P1191
Electronic Throttle System Limp Home Valve On
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–89 (est.)
Symptoms
- Reduced engine power
- Unstable engine idling
- Check Engine light comes on
- Engine speed limit
- Acceleration problems
Causes
- Throttle Position Sensor Malfunction
- Problems with the throttle motor
- Open or short circuit in control circuit
- Throttle valve contamination
- Engine control unit (ECU) malfunction
How to Fix
- Check throttle position sensor
- Check the throttle motor
- Check the integrity of the wiring harness and connections
- Clean throttle body
- Check and, if necessary, replace the engine control unit