FALSE CODE 24 PROM AND ECM INFORMATION. Pontiac Phoenix 1982

For 1990-2009 cars

# FALSE CODE 24 PROM AND ECM INFORMATION

A CHECK ENGINE LIGHT MAY BE TURNED ON AND A CODE 24 STORED WHEN THE THROTTLE IS OPENED AND THE ROAD SPEED SENSOR CONTINUES TO READ ZERO (0) FOR FIVE (5) SECONDS. THIS CAN OCCUR UNDER CONDITIONS SUCH AS TRYING TO GET MOVING UP A STEEP INCLINE, DRIVING THE VEHICLE IN REVERSE OR WHEN AN ENGINE IS LOADED TO STALL SPEED AGAINST THE BRAKES. AS AN INTERIM 1982 PRODUCTION FIX, A NEW ECM WAS RELEASED WITH A NEW PROM THAT EXPANDED THE CODE 24 TIMER FROM FIVE (5) TO SIXTY (60) SECONDS. THE EARLY ECM PROM, AND AFTER JOB PROM ARE NOT INTERCHANGEABLE. THE FOLLOWING PART NUMBERS ARE TO BE USED TOGETHER AND NOT INTERMIXED: START OF PRODUCTION: BROADCAST CODE AAN ECM O.E.M. PART NO. 16020181 E.C.M. SERVICE PART NO. 1225500 PROM PART NO. 1225490 APPLICATION 2.8L, 125 AUTO WITH/OUT TCC SKYLARK BROADCAST CODE RS ECM O.E.M. PART NO. 16016931 E.C.M. SERVICE PART NO. 1225500 PROM PART NO. 1225519 APPLICATION 2.8L, 125C AUTO WITH TCC SKYLARK BROADCAST CODE RY ECM O.E.M. PART NO. 16016961 E.C.M. SERVICE PART NO. 1225500 PROM PART NO. 1225527 APPLICATION 2.8L HIGH/OUTPUT, 125C AUTO WITH TCC BROADCAST CODE ATC ECM O.E.M. PART NO. 16025721 E.C.M. SERVICE PART NO. N/A PROM PART NO. N/A APPLICATION 2.8L 125 AUTO WITH/OUT TCC BROADCAST CODE ATC ECM O.EM. PART NO. 16025701 E.C.M. SERVICE PART NO. 1225950 PROM PART NO. 1226012 APPLICATION 2.8L, 125C AUTO WITH TCC BROADCAST CODE ATB ECM O.EM. PART NO. 16025701 E.C.M. SERVICE PART NO. 1225950 PROM PART NO. 1226012 APPLICATION 2.8L, 125C AUTO WITH TCC BROADCAST CODE ATJ ECM O.E.M. PART NO. 16025761 E.C.M. SERVICE PART NO. 1225950 PROM PART NO. 1226015 APPLICATION 2.8L HIGH/OUTPUT 125C AUTO WITH TCC THE MIDYEAR CHANGE INCORPORATES THE CODE 24 EXPANDED TIMER CHANGE TO SIXTY (60) SECONDS.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.