Cutlass L4-138 2.3L VIN A FI HP (1990)
Knock Sensor: Customer Interest
MIL ON, DTC 43 (ESC Circuit) Set
NUMBER:
90-T-209
CORP.REF.NO.: 138114R
DATE:
December 1991
SECTION:
6E3
SUBJECT:
SERVICE ENGINE SOON LIGHT MAY SET CODE 43
- REPLACE TERMINAL
MODELS/YEARS:
1990 CUTLASS SUPREME
W/2.3L (VIN D) ENGINE
CONDITION: The "Service Engine Soon" light may come on and set a Code 43, on 1990 Cutlass Supremes with 2.3L (VIN D) engine. The cars may
have decreased performance when the code is set.
CAUSE:
The terminal in the connector to the spark knock sensor may be improperly formed. This condition is limited to early built 1990 models.
CORRECTION:
Remove the connector from the spark knock sensor and inspect the male terminal in the connector. If the terminal appears normal, use
a replacement female terminal to check for proper tension. If the tension is not normal (the female terminal falls out when held
upside-down), or if the terminal appears to be flattened, replace the terminal and seal. P/N 12121037 contains both the terminal and
seal and is currently available from GMSPO.
