Century V6-173 2.8L VIN W FI (1987)
PROM - Programmable Read Only Memory: Customer Interest
PROM - MIL ON/False Code 43
Bulletin 87-6E-10
Date
Feb. '87
Ret. No. 87-077-6E
Corp. Ref. No. 736505
SUBJECT:
FALSE CODE 43
MODELS AFFECTED: 1987 CENTURYS WITH LB6 2.8L MPFI V6 ENGINE (VIN CODE W)
Some 1987 Centurys equipped with the LB6 2.8L MPFI V6 engine (VIN Code W) may set a false code 43. The false code will be set under a deep, part
throttle acceleration between 3400 and 4400 engine rpm. The "Service Engine Soon" light will come on and generally stay on until the ignition is turned
off. A code 43 will be stored.
If normal diagnostic procedures, as found in the 1987 Buick Chassis Service Manual, Section 6E3, (for faulty knock sensor, "intermittents", faulty
connections, or open or shorted wiring) don't correct the problem, a new Mem-Cal must be installed as per the following chart:
EMISSION
MEM-CAL
MODEL
TRANS.
TRANSAXLE
CALIBRATION
PART NUMBERS
Coupe/Sedan
Auto-3
2.84
Federal
16072936
Coupe/Sedan
Auto-3
3.18
Federal
16072957
Coupe/Sedan
Auto-4
3.33
Federal
16072977
Coupe/Sedan
Auto-3
2.84
California
16072946
Coupe/Sedan
Auto-3
3.18
California
16072967
Coupe/Sedan
Auto-4
3.33
California
16072987
Wagon
Auto-3
3.18
Federal
16073007
Auto-4
3.33
Federal
16073027
Wagon
Auto-3
3.18
California
16073017
Auto-4
3.33
California
16073135
WARRANTY INFORMATION
Labor Operation Number:
J6364
Labor Time:
0.7 Hrs.
Trouble Code:
92
