P2111

Throttle Actuator Control System - Stuck Open

Severity: Critical
Driving: Stop driving

The throttle plate is stuck open. The module commanded it closed and it did not close. Carbon seizing the plate is the usual reason, and the practical effect is an engine that keeps delivering power when you lift off - a high idle at best, and at worst a car that does not slow as you expect.

Possible causes

CommonCarbon seizing the throttle plate in its bore
CommonBroken or weak throttle return spring
CommonFailed throttle actuator motor jammed in position
PossibleForeign object in the throttle body
PossibleDamaged throttle body after previous cleaning

What you might notice

Engine speed staying high when you lift off
Car not slowing as expected
High or racing idle
Reduced power mode
Engine not returning to idle

What to check, in order

Stop somewhere safe. A throttle that does not close is the one throttle fault that can make the car behave in a way the driver did not ask for.
If the engine will not return to idle while you are moving, brake firmly, select neutral, and bring the car to a stop. Do not switch the ignition fully off while moving - that can lock the steering.
Remove and inspect the throttle body once stopped. Carbon around the plate and a weak return spring are the two things to look for.
Check nothing has been left in the intake after previous work.
Run the throttle relearn procedure after any cleaning or replacement.

Read this code from your own car

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Where this code sits

B · Body C · Chassis P · Powertrain U · Network and communication