INFO. ON DTC MIL P0452 (FUEL TANK PRES. SENSOR). Buick Regal 1997

THIS IS A MONTHLY SERVICE NEWSLETTER ARTICLE. THIS BULLETIN IS NOT INTENDED FOR PUBLICATION.

SUBJECT: INFORMATION ON DTC MIL P0452 (FUEL TANK PRESSURE SENSOR) OR P1639 (5V REFERENCE CIRCUIT)

MODELS: 1997- 98 BUICK CENTURY

IF A 1997 OR 1998 CENTURY HAS A MULTIFUNCTION INDICATOR LIGHT ON AND A DTC P0452 OR P1639, CHECK CIRCUIT #474 (GRAY WIRE) NEAR THE TRANSAXLE VACUUM MODULATOR. THE WIRE MAY HAVE COME OUT OF THE PROTECTIVE CONDUIT AND SHORTED TO GROUND ON THE TRANSAXLE. THIS CIRCUIT PROVIDES THE 5V REFERENCE TO THE A/C PRESSURE TRANSDUCER AND FUEL TANK PRESSURE SENSOR.

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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.