Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2020 Infiniti QX80 LimitedFACTORY OEM SERVICE PROCEDURE
Engine Control System (DTCS) (4 Of 5)
- DTC Index
- Engine (ECM)
- DTC P062F: Control Module
- DTC P0643: Sensor Power Supply
- DTC P0850: PNP Switch
- DTC P100A: VVEL System
- DTC P100B: VVEL System
- DTC P1078: EVT Control Position Sensor
- DTC P1084: EVT Control Position Sensor
- DTC P1087: VVEL System
- DTC P1088: VVEL System
- DTC P1089: VVEL Control Shaft Position Sensor
- DTC P1090: VVEL Actuator Motor
- DTC P1091: VVEL Actuator Motor Relay
- DTC P1092: VVEL Control Shaft Position Sensor
- DTC P1093: VVEL Actuator Motor
- DTC P1148: Closed Loop Control
- DTC P1168: Closed Loop Control
- DTC P1197: Out Of Gas
- DTC P119A: Fuel Rail Pressure Sensor
- DTC P119B: Fuel Rail Pressure Sensor
- DTC P119C: Fuel Rail Pressure Sensor
- DTC P1212: TCS Communication Line
- DTC P1217: Engine Over Temperature
- DTC P1220: Fuel Pump Control Module (FPCM)
- DTC P1225: TP Sensor
- DTC P1226: TP Sensor
- DTC P1423: Cold Start Control
- DTC P1424: Cold Start Control
- DTC P1550: Battery Current Sensor
- DTC P1551: Battery Current Sensor
- DTC P1552: Battery Current Sensor
- DTC P1553: Battery Current Sensor
- DTC P1554: Battery Current Sensor
- DTC P1556: Battery Temperature Sensor
- DTC P1557: Battery Temperature Sensor
- DTC P1564: ASCD Steering Switch
- DTC P1564: ICC Steering Switch
- DTC P1568: ICC Function
- DTC P1572: ASCD Brake Switch
- DTC P1572: ICC Brake Switch
- DTC P1574: ASCD Vehicle Speed Sensor
- DTC P1574: ICC Vehicle Speed Sensor
- DTC P1575: Brake Switch
- DTC P1606: VVEL Control Module
- DTC P1607: VVEL Control Module
- DTC P1608: VVEL Sensor Power Supply
- DTC P1805: Brake Switch
- DTC P2080: EGT Sensor 1
- DTC P2081: Exhaust Gas Temperature Sensor
- DTC P2082: Exhaust Gas Temperature Sensor
- DTC P2083: Exhaust Gas Temperature Sensor
- DTC P2096: A/F Sensor 1
- DTC P2097: A/F Sensor 1
- DTC P2098: A/F Sensor 1
- DTC P2099: A/F Sensor 1
- DTC P2100: Throttle Control Motor Relay
- DTC P2101: Electric Throttle Control Function
- DTC P2103: Throttle Control Motor Relay
- DTC P2118: Throttle Control Motor
- DTC P2119: Electric Throttle Control Actuator
- DTC P2122: App Sensor
- DTC P2123: App Sensor
- DTC P2127: App Sensor
- DTC P2128: App Sensor
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.