OBD-II code · Powertrain (generic, extended)
P26E1 Sensor Power Supply D Circuit High
The 5 V supply rail D is above the expected level. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with P26E1?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyReference wire shorted to a B+ supply
- PossibleInternal 5 V regulator failed
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Control Module, Sensor Supply D, Wiring Harness
Related codes
- P06B2Sensor Power Supply A Circuit High
- P06B5Sensor Power Supply B Circuit High
- P06E8Sensor Power Supply C Circuit High
- P26DEEngine Sound Control A Circuit Performance
- P26DFSensor Power Supply D Circuit / Open
- P26E0Sensor Power Supply D Circuit Low
- P26E2Fuel Mode Indicator Lamp Control Circuit Low
- P26E3Fuel Mode Indicator Lamp Control Circuit High
- P26E4Starter Relay B Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.