P26DF
Sensor Power Supply D Circuit / Open
The 5 V supply rail D for sensors is open. All sensors fed from this rail report invalid readings.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Open wire on the supply railCommon
- Open inside the ECU regulator outputPossible
Parts involved
- Control Module
- Sensor Supply D
- Wiring Harness
P26DF is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.