P1128critical severityPowertrain
Throttle Control Motor Lock
on 2012 Toyota Matrix 2.4L I4 · FWD
What this code means
The throttle control motor is locked or unable to move the throttle plate.
Symptoms
- CEL
- Engine stuck at idle
- Limp mode
- No throttle response
Common causes
- Carbon buildup
- Mechanical obstruction
- Faulty motor
- Damaged throttle body
Diagnostic steps
- Inspect throttle plate
- Clean throttle body
- Test motor
- Check for obstructions
Repair notes
Clean or replace throttle body.
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