Possible causes – Weak battery– Faulty Transmission Control Module (TCM)– Harness is open or shorted between (TCM) and Engine Control Module (ECM)– Poor circuit electrical connection between (TCM) and (ECM) When is the code detected? Malfunction is detected when an
Possible causes – Weak battery– Faulty Transmission Control Module (TCM)– Harness is open or shorted between (TCM) and Engine Control Module (ECM)– Poor circuit electrical connection between (TCM) and (ECM) Tech notes There is a service bulletin for the 2001
When is the code detected? P1605 indicates a problem with the chassis acceleration sensor.
Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1605 Information for specific makes P1605 BUICKP1605 CADILLACP1605 CHEVROLETP1605 FORDP1605 GMCP1605 HYUNDAIP1605 LEXUSP1605 TOYOTAP1605 INFINITIP1605 NISSAN
P1605 CHEVROLET – Loss of HVAC Serial Data
P1605 FORD – PCM Keep Alive Memory Test Error
P1605 GMC – Loss of HVAC Serial Data
P1605 LEXUS – Knock Control CPU Malfunction
P1605 TOYOTA – Knock Control CPU Fault
P1605 BUICK – Loss OF HVAX Serial Data
P1605 CADILLAC – Loss OF HVAX Serial Data