P262C
Sensor Reference Voltage G Circuit / Open
The 5 V reference G output that the engine controller supplies to a group of sensors is open. All sensors fed from this rail will 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 reference railCommon
- Open inside the ECU reference outputPossible
Parts involved
- Control Module
- Reference Voltage Rail
- Wiring Harness
P262C 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.