417 | Cylinder cut-out solenoid 7 -malfunction | Wiring, cylinder cut-out solenoid, oil pressure, ECM |
| P141A | Exhaust gas temperature (EGT) sensor 1 & 2 -interchanged | Wiring, connectors swapped, diesel particulate filter (OPF) |
| P144E | , Exhaust gas recirculation (EGR) -circuit voltage low | Wiring, EGR valve, ECM |
| P144F | Exhaust gas recirculation (EGR) -circuit voltagehigh | Wiring, EGR valve, ECM |
| P1451 | Diesel particulate filter (DPF) full | EGT low, mechanical fault, exhaust leak |
| P1475 | Engine control module (ECM) 1 -auxiliary 5 volt output high | Wiring, ECM 1 |
| P1476 | Secondary air injection (AIR) system -insufficientflow detected | AIR pump, AIR valve, AIR hose(s) |
| P1477 | Secondary air injection (AIR) system excessive flow detected | AIR pump, AIR valve, AIR hose(s), ECM |
| P1478 | AmbienUbattery temperature sensor -range/ performance problem | Wiring, ambient/battery temperature sensor |
| P1478 | Ambient/battery temperature sensor -range! performance problem | Wiring, ambient/battery temperature sensor |
| P1479 | Transmission cooling fan relay -circuit malfunction | Wiring, transmission fluid level low, transmission cooling fan, transmission cooling fan relay |
| P1484 | Diesel particulate filter (DPF) temperature toohigh | Fuel, injector, EGT sensor, mechanical fault |
| P1486 | Evaporative emission (EVAP) system -blockage detected | Hose connection(s), hose blocked/trapped, EVAP canister |
| P1488 | Engine control module (ECM) -auxiliary 5 volt output low | Wiring, ECM |
| P1491 | Engine coolant blower motor relay | Wiring open circuit/short circuit, engine coolant blower motor relay -low/high speed |
| P1492 | Ambient/battery temperature sensor -voltage high | Wiring, ambient/battery temperature sensor |
| P1493 | Ambient/battery temperature sensor -voltage low | Wiring, ambient/battery temperature sensor, ECM |
| P1494 | Evaporative emission (EVAP) leak detection pump pressure switch | Wiring, hose leak/blockage, EVAP leak detection pump |
| P1495 | Evaporative emission (EVAP) leak detection pump solenoid | Wiring open circuit/short circuit, hose leak! blockage, EVAP leak detection pump solenoid |
| P1496 | Engine control module (ECM) -5 volt output low | ECM |
P1500 – P1599 (Vehicle or idle speed control) | | P1501 | Vehicle over-speed condition -rear axle speed greater than front axle | Wiring, VSS, mechanical fault, ECM |
| P1502 | Vehicle over-speed condition -front axle speed greater than rear axle | Wiring, VSS, mechanical fault, ECM |
| P1506 | Crankcase pressure sensor range/performance | Crankcase pressure sensor |
| P1507 | Crankcase pressure sensor range/performance | Crankcase breather filter |
| P1508 | Crankcase pressure sensor range/performance | Crankcase breather filter, mechanical fault |
| P150D | Cold start emission control -irregular idle speed | Wiring, connections, engine coolant temperature (ECT) sensor, manifold absolute pressure (MAP) sensor, H02S circuit fault, mechanical fault, ECM |
| P1521 | Engine oil sensor module -malfunction | Wiring, connectors, oil quality, oil level |
| P1572 | Brake pedal position (BPP) switch -circuit malfunction | BPP switch adjustment, wiring, BPP switch |
| P1573 | Brake pedal position (BPP) switch -circuit malfunction | BPP switch adjustment, wiring, BPP switch |
| P1593 | Cruise control system, multi-function input AlB -circuit stuck | Wiring, poor connection, multi-function switch, mechanical fault, ECM |
| P1594 | Alternator -voltage high | Wiring, battery, alternator |
| P1595 | Cruise control | Wiring open circuit/short circuit, hoses, cruise control master switch, cruise control vacuum switching valve |
| P1596 | Cruise control master switch -high voltage | Wiring, cruise control master switch |
| P1597 | Cruise control master switch -low voltage | Wiring, cruise control master switch |
| P1598 | NC refrigerant pressure sensor -high input | Wiring, AlC refrigerant pressure too high (cooling fault/incorrectly charged), AlC refrigerant pressure sensor |
| P1599 | AlC refrigerant pressure sensor -low input | Wiring, AlC refrigerant pressure too low (incorrectly charged), AlC refrigerant pressure sensor |
P1600 – P1699 (ECM – computer output circuit) | | P1602 | Engine control module (ECM) 1 not programmed | New ECM not programmed, incorrectly programmed, ECM 1 |
| P1603 | Engine control module (ECM) -RAM link error | ECM |
| P1604 | Engine control module (ECM) -RAM read/writeerror | ECM |
| P1607 | Engine control module (ECM) -shut down timer error | ECM |
| P1618 | Engine control module (ECM) -primary 5 volt output erratic | Wiring, poor connection, AlC pressure sensor,APP sensor, CKP sensor, throttle control unit,TPS sensor, ECM |
| P1628 | Engine control module (ECM) -auxiliary 5 volt output erratic | Wiring, poor connection, AlC pressure sensor,APP sensor, CMP sensor, EGR solenoid, EGR valve position sensor, MAP sensor, transmission fluid pressure sensor, ECM |
| P1652 | CAN data bus -short circuit to ground | Wiring, connected system, ECM |
| P1680 | Clutch pedal position (CPP) switch -circuit malfunction | Wiring, CPP switch, ECM |
| P1682 | Altemator -voltage low | Wiring, battery, alternator drive belt, alternator |
| P1683 | Cruise control | Wiring, cruise control vacuum switching valve |
| P1684 | Engine control module (ECM) 1 -supply voltage disconnected within last 50 ignition switch ON-OFF cycles | Wiring, battery |
| P1685 | Key not programmed into immobilizer control module | Wiring, ignition key not matchedldamaged,immobilizer control module |
| P1686 | CAN data bus, immobilizer control module no signal | Wiring, immobilizer control module |
| P1687 | CAN data bus, instrumentation -no signal | Wiring, instrumentation control module(mechanical) |
| P1688 | Injection pump/injection pump control module -intemal fault | Injection pump/injection pump control module |
| P1689 | Injection pump control module communication to engine control module (ECM) 1 malfunction | Wiring, poor connection, injection pump control module, ECM 1 |
| P1690 | Crankshaft position/injection pump camshaft position sensor -correlation | Wiring, CKP sensor, injection pump CMP sensor, mechanical fault, ECM 1 |
| P1691 | Injection pump -intemal fault | Injection pump/injection pump control module D |
| P1693 | Engine control module (ECM) | Companion module trouble code detected in ECM |
| P1694 | CAN data bus, engine control module (ECM) no signal | Wiring, ECM |
| P1695 | CAN data bus, SCM -no signal | Wiring, BCM |
| P1696 | Engine control module (ECM) -EEPROM error | ECM |
| P1697 | Engine control module (ECM) -EEPROM error | ECM |
| P1698 | CAN data bus, engine control module (ECM) 2no signal | Wiring, ECM 2 |
| P1698 | CAN data bus, transmission control module (TCM) no signal | Wiring, TCM |
P1700 – P1799 (Transmission) | | P1715 | Restricted port in T3 range | Other trouble code(s) stored, transmission fluid level, transmission shift linkage adjustment 0 |
| P1719 | Skip shift solenoid -circuit malfunction | Wiring open circuit/short circuit, skip shift solenoid |
| P1736 | Transmission -gear/input speed/output speed ratio error | Transmission fluid level, wiring, input shaft speed (ISS) sensor, output shaft speed (055) sensor,transmission mechanical fault |
| P1740 | Torque converter clutch (TCC)/overdrive solenoid-performance problem | TCC, overdrive solenoid, transmission mechanical fault |
| P1756 | Governor 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 |
| P1757 | Governor pressure not equal to target -low pressure malfunction | Signal 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 |
| P1762 | Governor pressure sensor -incorrect signal | Wiring, supply wire open circuit/short circuit, governor pressure solenoid, governor pressure sensor, transmission fluid level, transmission mechanical fault, TCM |
| P1763 | Governor pressure sensor -signal high | Signal wire short circuit to positive, supply wire open circuit, transmission fluid level, governor pressure sensor, ECM |
| P1764 | Govemor pressure sensor -signal low | Signal wire short circuit to ground, supply wire open circuit, transmission fluid level, governor pressure sensor, TCM |
| P1765 | Transmission system relay | Wiring open circuit/short circuit, transmission system relay, ECM |
| P1776 | Solenoid switch valve locked in UR (low/reverse) position | Wiring open circuit/short circuit, transmission system relay, transmission fluid level low, UR pressure switch, solenoid switch valve |
| P1790 | Fault immediately after shift | Speed ratio error, transmission mechanical fault |
| P1793 | Torque reduction communication error | Wiring open circuit/short circuit, ECMITCM |
| P1794 | Transmission speed sensor -ground circuit | Wiring open circuit, TCM, input shaft speed (ISS)sensor, output shaft speed (055) sensor |
| P1797 | Manual shift overheat | Wiring, transmission fluid level low, transmission cooling fan -if fitted, transmission fluid temperature (TFT) sensor |
P1800 – P1899 (Transmission) | | P1897 | Engine control module (ECM) communication malfunction | ECM |
| P1899 | Park/neutral position (PNP) switch -input circuit malfunction | Wiring, PNP switch, ECM |
P1D00 – P1D99 (ISO/SAE Reserved) | | P1DF3 | ECU Not Initialized | |
| P3400 | Cylinder cut-out system, bank 1 -malfunction | Wiring, cylinder cut-out solenoid(s), oil pressure,H02S, ECM |
| P3401 | Cylinder cut-out solenoid 1 -circuit malfunction | Wiring, cylinder cut-out solenoid, ECM |
| P3402 | Cylinder cut-out solenoid 1 -malfunction | Wiring, cylinder cut-out solenoid, oil pressure,ECM |
| P3425 | Cylinder cut-out solenoid 4 -circuit malfunction | Wiring, cylinder cut-out solenoid, ECM |
| P3426 | Cylinder cut-out solenoid 4 -malfunction | Wiring, cylinder cut-out solenoid, oil pressure,ECM |
| P3441 | Cylinder cut-out solenoid 6 -circuit malfunction | Wiring, cylinder cut-out solenoid, ECM |
| P3442 | Cylinder cut-out solenoid 6 -malfunction | Wiring, cylinder cut-out solenoid, oil pressure,ECM |
| P3449 | Cylinder cut-out solenoid 7 -circuit malfunction | Wiring, cylinder cut-out solenoid, ECM |
| P3450 | Cylinder cut-out solenoid 7 -malfunction | Wiring, cylinder cut-out solenoid, oil pressure,ECM |
| P3497 | Cylinder cut-out system, bank 2 -malfunction | Wiring, cylinder cut-out solenoid(s), oil pressure,H02S, ECM |
| U110A | Steering column function control module, serialcommunication -circuit malfunction | Wiring, CAN data bus, ECM |
| U110C | Fuel level, serial communication -circuit malfunction | Wiring, instrument panel, CAN data bus, multifunction control module front, ECM |
| U110E | Outside air temperature, serial communication -circuit malfunction | CAN data bus, multifunction control module front,ECM |
| U110F | Fuel volume, serial communication -circuitmalfunction | Wiring, instrument panel, CAN data bus, multifunction control module front, ECM |
| U1110 | Vehicle speed, serial communication -circuit malfunction | CAN data bus, ASS control module, ECM |
| U1111 | Odometer mileage, serial communication -circuitmalfunction | Wiring, instrument panel, CAN data bus, multifunction control module front, ECM |
| U1113 | NC pressure sensor -communication malfunction | Wiring, multifunction control module, ECM |
| U1120 | Wheel distance traveled, serial communication -circuit malfunction | CAN data bus, ASS control module, ECM |
| U1403 | Fuel level, serial communication -implausible signal | Wiring, instrument panel, CAN data bus, multifunction control module front, ECM |
| U1403 | Fuel level, serial communication -implausiblesignal | Wiring, instrument panel, CAN data bus,multifunction control module front, ECM |
| U1411 | Fuel volume, serial communication implausible signal | Wiring, instrument panel, CAN data bus, multifunction control module front, ECM |
| U1412 | Vehicle speed, serial communication -implausible signal | CAN data bus, ASS control module, ECM |
| U1413 | Odometer mileage, serial communication implausible signal | Wiring, instrument panel, CAN data bus, multifunction control module front, ECM |
| U1417 | LH front wheel, distance traveled -implausible signal | ABS trouble code(s) stored, CAN data bus, ABS control module, ECM |
| U1418 | RH front wheel, distance traveled implausible signal | ABS trouble code(s) stored, CAN data bus, ASS control module, ECM |
| U1421 | Fuel volume, serial communication implausible signal | Wiring, instrument panel, CAN data bus, multifunction control module front, ECM |
