P1658
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE goes on after two driving cycles.
Possible noise when pedal released.
Charge Air Bypass Valve Circuit. Open / Short to Ground.
Fault symptoms
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CHECK ENGINE goes on after two driving cycles.
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Possible noise when pedal released.
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Conditions
The following conditions apply for this DTC:
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Engine running and main relay voltage exceeding 10 V.
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Output voltage below 2 V when output is inactive.
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Condition fulfilled for 1 sec.
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Diagnostic help
Fault diagnosis concerns an electrical fault in the connecting leads or in the valve.
Functions in the diagnostic tool related to the fault:
See also the description of activations,
, for more information.
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.
