EXPERTEC TSB (87-73)

EXPERTEC TSB

TECHNICAL SERVICE BULLETIN

FALSE CODE 43 SET - NEW SERVICE PROM P/N'S

Model(s): 1987 Chevrolet Celebrity, Cavalier, Corsica, Beretta with 2.8L PFI Engine (Code W)

Bulletin No.: Chevrolet 87-73

Date: 02/04/1987

SERVICE INFORMATION

Some 1987 Celebrity, Cavalier, Corsica, and Beretta models equipped with the 2.8L PFI engine may set a false code 43. The false code will be set under a deep, part throttle crowd between 3400 and 4400 engine RPM. As a result of setting this code, the "service engine soon" light will come on and generally will stay on until the ignition key is turned off. A Code 43 will be stored.

To service customer complaints, perform service diagnosis for Code 43 as defined in the Service Manual, Section 6E3, to correct any of the following conditions: faulty knock sensor, "intermittents", faulty connections, or open or shorted wiring problems.

PARTS INFORMATION

To correct the Mem-Cal, a new part number Mem-Cal will be required.

The part numbers and model applications are listed on the reverse side of this bulletin.