P1641
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Engine fails to start.
CHECK ENGINE.
Misfiring before DTC is generated.
Fuel Pump Relay. No Voltage to Fuel Pump and O2S Preheating.
Fault symptoms
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Misfiring before DTC is generated.
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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 exceeding 10V. O2S1 and O2S2 preheating active.
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Fault criteria:
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More than 15 misfires. O2S1 and O2S2 preheating current below 10mA for more than 1.5 s.
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Dependents:
System reaction to a fault:
OK report:
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Enable criteria fulfilled and 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 electrical faults in connecting cables or in the relay.
Diagnostic tool functions related to this fault are:
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Activation of output for fuel pump relay.
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See also the description of activations under
Menu "Activation"
for more information.
Check the wiring
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Note
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Jiggle the leads and in-line connectors at various points and in different directions to detect any intermittent breaks or short circuits in the wiring. Observe the multimeter, test lamp or diagnostic tool while doing this.
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