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.

2012 Infiniti G25 BaseFACTORY OEM SERVICE PROCEDURE

Engine Control System - DTCS P0130 To P0442

DTC P0130, P0150: A/F Sensor 1
- Description
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Component Function Check
- Diagnosis Procedure
DTC P0131, P0151: A/F Sensor 1
- Description
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Diagnosis Procedure
DTC P0132, P0152: A/F Sensor 1
- Description
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Diagnosis Procedure
DTC P0133, P0153: A/F Sensor 1
- Description
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Diagnosis Procedure
DTC P0137, P0157: Ho2S2
- Description
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Component Function Check
- Diagnosis Procedure
- Component Inspection
DTC P0138, P0158: Ho2S2
- Description
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Component Function Check
- Diagnosis Procedure
- Component Inspection
DTC P0139, P0159: Ho2S2
- Description
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Component Function Check
- Diagnosis Procedure
- Component Inspection
DTC P0171, P0174: Fuel Injection System Function
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Diagnosis Procedure
DTC P0172, P0175: Fuel Injection System Function
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Diagnosis Procedure
DTC P0181: FTT Sensor
- Description
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Component Function Check
- Diagnosis Procedure
- Component Inspection
DTC P0182, P0183: FTT Sensor
- Description
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Diagnosis Procedure
- Component Inspection
DTC P0196: EOT Sensor
- Description
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Component Function Check
- Diagnosis Procedure
- Component Inspection
DTC P0197, P0198: EOT Sensor
- Description
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Diagnosis Procedure
- Component Inspection
DTC P0222, P0223, P2132, P2133: TP Sensor
- Description
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Diagnosis Procedure
- Component Inspection
- Special Repair Requirement
DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306: Misfire
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Diagnosis Procedure
DTC P0327, P0328: KS
- Description
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Diagnosis Procedure
- Component Inspection
DTC P0335: CKP Sensor (Pos)
- Description
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Diagnosis Procedure
- Component Inspection
DTC P0340, P0345: CMP Sensor (Phase)
- Description
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Diagnosis Procedure
- Component Inspection
DTC P0420, P0430: Three Way Catalyst Function
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Component Function Check
- Diagnosis Procedure
DTC P0441: EVAP Control System
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Component Function Check
- Diagnosis Procedure
DTC P0442: EVAP Control System
- DTC Logic
  - DTC Detection Logic
  - DTC Confirmation Procedure
- Diagnosis Procedure
- Component Inspection

Factory Service Tools

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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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