Internal Control Module Transmission Speed Sensor Performance
The internal speed sensor processing logic in the transmission control module produces implausible results.
Affected components
- Tcm
- Speed sensors
Common causes
- High likelihood: Internal software logic fault
- Medium likelihood: Aged input capture circuitry drifts
- Low likelihood: Sensor element aged beyond calibration window
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
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.