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Powertrain

P0409

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

1

Original wording in English

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SB-10-N-001 ↗

ISUZU

ISUZU: REPEATING EGR DTC'S P042E, P0403, P0404, P0409, EGR VALVE CONNECTOR TERMINAL SPREAD. TECHNICIAN DIAGNOSIS FOR DTC CODES USUALLY RESULTS IN REPLACEMENT OF THE EGR VALVE. INVESTIGATION OF RETURNED EGR VALVES SHOWS THAT THERE IS NO FAULT WITH THE EGR VALVE. *PE

Check vehicle applicability

13

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
IsuzuF SERIES ↗2007
IsuzuF-SERIES ↗2009
IsuzuF-SERIES ↗2008
IsuzuF-SERIES ↗2007
IsuzuFTR ↗2009
IsuzuFTR ↗2008
IsuzuFTR ↗2007
IsuzuFVR ↗2009

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.