MIL ON, Intermittent Stalling DTC 34 (MAP Sensor) Set
90chevy03Number: 90-142-8A
Section: 8A
Date: January 1990
Corporate Bulletin No.: 038101
Subject: CODE 34 AND INTERMITTENT STALL
Model and Year: 1990 W CAR WITH 2.5L (VIN CODE R) ENGINE
TO: ALL CHEVROLET DEALERS
The "Service Engine Soon" light may come on, and intermittent stalling may occur, on the 1990 Chevrolet W car with 2.5L engine (VIN code R). Code 34 will be set.
The center male terminal in the connector to the MAP sensor may be deformed (see illustration). Vehicles produced after VIN L9205990 should not have this condition.
Remove the connector to the MAP sensor and inspect the center male terminal for signs of crushing. If the terminal appears normal, use a replacement female terminal to check the male terminal for proper tension. If the tension is not correct, then replace the terminal. Part Number 12051371 contains 10 male terminals and seals.
Part is currently available from GMSPO.
Labor Operation Number: T1562
Labor Time: .3 hrs.