P1264
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Engine stalls.
CHECK ENGINE.
Incorrect idling speed, too low.
Cruise control not working.
Starting problems, especially when engine is cold.
Limited speed.
Throttle Open when Pedal is Released.
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Note
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The throttle disc cannot be closed fully.
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Fault symptom
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Incorrect idling speed, too low.
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Cruise control not working.
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Starting problems, especially when engine is cold.
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On-Board Diagnostics
Type of diagnosis:
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Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.
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Enable criteria:
(Conditions that must be fulfilled before the diagnosis can be performed.)
Fault criteria:
(After enable criteria have been fulfilled, the diagnosis checks whether fault criteria are fulfilled.)
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Throttle position exceeds the maximum allowed when pedal is released.
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Dependents:
(Occasionally after fault criteria have been fulfilled, a number of other diagnostics must report OK before the trouble code can finally be generated.)
System reaction to a fault:
(After fault criteria have been fulfilled, certain measures will occasionally be taken.)
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Engine speed limited to 2 200 rpm.
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Fuel shut-off. Main relay turned off. Throttle control in limp-home mode. Limp-home solenoid will activate 5 times in succession each time the ignition is turned on until the fault is rectified and the trouble codes cleared.
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OK report:
(The diagnosis can be included as a dependent for another diagnosis and must therefore report OK even if it is continuous. The OK report is also used in fault handling to decrement the fault counter.)
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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:
(See “Fault diagnosis, general” for more information.)
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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
When the DTC is generated, the engine stalls. The next time the engine is started, engine speed is limited to 2 200 rpm.
The throttle has been open in spite of the driver having released the accelerator. A mechanical fault is preventing the throttle from closing.
Checking the wiring
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Observe the multimeter, diagnostic tool or test lamp during the check.
