P06EF code meaning
Engine Restart Performance
Powertrain system Generic code P06xx codes Check engine light
What P06EF means
P06EF concerns the automatic restart after the system itself has stopped the engine – stop-start or hybrid. The restart, by starter, reinforced stop-start starter or belt starter-generator, takes too long or fails. CARB does not count such a commanded shutdown as a stall. No manufacturer publishes the time limit. VW's Tiguan bulletins list P06EF together with P06E9 and trace both to dirt inside the starter; FCA fixes it on the 2019 Jeep Wrangler with engine-module software and lights the check engine light. Stop-start is then disabled. Besides the starter, a weak stop-start battery or fuel and ignition problems at restart can be the cause.
P06EF at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P06EF
- Engine does not restart or restarts late after stop-start
- Stop-start disabled
- Check engine light (FCA)
Common causes of P06EF
- Most likelyStarter or starter-generator worn, contacts intermittently open
- PossibleEngine module software
- PossibleWeak stop-start battery (AGM/EFB) or battery sensor
- Less likelyFuel pressure or ignition at restart
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Starter motorStarter generatorBatteryEngine control module
What each part of P06EF 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. |
| EF | The exact fault in that area. |
What to do next
- Note P06EF 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 P06EF
What does P06EF mean?
P06EF means "Engine Restart Performance". P06EF concerns the automatic restart after the system itself has stopped the engine – stop-start or hybrid. It is a generic code, so it means the same on every make.
Is it safe to drive with P06EF?
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 P06EF fail an emissions test?
P06EF is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P06EF to fix?
Difficulty: medium. A typical repair takes 0.3 to 3 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P06EF clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.