P26A2 code meaning
Exhaust Aftertreatment Glow Plug Circuit High
Powertrain system Generic code P26xx codes Check engine light
What P26A2 means
The high case of the exhaust glow plug load circuit is set when the monitored point sits too close to supply voltage. Depending on how the module measures, this means the heater circuit is shorted to another positive feed or the element draws almost no current, so the voltage barely drops across it. The plug then stays cold or cannot be switched off. Public manufacturer data for P26A2 are lacking. The known user of the neighboring glow plug codes, the Ford Transit 3.2 L diesel, reports a high reading on its vaporizer glow plug control circuit as P269E. CARB treats such heaters as output components that must be monitored for circuit faults. Expect a lit MIL and limited particulate filter regeneration until the circuit is repaired.
P26A2 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P26A2
- MIL on
- Exhaust dosing and regeneration limited
Common causes of P26A2
- Most likelyGlow plug feed shorted to another battery-fed circuit
- PossibleElement with greatly increased resistance near the end of its life
- Less likelyGlow plug relay contacts stuck closed
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Aftertreatment glow plug
What each part of P26A2 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. |
| A2 | The exact fault in that area. |
What to do next
- Note P26A2 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 P26A2
What does P26A2 mean?
P26A2 means "Exhaust Aftertreatment Glow Plug Circuit High". The high case of the exhaust glow plug load circuit is set when the monitored point sits too close to supply voltage. It is a generic code, so it means the same on every make.
Is it safe to drive with P26A2?
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 P26A2 fail an emissions test?
Yes, it can. P26A2 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 P26A2 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. This is a job for a workshop.
Will P26A2 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.