TCM Power Relay Sense Circuit Low
The TCM monitors the output side of its power relay; when the sense voltage is below threshold while relay is commanded closed, this code sets.
Affected components
- Tcm relay
- Wiring harness
- Tcm
Common causes
- High likelihood: Relay failed open
- Medium likelihood: Open wiring at sense input
- 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
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.