Fault Conditions

P1531

Pedal Position Sensor 1 And 2 Circuit. Adapted Sum Out Of Range.







Fault symptoms
- Limited speed.
- CHECK ENGINE.
- Incorrect idle speed.
- Cruise control inoperative.
- Starting problems, especially when engine is cold.

On-Board Diagnostics

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

Enable criteria:
- Ignition in ON position. Pedal fully released.

Fault criteria:
- The aggregate of the voltages from pedal position sensors 1 and 2 exceeds the adapted aggregate by more than 6 %.

Dependents:
- None.

System reaction to a fault:
- Fuel shut-off at engine speeds above 2200 rpm. Throttle control in limp-home. Limp-home solenoid will be activated 5 times in succession each time the ignition is switched on until the fault has been repaired and the diagnostic 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
Fault diagnosis concerns electrical faults in connecting cables or in any of the sensors.

Diagnostic tool functions related to this fault are:
- Pedal position sensor 1, in V.
- Pedal position sensor 2, in V.

For more information refer to description of read values, Menu Read Values

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.