Transmission Range Control B Circuit High
The B-channel actuator of the transmission range control reports a circuit high condition. Gear-selector mechanical engagement cannot be requested as expected.
Affected components
- Transmission range control actuator b
- Wiring harness
- Tcm
Common causes
- High likelihood: Control wire shorted to B+
- Medium likelihood: Open actuator coil
- Low likelihood: Connector pins corroded - high contact resistance
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
Related codes
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.