P1253
Read the instructions below then start the fault diagnostic procedure.
Symptom: CHECK ENGINE. Idling speed incorrect. Cruise control not working.
P1253 |
Fault symptoms
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CHECK ENGINE.
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Idling speed incorrect.
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Cruise control not working.
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On-Board Diagnostics
Type of diagnosis:- |
Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.
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Enable criteria:
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Crankshaft rotating but engine not yet started. Main relay voltage exceeding 5V.
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Fault criteria:
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Throttle motor receiving 100% PWM in opening direction.
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Dependents:
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None.
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System reaction to a fault:
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Throttle control goes into limp-home mode. The limp-home solenoid will be activated 5 times in succession each time the ignition is turned on until the fault has been rectified and the trouble codes cleared.
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OK report:
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Accelerator pedal has been depressed at some time and then fully released. 120 s has expired since then without fault criteria being fulfilled.
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Fault handling: (For more information, see .)
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CHECK ENGINE goes on immediately and can be turned off only by clearing the trouble codes.
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Diagnostic help
A mechanical or electrical fault is preventing the throttle from opening during start. Main relay voltage supplying the control module is OK.Functions in the diagnostic tool related to the fault:
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Activate output for throttle motor.
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For more information, see .