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Motor (P)
The dedicated SCR/reductant control module reports an internal performance fault — failed self-tests, watchdog…
The drive-by-wire throttle motor circuit is open — no current flow detected. The ECU loses authority over the …
The throttle motor responds, but its actual position does not track the commanded position within tolerance. O…
Drive voltage to the throttle motor is below the lower limit. Typically a short to ground or a failed driver s…
Drive voltage to the throttle motor is above the upper limit. Usually a short to supply or an open ground.…
The ECU has detected a fault severe enough that it forces the throttle actuator to the idle stop. The driver l…
The TAC monitor commanded an engine shutdown because throttle authority can no longer be guaranteed safely. Th…
The TAC monitor restricts maximum throttle opening as a safety response to a TAC fault. The vehicle can still …
The internal processor or watchdog of the throttle actuator control module reports an internal fault. Communic…
Self-tests within the TAC module fail their performance criteria — for example RAM/ROM checks or analog refere…
The ECU detects that the throttle position sensor A signal at the closed-throttle stop does not match the lear…
The drive circuit of throttle actuator motor B is open. Throttle B is the secondary throttle on engines with t…
Throttle actuator B motor responds electrically but does not move the throttle plate as commanded — typically …
Throttle actuator B motor drive line stuck low — short to ground. Wiring faults of this kind typically come fr…
Throttle actuator B motor drive line stuck high — short to B+. Wiring faults of this kind typically come from …
The redundant throttle or accelerator pedal position channels C and F disagree by more than the allowed tolera…
Throttle B control has detected an unsafe condition and forced an RPM limit. Common protective response when m…
The TAC monitor caps engine speed at a fixed limp-home rpm because it can no longer trust the throttle respons…
The throttle plate cannot be commanded back to the closed/idle position. Idle speed runs high or the engine ca…
The throttle plate cannot be commanded open. The engine stays at idle or stalls under load. Often caused by a …
The throttle actuator control has detected a fault and limits engine speed to a defined emergency value. The v…
The throttle actuator system has dropped engine speed below the normal limp limit because of a more serious fa…
The minimum stop calibration of throttle position sensor A is outside the expected range during the ECU self-c…
The minimum stop calibration of throttle position sensor B does not match the learned reference during ECU sel…