P0444
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE.
Possible smell of petrol or misfiring.
EVAP Purge Valve Circuit. Open / Short to Ground
Fault symptoms
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Possible smell of petrol or misfiring.
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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:
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Engine running. Main relay voltage 10 V-16 V. Output not active.
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Fault criteria:
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Voltage on output is below 2 V when the valve should have closed and the PWM signal should be high (purge valve normally open). Condition fulfilled within 10 periods that must occur within 60 sec. (It normally takes approx. 1 sec. to generate a DTC.)
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Dependents:
System reaction to a fault:
OK report:
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Enable criteria fulfilled. Fault criteria not fulfilled within 60 s.
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Fault handling:
(See section
Fault handling III, other emission-related components and functions
for more information.)
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 under
Menu "Activation"
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.