Transmission Range Sensor Circuit Malfunction
The transmission range sensor (PRNDL switch / inhibitor switch) signal is implausible — multiple positions active simultaneously, or no position recognized. Engine may refuse to start unless P or N is detected.
Affected components
- Transmission range sensor
- Shift linkage
Common causes
- High likelihood: Range sensor misadjusted
- Medium likelihood: Range sensor failed
Possible symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Diagnostic notes
- The malfunction indicator lamp may illuminate
- Reduced-power or limp mode may occur
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.