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Powertrain

P0391

Code meaning and manufacturer information

OBD-II / DTC

Reference meaning

What does this code mean?

The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.

A code identifies a detected condition, not a part that must automatically be replaced.

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A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

Before replacing a part

Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.

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Manufacturer communications

11

Original wording in English

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AUDI

This bulletin provides information when MIL on and/or Camshaft Position faults P039100, P036600 or P034600 stored in ECM.

AUDI

This bulletin provides information when MIL on and/or Camshaft Position faults P039100, P036600 or P034600 stored in ECM.

No. 242-22 ↗

PORSCHE

Technical information on the check engine warning light active in conjunction with fault memory entry “P036600”,“P039100”, “P034100” and/or “P034600” in the DME Control Unit

07-95-15 ↗

SUBARU

"THIS SERVICE INFORMATION BULLETIN ANNOUNCES A DESIGN CHANGE TO THE ENGINE WIRING HARNESS TO PREVENT WATER INTRUSION AND ACCUMULATION FROM OCCURRING INSIDE THE CORRUGATED PLASTIC HARNESS TUBING. IN SOME CASES, THIS ACCUMULATION MAY CAUSE A CHECK ENGINE LIGHT TO ILLUMINATE AND EXHAUST CAMSHAFT POSITION-RELATED DTCS TO BE STORED I…

Check vehicle applicability

35

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

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MakeModelModel year
AudiRS Q8 ↗2025
AudiRS Q8 ↗2023
AudiRS Q8 ↗2022
AudiRS Q8 ↗2021
AudiRS Q8 ↗2020
BuickALLURE ↗2007
BuickENCLAVE ↗2008
BuickLACROSSE ↗2007

Can I keep driving?

A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.