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P1646 Diagnostic Trouble Code Discussion for March 2010

Hydraulic Cooling Fan Control Circuit Low


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Trouble Ticket Help Requests for DTC P1646
Help Request Posted
1999 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KE54Y1X
P1646: EVAP Vent Solenoid Control Circuit Malfunction. Vehicle has Code P1646 Control Vent Solenoid Circuit Problem. When Vehicle first came in we did smoke test and found fuel cap cracked. Replaced and customer drove for several weeks and about 200 miles before light came on again. Smoke test again and ran test o...
March 29, 2010
1999 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KE54Y1X
P1646: EVAP Vent Solenoid Control Circuit Malfunction. Vehicle has Code P1646 Control Vent Solenoid Circuit Problem. When Vehicle first came in we did smoke test and found fuel cap cracked. Replaced and customer drove for several weeks and about 200 miles before light came on again. Smoke test again and ran test o...
March 29, 2010