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P1646 Diagnostic Trouble Code Discussion for November 2011

Hydraulic Cooling Fan Control Circuit Low


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Trouble Ticket Help Requests for DTC P1646
Help Request Posted
2004 Jaguar S-Type 3.0L MIL Lamp on, stays in open loop VIN: SAJEA01T44
P1646: ho2s sensor bank 1 sensor 1. ... check engine light on. scanned w/ auto ingenuity and baum iscan and both showed code p1646(ho2s b1s1). replaced sensor with no change. found ecm is only grounding precat o2s heaters for less than 10 seconds when engine first started(engine at N O Temp). gr...
November 15, 2011
2004 Jaguar S-Type 3.0L MIL Lamp on, stays in open loop VIN: SAJEA01T44
P1646: ho2s sensor bank 1 sensor 1. ... check engine light on. scanned w/ auto ingenuity and baum iscan and both showed code p1646(ho2s b1s1). replaced sensor with no change. found ecm is only grounding precat o2s heaters for less than 10 seconds when engine first started(engine at N O Temp). gr...
November 15, 2011