DTC P0137 SET; MALFUNCTION INDICATOR LAMP (MIL). Buick Regal 1996

SUBJECT: DTC P0137 SET; MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED (NEW FLASH CALIBRATION)

MODELS: 1996 BUICK REGAL WITH 3800 SERIES II ENGINE (VIN K - RPO L36)

CONDITION:

SOME OWNERS MAY COMMENT THAT THE MALFUNCTION INDICATOR LAMP (SERVICE ENGINE SOON) ILLUMINATED WITH DTC P0137 SET.

CAUSE:

CURRENT DIAGNOSTIC PARAMETER FOR DTC P0137 IS TOO SENSITIVE, CAUSING GOOD O2 SENSORS TO BE REJECTED.

CORRECTION:

CONNECT A SCAN TOOL TO THE VEHICLE AND CHECK FOR DIAGNOSTIC TROUBLE CODES. IF DTC P0137 IS CURRENT OR IN HISTORY, REFLASH THE POWERTRAIN CONTROL MODULE (PCM) WITH A NEW CALIBRATION THAT REVISES THE DIAGNOSTIC PARAMETERS FOR DTC P0137. TEST DRIVE THE VEHICLE AFTERWARDS TO VERIFY THAT THE CONDITION HAS BEEN REPAIRED. IF DTC P0137 SETS AFTER REFLASHING THE PCM, THEN FOLLOW THE PROCEDURE OUTLINED IN THE SERVICE MANUAL TO CORRECT THE CONDITION. THE NEW FLASH CALIBRATION IS AVAILABLE STARTING WITH THE DECEMBER CD NUMBER 16 FROM GM SERVICE TECHNOLOGY GROUP.

IMPORTANT: DO NOT ATTEMPT TO ORDER THE CALIBRATION NUMBER FROM GMSPO. THE CALIBRATIONS ARE PROGRAMMED INTO THE VEHICLE'S PCM VIA A TECHLINE TOOL DEVICE.

MODEL CARLINE AXLE EMISSIONS CALIBRATION YEAR RATIO NUMBER

96 W 3.06 NATIONWIDE 16238514 96 W 3.06 UNLEADED EXPORT 16238524

WARRANTY INFORMATION FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION DESCRIPTION TIME J6355 PROM-REPROGRAMMING .3 FLASH E PROM

FIGURES: 0 ATTACHMENTS: 0

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.