Engine Controls - Flickering Service Engine Soon/Code 44
Bulletin 85-6E-20Date
Aug.. '85
Ref. No. 85-276-6E
SUBJECT: FLICKERING "SERVICE ENGINE SOON" LIGHT AND/OR TROUBLE CODE 44
MODELS AFFECTED: 1985 CENTURYS EQUIPPED WITH 3.8L MFI ENGINES (VIN CODE 3)
A flickering "Service Engine Soon" light and/or a stored trouble code 44 (lean exhaust indication) may be caused by the oxygen sensor wire being pinched between the engine block and the power steering pump bracket. A scan tool could indicate this condition with a zero (mv) oxygen sensor reading while the "Service Engine Soon" light is flickering.
If this condition is experienced, separate the oxygen sensor lead wire from the main harness electrical conduit as necessary, and repair the wire using procedures described in Section 8A of the Buick Chassis Service Manual.