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.
1997 Infiniti J30 BaseFACTORY OEM SERVICE PROCEDURE
Engine Controls - Tests W/Codes 3.0
- Introduction
- Self-Diagnostic System
- Final Check
- Trouble Code Definition
- Circuit Tests
- Please Read This First
- ECM Harness Connector
- DTC P0100: Mass Airflow (MAF) Sensor
- DTC P0110: Intake Air Temperature (IAT) Sensor
- DTC P0115 Or P0125: Engine Coolant Temperature (ECT) Sensor
- DTC P0120: Throttle Position (TP) Sensor
- DTC P0130: Front Right Heated Oxygen Sensor (Ho2S)
- DTC P0135: Front Right Heated Oxygen Sensor (Ho2S) Heater
- DTC P0136: Right Rear Heated Oxygen Sensor (Ho2S)
- DTC P0141: Right Rear Heated Oxygen Sensor (Ho2S) Heater
- DTC P0150: Front Left Heated Oxygen Sensor (Ho2S)
- DTC P0155: Front Left Heated Oxygen Sensor (Ho2S) Heater
- DTC P0156: Left Rear Left Heated Oxygen Sensor (Ho2S)
- DTC P0161: Left Rear Heated Oxygen Sensor (Ho2S) Heater
- DTC P0171 Or P0172: Fuel Injection System (Right Bank)
- DTC P0174 Or P0175: Fuel Injection System (Left Bank)
- DTC P0300, P0301, P0302, P0303, P0304, P0305 Or P0306: Cylinder Misfire/Multiple Cylinder Misfire
- DTC P0325: Knock Sensor (KS)
- DTC P0335 Or P1336: Crankshaft Position (CKP) Sensor
- DTC P0340: Camshaft Position (CMP) Sensor
- DTC P0400: EGR Function
- DTC P0420 Or P0430: 3-Way Catalyst Function
- DTC P0443: Canister Purge Control Solenoid Valve
- DTC P0500: Vehicle Speed Sensor (VSS)
- DTC P0505: Idle Air Control (IAC)
- DTC P0600: A/T Control
- DTC P0605: ECM-ECCS Control Module
- DTC P0705: Park/Neutral Position Switch
- DTC P1220: Fuel Pump Control Module (FPCM)
- DTC P1320: Ignition Signal
- DTC P1400: EGR Control (EGRC) Solenoid
- DTC P1401: EGR Temperature Sensor
- DTC P1443: Canister Control Vacuum Check Switch
- DTC 1605: Automatic Transmission (A/T) Control
- DTC P1900: Radiator Cooling Fan Control
- Summary
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.
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