P262E
Sensor Reference Voltage G Circuit High
The 5 V reference G voltage is above the expected level. Typical causes are a short to battery or an internal regulator failure.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Reference wire shorted to a B+ supplyCommon
- Internal 5 V regulator failedPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Control Module
- Reference Voltage Rail
- Wiring Harness
P262E 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.