ECM - MIL ON/False Code 43 Set
Number: 87-73Section: 6E
Date: FEB., 1987
Subject: FALSE CODE 43
Model and Year: 1987 CELEBRITY, CAVALIER
CORSICA, BERETTA WITH 2.8L PFI ENGINE (CODE W)
TO: ALL CHEVROLET DEALERS
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.
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.
CELEBRITY
AXLE EMISSION MEM-CALS
MODEL TRANS. RATIO CALIBRATION PART NOS.
2DR/4DR AUTO-3 2.84 FED/CANADA 16072930
2DR/4DR AUTO-3 2.84 CALIFORNIA 16072942
2DR/4DR AUTO-3 3.18 FED/CANADA 16072952
2DR/4DR AUTO-3 3.18 CALIFORNIA 16072963
2DR/4DR AUTO-4 3.33 FED/CANADA 16072973
2DR/4DR AUTO-4 3.33 CALIFORNIA 16072983
WAGON AUTO-4 3.33 FED/CANADA 16073023
WAGON AUTO-4 3.33 CALIFORNIA 16073130
WAGON AUTO-3 3.18 FED/CANADA 16073003
WAGON AUTO-3 3.18 CALIFORNIA 16073013
2DR/4DR MAN-5 3.61 FEDERAL 16072993
2DR/4DR MAN-5 3.61 CALIFORNIA 16072997
WAGON MAN-5 3.61 FEDERAL 16073140
WAGON MAN-5 3.61 CALIFORNIA 16073145
CAVALIER
CONV AUTO-3 FEDERAL 16073192
CONV AUTO-3 CALIFORNIA 16073196
CONV MAN-5 FEDERAL 16073212
CONV MAN-5 CALIFORNIA 16073216
Z-24 AUTO-3 FEDERAL 16073202
Z-24 AUTO-3 CALIFORNIA 16073206
Z-24 MAN-5 FEDERAL 16073222
Z-24 MAN-5 CALIFORNIA 16073226
BERETTA G.T. ONLY
G.T. AUTO-3 3.18 FEDERAL 16073150
G.T. AUTO-3 3.18 CALIFORNIA 16073155
G.T. MAN-5 3.61 FEDERAL 16073182
G.T. MAN-5 3.61 CALIFORNIA 16073186
BERETTA/CORSICA (EXCEPT BERETTA GT)
2DR/4DR AUTO-3 3.18 FEDERAL 16073162
2DR/4DR AUTO-3 3.18 CALIFORNIA 16073166
2DR/4DR MAN-5 3.61 FEDERAL 16073172
2DR/4DR MAN-5 3.61 CALIFORNIA 16073176