Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P1641 Information for specific makes

P1641 BUICK
P1641 DODGE
P1641 FORD
P1641 HONDA
P1641 HYUNDAI
P1641 CHEVROLET
P1641 CADILLAC
P1641 GMC
P1641 PONTIAC
P1641 SATURN