P26F2 code meaning
Starter Relay B Stuck On
Powertrain system Generic code P26xx codes Check engine light
What P26F2 means
P26F2 concerns the second starter relay, which on stop-start vehicles may engage the pinion of a tandem starter (GM) or form the second switching path of a two-relay layout (FCA Starter Control 2). The code means relay B fails to drop out after its command ends. Depending on wiring, the pinion may then remain in mesh, or the starter could be energised as soon as relay A closes. No manufacturer documents P26F2 publicly; the GM tables only cover the electrical driver faults of relay B (P26E4 to P26E6), and FCA bulletins tie Starter Control 2 to plausibility faults. Welded contacts and a control line fed from elsewhere are the obvious suspects. Driving on with this fault risks damage to the pinion and the flywheel ring gear.
P26F2 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.3 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P26F2
- Grinding or whining from the starter after the engine runs
- Check engine light, stop-start unavailable
Common causes of P26F2
- Most likelyContacts of relay B welded or stuck
- PossibleControl line of relay B fed from another circuit
- Less likelyPinion solenoid of the tandem starter sticking mechanically
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Starter relay bStarter motor b
What each part of P26F2 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 6 | Area: computer (engine control module) and output circuits. |
| F2 | The exact fault in that area. |
What to do next
- Note P26F2 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 P26F2
What does P26F2 mean?
P26F2 means "Starter Relay B Stuck On". P26F2 concerns the second starter relay, which on stop-start vehicles may engage the pinion of a tandem starter (GM) or form the second switching path of a two-relay layout (FCA Starter Control 2). It is a generic code, so it means the same on every make.
Is it safe to drive with P26F2?
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 P26F2 fail an emissions test?
Yes, it can. P26F2 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 P26F2 to fix?
Difficulty: medium. A typical repair takes 0.3 to 3 hours of work. This is a job for a workshop.
Will P26F2 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.