P0506
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE.
Low idling speed.
Idle Speed Control. Idling Speed too Low.
Fault symptoms
On-Board Diagnostics
Type of diagnosis:
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Continuous. However, it is interrupted once the fault criteria have been fulfilled and does not restart until the next driving cycle.
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Enable criteria:
(Conditions that must be fulfilled for diagnostics to be performed.)
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Global conditions for this diagnostic trouble code: When starting the engine, the atmospheric pressure must exceed 78 kPa and the temperature of the coolant and the intake air must exceed -7°C.
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Engine running. Car stationary. Accelerator pedal fully released. Engine load lower than 225 mg/c. Idle speed control requests greatest possible air mass per combustion.
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Fault criteria:
(When enable criteria have been fulfilled, diagnostics will check if the fault criteria have been fulfilled.)
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Engine speed is more than 100 rpm lower than the requested idling speed for 5s.
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Dependents:
(Once fault criteria have been fulfilled, a number of other diagnostics must report OK before the diagnostic trouble code can finally be generated.)
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P0501, P0502, P1230, P1530, P1531 and P1532.
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System reaction to a fault:
(Once the fault criteria have been fulfilled, certain measures will sometimes be taken.)
OK report:
(This diagnosis may be included as a dependent to another diagnosis and must therefore report OK even if it is continuous. The OK report is also used in fault handling to count down the fault counter.)
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Diagnosis performed once and fault criteria not fulfilled.
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Fault handling:
(Refer to section “Fault diagnosis, general” for more information.)
Diagnostic help
If other diagnostic trouble codes are generated, check whether to start fault diagnosis with any of them. Then check if the throttle is in limp-home mode.
Diagnostic tool functions related to this fault:
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Diagnostic status for the diagnosis.
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Idle speed control, unit ON/OFF.
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Idle speed deviation, unit rpm.
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Refer also to the description of readings under ”Fault diagnosis, general” for more information
