Fault Conditions

P1264

Throttle Open When Pedal Is Released.










NOTE: The throttle disc cannot be closed fully.

Fault symptoms
- Engine stalls.
- CHECK ENGINE.
- Incorrect idling speed, too low
- Cruise control inoperative.
- Starting problems, especially when engine is cold.
- Limited speed.

NOTE: See also "fault diagnosis, fault symptoms - DTC P1264 generated without actual fault".

On-Board Diagnostics

Type of diagnosis:
- Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.

Enable criteria:
- Engine running.

Fault criteria:
- Throttle position exceeds the maximum allowed when pedal is released.

Dependents:
- None.

System reaction to a fault:
- Engine speed limited to 2200 rpm.
- Fuel shut-off. Main relay turned off. Throttle control in limp-home mode. Limphome solenoid will activate 5 times in succession each time the ignition is turned on until the fault is rectified and the trouble codes cleared.

OK report:
- Accelerator pedal has been depressed at some time and then fully released. 120 s has expired since then without fault criteria being fulfilled.

Fault Handling: (For more information refer to "Fault diagnosis, general". Description of On-Board Diagnostics)

- CHECK ENGINE goes on immediately and can be turned off only by clearing the trouble codes.

Diagnostic help
When the DTC is generated, the engine stalls. The next time the engine is started, engine speed is limited to 2200 rpm.

The throttle has been open in spite of the driver having released the accelerator. A mechanical fault is preventing the throttle from closing.

Check the wiring
Jiggle the leads and in-line connectors at various points and in different directions to detect any intermittent breaks or short circuits in the wiring. Observe the multimeter, test lamp or diagnostic tool while doing this.