| Infiniti Codes |
| Trouble Code |
Fault Location |
Probable Cause |
| P1031 | Heated oxygen sensor (H02S), bank 1, heater – voltage low | Wiring, H02S |
| P1032 | Heated oxygen sensor (H02S), bank 1, heater – voltage high | Wiring, H02S |
| P1051 | Heated oxygen sensor (H02S), bank 2, heater – voltage low | Wiring, H02S |
| P1052 | Heated oxygen sensor (H02S), bank 2, heater – voltage high | Wiring, H02S |
| P1065 | Engine control module (ECM) – battery voltage supply | Wiring, fuse, ECM |
| P1078 | Camshaft position (CMP) sensor, exhaust – low voltage | Wiring, CMP |
| P1084 | Camshaft position (CMP) sensor, exhaust – high voltage | Wiring, CMP |
| P1087 | VVEL Small Event Angle Malfunction Bank 1 | |
| P1088 | VVEL Small Event Angle Malfunction Bank 2 | |
| P1089 | VVEL Control Shaft Position Sensor Bank 1 Circuit | |
| P1090 | VVEL Actuator Motor Bank 1 | |
| P1091 | VVEL Actuator Motor Relay Circuit | |
| P1092 | VVEL Control Shaft Position Sensor Bank 2 Circuit | |
| P1093 | VVEL Actuator Motor Bank 2 | |
| P1102 | Mass air flow (MAF) sensor – performance problem | Wiring, MAF sensor |
| P1103 | MAP Sensor High Voltage | |
| P1104 | MAP Sensor Low Voltage | |
| P1105 | MAP - BARO switching valve - circuit malfunction | Wiring, MAP/BARO switching valve |
| P1110 | Intake valve timing control solenoid, bank 1 – malfunction | Wiring, intake valve control solenoid position sensor, CKP sensor, CMP sensor, ECM |
| P1111 | Intake valve timing control solenoid, bank 1 – circuit malfunction | Wiring, intake valve control solenoid, ECM |
| P1119 | Engine coolant temperature (ECT) sensor, radiator – circuit malfunction | Wiring, engine coolant temperature (ECT) sensor |
| P1120 | Throttle position (TP) circuit malfunction | Wiring, TP sensor, ECM |
| P1121 | Throttle motor – malfunction | Throttle motor, ECM |
| P1122 | Throttle motor – circuit malfunction | Wiring, throttle motor, ECM |
| P1123 | Throttle motor relay – circuit malfunction | Wiring, throttle motor relay, ECM |
| P1124 | Throttle motor – short circuit | Wiring, throttle motor, throttle motor relay, ECM |
| P1125 | Throttle position (TP) sensor 1 & 2 - signal malfunction | Wiring, TP sensor, mechanical fault, ECM |
| P1126 | Throttle motor – open circuit | Wiring, throttle motor, throttle motor relay, ECM |
| P1128 | Throttle motor – short circuit | Wiring, throttle motor, ECM |
| P1130 | Intake manifold air control solenoid – malfunction | Wiring, control solenoid, intake system, hose leak/blockage, control vacuum check switch, ECM |
| P1131 | Intake manifold air control solenoid – malfunction | Wiring, intake manifold air control solenoid |
| P1132 | Swirl Control Valve Circuit | |
| P1135 | Intake valve timing control solenoid, bank 2 – malfunction | Wiring, intake valve control solenoid position sensor, CKP sensor, CMP sensor, ECM |
| P1136 | Intake valve timing control solenoid, bank 2 – circuit malfunction | Wiring, intake valve control solenoid, ECM |
| P1137 | Swirl Control Valve Control Position Sensor Circuit | |
| P1138 | Swirl Control Valve Control System Performance | |
| P1140 | Camshaft position (CMP) actuator LH – circuit malfunction | Wiring, CMP actuator, mechanical fault, ECM |
| P1143 | Heated oxygen sensor (H02S) 1, bank 1 – voltage low | Wiring, mixture, H02S, ECM |
| P1144 | Heated oxygen sensor (H02S) 1, bank 1 – voltage high | H02S, fuel pressure, fuel system, ECM |
| P1145 | Camshaft position (CMP) actuator RH – circuit malfunction | Wiring, CMP actuator, mechanical fault, ECM |
| P1146 | Heated oxygen sensor (H02S) 2, bank 1 – voltage low | Wiring, mixture, H025, ECM |
| P1147 | Heated oxygen sensor (H02S) 2, bank 1 – voltage high | Wiring, H02S, fuel pressure, fuel system, ECM |
| P1148 | Closed loop control, bank 1 – inoperative | Wiring, H02S front, ECM |
| P1163 | Heated oxygen sensor (H02S) | Wiring, H025, ECM |
| P1164 | Heated oxygen sensor (H02S) 1, bank 2 – voltage high | H02S, fuel pressure, fuel system, ECM |
| P1165 | Intake manifold air control system -vacuum check switch circuit malfunction | Wiring, vacuum check switch, hose leak/ blockage, air control solenoid, ECM |
| P1166 | Heated oxygen sensor (H02S) 2, bank 2 – voltage high | Wiring, mixture, H025, ECM |
| P1167 | Heated oxygen sensor (H02S) 2, bank 2 – voltage high | Wiring, H02S, fuel pressure, fuel system, ECM |
| P1168 | Closed loop control LH – inoperative | Wiring, H02S, fuel pressure, fuel system, mechanical fault, ECM |
| P1195 | Engine Does Not Start | |
| P1196 | Poor Engine Power | |
| P1197 | Low Input From Fuel Level Sensor | |
| P1210 | Traction control system - malfunction | Wiring, TP sensor, mechanical fault, ECM |
| P1211 | ABS/TCS control module – communication malfunction | Wiring, ABS/TCS control module, ECM |
| P1212 | ABS/TCS control module – circuit malfunction | Wiring, ABS/TCS control module, ECM |
| P1217 | Engine over temperature | Cooling system, engine coolant blower motor |
| P1220 | Fuel pump control module – circuit malfunction | Wiring, fuel pump speed resistor, fuel pump control module |
| P1223 | Throttle position (TP) sensor 2 -voltage low | Wiring, TP sensor |
| P1224 | Throttle position (TP).sensor 2 – voltage high | Wiring, TP sensor |
| P1225 | Throttle motor position sensor – learning problem, voltage low | Wiring, TP sensor 1, TP sensor 2 |
| P1226 | Throttle motor position sensor – learning problem | Wiring, TP sensor 1, TP sensor 2 |
| P1227 | Accelerator pedal position (APP) sensor 2 – voltage low | Wiring, APP sensor |
| P1228 | Accelerator pedal position (APP) sensor 2 – voltage high | Wiring, APP sensor |
| P1229 | Engine control module (ECM) – sensor supply voltage low/high | Wiring, APP sensor, throttle motor position sensor, MAF sensor, fuel tank pressure sensor, TP sensor(s), refrigerant pressure sensor |
| P1233 | Electronic throttle control – performance | Wiring, throttle control motor |
| P1234 | Throttle motor position sensor – learning problem, voltage low, bank 2 | Wiring, TP simsor 1, TP sensor 2 |
| P1235 | Throttle motor position sensor – learning problem, bank 2 | Wiring, TP sensor 1, TP sensor 2 |
| P1236 | Throttle control motor – short circuit | Wiring, throttle control motor |
| P1238 | Throttle control motor – malfunction | Throttle control motor |
| P1239 | Throttle position (TP) – performance | Wiring, throttle actuator, TP sensor |
| P1271 | Heated oxygen sensor (H02S), bank 1 – voltage low | Wiring, H02S |
| P1272 | Heated oxygen sensor (H02S), bank 1 – voltage high | Wiring, H02S |
| P1273 | Heated oxygen sensor (H02S), bank 1 – lean mixture | H02S, fuel pressure, injectors, intake air leak |
| P1274 | Heated oxygen sensor (H02S), bank 1 – rich mixture | H02S, fuel pressure, injectors |
| P1276 | Heated oxygen sensor (H02S), bank 1 – activity | Wiring, H025 |
| P1277 | Air Fuel Ratio Sensor 1 Bank 1 Circuit Slow Response | |
| P1278 | Heated oxygen sensor (H02S), bank 1 – slow response | Wiring, fuel pressure, injectors, MAF sensor, PCV, H02S, intake air leaks, exhaust leaks |
| P1279 | Heated oxygen sensor (H02S), bank 1 – slow response | Wiring, fuel pressure, injectors, MAF sensor, PCV, H025, intake air leaks, exhaust leaks |
| P1281 | Heated oxygen sensor (H02S), bank 2 – voltage low | Wiring, H025 |
| P1282 | Heated oxygen sensor (H02S), bank 2 – voltage high | Wiring, H025 |
| P1283 | Heated oxygen sensor (H02S), bank 2 – lean mixture | H02S, fuel pressure, injectors, intake air leak |
| P1284 | Heated oxygen sensor (H02S), bank 2 – rich mixture | H02S, fuel pressure, injectors |
| P1286 | Heated oxygen sensor (H02S), bank 2 – activity | Wiring, H02S |
| P1288 | Heated oxygen sensor (H02S), bank 2 – slow response | Wiring, fuel pressure, injectors, MAF sensor, PCV, H02S, intake air leaks, exhaust leaks |
| P1289 | Heated oxygen sensor (H02S), bank 2 – slow response | Wiring, fuel pressure, injectors, MAF sensor, PCV, H02S, intake air leaks, exhaust leaks |
| P1290 | Throttle control motor relay – voltage low | Wiring, relay |
| P1320 | Ignition signal – circuit malfunction | Wiring, ignition coil/module, ignition system, CKP sensor, CMP sensor, ECM |
| P1335 | Crankshaft position (CKP) sensor – circuit malfunction | Wiring, CKP sensor, ECM |
| P1336 | Crankshaft position (CKP) sensor- signal malfunction | Wiring, CKP sensor, ECM |
P1400 – P1499 (Emission control) | | P1400 | Exhaust gas recirculation (EGR) valve - voltage incorrect | Wiring, EGR valve, mechanical fault, ECM |
| P1401 | Exhaust gas recirculation temperature (EGRT) sensor – circuit malfunction | Wiring, EGRT sensor, ECM |
| P1402 | Exhaust gas recirculation (EGR) system – excessive flow | Wiring, EGRIEVAP valve, EGR valve, EGRT sensor, EGR back pressure transducer, ECM |
| P1421 | Cold start emission control – malfunction | Intake/exhaust leak/blockage, mechanical fault, idle speed control (ISC) system, ignition control, engine coolant temperature (ECT) sensor, H025, ECM |
| P1440 | Evaporative emission (EVAP) canister purge control system – small leak | EVAP valve, hoses, mechanical fault |
| P1441 | Evaporative emission (EVAP) canister purge control system – small leak | EVAP valve, hoses, fuel filler cap, mechanical fault |
| P1442 | Evaporative emission (EVAP) canister purge system – small leak | EVAP canister purge system, hose leak, EVAP pressure sensor/vent valve, fuel filler cap, ECM |
| P1443 | Evaporative emission (EVAP) canister purge control system - circuit malfunction | Wiring, EVAP valve, ECM |
| P1444 | Evaporative emission (EVAP) canister purge control system – malfunction | Wiring, EVAP valve, hoses, mechanical fault, ECM |
| P1445 | Evaporative emission (EVAP) canister purge control valve - circuit malfunction | Wiring, EVAP valve, ECM |
| P1446 | Evaporative emission (EVAP) canister purge control valve – malfunction | Wiring, EVAP valve, mechanical fault, ECM |
| P1447 | Evaporative emission (EVAP) canister purge control system – malfunction | Wiring, EVAP valve, mechanical fault, ECM |
| P1448 | Evaporative emission (EVAP) canister purge control valve – malfunction | Wiring, EVAP valve, ECM |
| P1456 | Evaporative emission (EVAP) canister purge system – very small leak | EVAP canister purge system, hose leak, EVAP pressure sensor/vent valve, fuel filler cap, ECM |
| P1464 | Fuel gauge tank sensor- voltage high | Wiring, fuel gauge tank sensor, ECM |
| P1480 | Engine coolant blower motor control – circuit malfunction | Wiring, blower motor speed control solenoid valve, ECM |
| P1490 | Evaporative emission (EVAP) canister purge control system – malfunction | Wiring, EVAP valve, mechanical fault, ECM |
| P1491 | Evaporative emission (EVAP) canister purge control system – malfunction | Wiring, EVAP valve, ECM |
| P1492 | Evaporative emission (EVAP) canister purge control valve - malfunction | Wiring, EVAP solenoid, ECM |
| P1493 | Evaporative emission (EVAP) canister purge control valve - malfunction | Wiring, EVAP valve, ECM |
| P1550 | Battery condition sensor – malfunction | Wiring, battery condition sensor |
| P1551 | Battery condition sensor – low voltage | Wiring, battery condition sensor |
| P1552 | Battery condition sensor – high voltage | Wiring, battery condition sensor |
| P1553 | Battery condition sensor – signal too high | Wiring, battery condition sensor |
| P1554 | Battery condition sensor – signal too low | Wiring, battery condition sensor |
| P1564 | Cruise control master switch – circuit malfunction | Wiring, cruise control master switch, ECM |
| P1568 | Cruise control master switch – signal out of specification | Wiring, cruise control master switch, . ECM |
| P1572 | Cruise control brake pedal switch – circuit malfunction | Wiring, cruise control brake pedal switch, clutch pedal position (CPP) switch, ECM |
| P1574 | Cruise control vehicle speed sensor – signal malfunction | Wiring, cruise control vehicle speed sensor, ECM |
| P1605 | AT diagnosis communication -signal failure | Wiring, ECM |
| P1610 | Ignition key/engine control module (ECM) – malfunction | Incorrect ignition key, ECM |
| P1611 | Immobilizer control module/engine control module (ECM) – coding | Immobilizer control module/ECM incorrectly coded |
| P1612 | Immobilizer control module/engine control module (ECM) communication – malfunction | Wiring, immobilizer control module, ECM |
| P1613 | Engine control module (ECM), immobilizer function – internal failure | ECM |
| P1614 | Immobilizer control module/module coding plug communication – no signal | Wiring, immobilizer control module, module coding plug |
| P1615 | Ignition key/immobilizer control module communication – malfunction | Incorrect ignition key, immobilizer control module |
P1700 – P1799 (Transmission) | | P1700 | CVT shift control – malfunction | TCM trouble code(s) stored |
| P1701 | Transmission Control Module Power Supply | |
| P1702 | Transmission Control Module RAM | |
| P1703 | Transmission Control Module ROM | |
| P1704 | Transmission Control Module | |
| P1705 | AT- throttle position (TP) sensor- voltage high or low | Wiring, TP sensor, mechanical fault, ECM |
| P1706 | Park/neutral position (PNP) switch – circuit malfunction | Wiring, PNP switch, ECM |
| P1710 | Automatic Transmission Fluid Temperature Sensor Circuit. | |
| P1715 | Automatic transmission turbine shaft speed (TSS) sensor- circuit malfunction | Wiring, TSS sensor, TCM |
| P1716 | AT – turbine revolution sensor- circuit malfunction | Wiring, turbine sensor 1, turbine sensor 2, ECM |
| P1720 | Vehicle speed sensor (VSS) – signal variation | Wiring, TCM – DTC’s stored, ABSfTCS control module – DTC’s stored, instrument panel |
| P1721 | Vehicle Speed Sensor MTR | |
| P1722 | Estimated Vehicle Speed Signal | |
| P1726 | Electric Throttle Control System | |
| P1730 | AT- fail safe function -circuit malfunction | Wiring, transmission clutches, transmission solenoid valves, transmission pressure switches |
| P1731 | A/T 1st Engine Brake | |
| P1740 | CVT lock-up select solenoid valve – malfunction | Wiring, lock-up select solenoid valve |
| P1752 | AT – input clutch – solenoid valve malfunction | Wiring, input clutch solenoid valve |
| P1754 | AT- input clutch- solenoid valve malfunction | Wiring, input clutch solenoid valve, transmission pressure switch 3 |
| P1757 | AT- front brake- solenoid valve malfunction | Wiring, front brake solenoid valve |
| P1759 | AT -front brake – solenoid valve malfunction | Wiring, front brake solenoid valve, transmission pressure switch 1 |
| P1760 | AT- overrun clutch solenoid – voltage low | Wiring, solenoid, mechanical fault |
| P1762 | AT- direct clutch- solenoid valve malfunction | Wiring, direct clutch solenoid valve |
| P1764 | AT- direct clutch – solenoid valve malfunction | Wiring, direct clutch solenoid valve, transmission pressure switch 5 |
| P1767 | AT- high/low reverse solenoid valve – malfunction | Wiring, high/low reverse solenoid valve |
| P1769 | AT – high/low reverse solenoid valve – malfunction | Wiring, high/low reverse solenoid valve, transmission pressure switch 6 |
| P1772 | AT – low coast brake solenoid valve – malfunction | Wiring, low coast brake solenoid valve |
| P1774 | AT – low coast brake solenoid valve – malfunction | Wiring, low coast brake solenoid valve, transmission pressure switch 2 |
| P1775 | Torque Converter Clutch Solenoid Valve | |
| P1776 | Ignition Retard Request Duration Fault | |
| P1777 | CVT step motor – circuit malfunction | Wiring, step motor |
| P1778 | CVT step motor – mechanical malfunction | Step motor |
| P1780 | AT- shift change – signal malfunction | Wiring, TCM, ECM |
P1800 – P1899 (Transmission) | | P1800 | Intake manifold air control solenoid – circuit malfunction | Wiring, intake manifold air control solenoid |
| P1801 | Variable Intake Air System Control Solenoid Valve 2 | |
| P1805 | Brake pedal position (BPP) switch – circuit malfunction | Wiring, BPP switch |
| P1807 | Vehicle Speed Sensor A/T | |
| P1808 | Vehicle Speed Sensor ABS | |
| P1810 | 4 LO Switch | |
| P1813 | 4WD Shift Switch | |
| P1814 | Wait Detection Switch | |
| P1815 | Manual Mode Switch | |
| P1816 | Park/Neutral Position Switch | |
| P1817 | Actuator Motor | |
| P1818 | Actuator Position Switch | |
| P1819 | Transfer Control Device | |
| P1820 | Engine Speed Signal | |
| P1841 | Automatic Transmission Fluid Pressure Switch 1 | |
| P1843 | Automatic Transmission Fluid Pressure Switch 3 | |
| P1845 | Automatic Transmission Fluid Pressure Switch 5 | |
| P1846 | Automatic Transmission Fluid Pressure Switch 6 | |
P1900 – P1999 (Transmission) | | P1900 | Engine coolant blower motor - circuit | Wiring, blower motor, ECM |
| U1000 | CAN communication line – signal malfunction | Wiring |
| U1001 | CAN communication line – signal malfunction | Wiring |
| U1010 | CAN communication line – initialization malfunction | Wiring, ECM |
