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P1646 Diagnostic Trouble Code Discussion for February 2008

Hydraulic Cooling Fan Control Circuit Low

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Trouble Ticket Help Requests for DTC P1646
Help Request Posted
2002 Jaguar XKR 4.0L MIL Lamp on VIN: SAJDA42B32
P1646: fuel pump relay malfunction. ... tested power supply from fuse hot at all times checked ignition power- good - checked fuel pump #2 operation -it works- signal from computer is getting to relay if i clear code and restart vehicle after 5 seconds light comes on with the same code p1646 fue...
February 15, 2008