P06F7 code meaning
Glow Plug Control Module 2 Control Circuit Low
Powertrain system Generic code P06xx codes Check engine light
What P06F7 means
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.
P06F7 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairAfter a drive cycle
Symptoms of P06F7
- 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
Common causes of P06F7
- Most likelyCommand line to glow module 2 chafed through to ground
- PossibleMoisture or corrosion in the connector bridging to ground
- Less likelyInput of glow module 2 or engine module driver faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Glow plug control module 2Module wiringEngine control module
What each part of P06F7 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 6 | Area: computer (engine control module) and output circuits. |
| F7 | The exact fault in that area. |
What to do next
- Note P06F7 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P06F7
What does P06F7 mean?
P06F7 means "Glow Plug Control Module 2 Control Circuit Low". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P06F7?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P06F7 fail an emissions test?
Yes, it can. P06F7 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P06F7 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P06F7 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.