U0407Invalid Data Received From Glow Plug Control Module
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- U0407 is stored when the engine controller receives data from the glow plug control module that it rejects as implausible. Volkswagen lists the code in the 2014 Touareg diesel OBD chart as Invalid Data Received From Glow Plug Control Module 1, criterion implausible messages received. On that engine the glow unit talks to the ECM over LIN; VW uses U0106 for a missing LIN message and U0307 for a failed software check, which separates the three siblings clearly. Ford's 2012 OBD summary shows the same U04xx idea for other modules: data arrive but are faulted. Because the glow module also reports plug faults, invalid data can hide real glow plug problems. Expect hard cold starts, white smoke and on a diesel usually the MIL.
- What you may notice
- Check engine or glow plug light on
- Hard starting in cold weather
- White smoke and rough idle after cold start
- Likely causes
- LikelyLIN wire or connector between glow module and ECM corroded or loose
- PossibleGlow plug control module internally faulty
- PossibleVoltage dip during glow check or cranking
- RareGlow module software does not match the ECM
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.