P1641
Symptom: Engine will not start.
Misfiring before trouble code generated.
Fuel Pump Relay. No Voltage to Fuel Pump and O2S Preheating.
Fault symptoms
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Misfiring before trouble code generated.
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Conditions
The following conditions apply for this DTC:
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Crankshaft rotating and engine misfiring.
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Diagnostic help
Fault diagnosis concerns electrical fault in connecting leads or in the relay.
Functions in the diagnostic tool related to the fault:
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Activate fuel pump relay output.
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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.
