P262D — Sensor Reference Voltage G Circuit Low
The 5 V reference G voltage is below the expected level. Usually a short to ground or excessive load from a downstream sensor pulling the rail down.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Control module
- Reference voltage rail
- Sensors on rail g
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- Reference wire shorted to ground
- Sensor on the rail shorted internally to ground
- Connector pins corroded - high contact resistance
Diagnostic notes
- The malfunction indicator lamp may illuminate
Related codes
Sources
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.