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Maintenance Manual for Chery·Windcloud Marelli EFI System
C. Check spark plug to see if clearance is proper; too high; E. Check intake conduit to see if it is worn out, etc. No Diagnosis
Failure: too high circuit voltage of upstream oxygen sensor Step Operation Result Solution 1 Connect scanner and commutator, and then turn
Go to next step Yes Diagnosis 2 Start engine and idle it until coolant temperature is No Go to next step Yes Repair or 3 Check respectively the connections between Pin 20 No Diagnosis
Failure: signal error of upstream oxygen sensor
Step Operation Result Solution 1 Connect scanner and commutator, and then turn
Go to next step Yes Diagnosis 2 Start engine and idle it until coolant temperature is No Go to next step Yes Repair or 3 Check respectively the connections between Pin 20 No Diagnosis
Failure: heating circuit error of upstream oxygen sensor Step Operation Result Solution 1 Connect scanner and commutator, and then turn
Go to next step
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