Sensor Reference Voltage G Circuit Range/Performance
The 5 V reference G voltage is within range but unstable or offset against expected. Loose ground or marginal regulator load.
Affected components
- Control module
- Reference voltage rail
- Sensors on rail g
Common causes
- Medium likelihood: High-resistance ground for the reference rail
- Medium likelihood: One sensor draws excessive current and shifts the rail
- Low likelihood: Sensor element aged beyond calibration window
Diagnostic notes
- The malfunction indicator lamp may illuminate
Sources
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.