P06F7Glow Plug Control Module 2 Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P06F7 means the command line from the engine module to glow plug control module 2 is too low, typically shorted to ground – the counterpart of P0383 for module 1. The engine module's output driver detects the short by its current when switched on or by the line voltage when switched off. No manufacturer document available to us uses a second glow module – Ford's and GM's V8 diesels drive all eight plugs from one; the code suits systems with one module per cylinder bank. The description follows module 1 (P0383). An open line is P06F6, a short to positive P06F8. The plugs of module 2 then heat poorly or not at all, typically on one bank.
- What you may notice
- Check engine light, possibly glow plug/wait-to-start lamp
- Hard cold start, long cranking in frost
- Rough cold idle and white smoke, often one cylinder bank only
- Usually no symptoms when warm
- Likely causes
- LikelyCommand line to glow module 2 chafed through to ground
- PossibleMoisture or corrosion in the connector bridging to ground
- RareInput of glow module 2 or engine module driver faulty
- 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.