P2108 Throttle actuator: reading or operation not right (control module)
P2108 means: Throttle actuator: reading or operation not right (control module). The electronic throttle opens and closes the air path into the engine. Drive gently and have the car checked soon. The most common repair costs about €90–180 in Estonia, depending on make and model.
What it means
The electronic throttle opens and closes the air path into the engine. The computer found that it doesn't move as commanded and often puts the car in limp mode. There is a signal, but the reading or operation isn't plausible. The cause may be the part itself or a real mechanical fault.
What you may notice
- Engine light on
- Limp mode
- The engine doesn't respond to the pedal properly
- Idle too high or too low
What could be wrong
- 1Throttle body clogged with carbon · Throttle body clean or replace €90–180
- 2Worn throttle motor or sensor · Throttle body clean or replace €90–180
- 3Corroded connector · Wiring or connector repair €45–90
- 4Low battery voltage · Battery replacement €120–220
Repair difficulty: Moderate
What you can check yourself
Check whether the throttle body is dirty inside. After cleaning, the throttle has to be relearned with a diagnostic tool. You can check the simple things yourself, but the repair is best done in a workshop.
How we fix it
- We clean the throttle body and relearn it
- We check the connector and wiring
- We replace the throttle body if it's worn
Standard SAE description: Throttle Actuator Control Module Performance