P26A1Exhaust Aftertreatment Glow Plug Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P26A1 describes a load circuit of the exhaust glow plug that reads too low: the feed or the element has found a path to ground, so the current bypasses the heater or exceeds what the circuit allows. Shorted elements, insulation damage at the hot plug body and wiring melted against the exhaust are the expected causes; a fuse in the glow plug feed may blow repeatedly. No manufacturer documents this code publicly. Ford's 3.2 L Transit, which uses the neighboring codes for its vaporizer glow plug, files a grounded control line under P269D instead. CARB's output component rules call for detection of such circuit faults on emission-related heaters. The vaporizer cannot heat, so exhaust dosing and filter regeneration are restricted.
- What you may notice
- MIL on
- Fuse for the glow plug circuit blows again after replacement
- Regeneration blocked
- Likely causes
- LikelyGlow element shorted to its housing
- PossibleFeed wire melted or chafed against the exhaust
- RareFuse blown as a result of the short
- 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: €60 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.