For 1990-2009 cars

# SMU - SECTION 6E3 - REVISED DTC PO123 CHART

#### SUBJECT: SERVICE MANUAL UPDATE - SECTION 6E3 - REVISED DTC P0123 CHART

#### MODELS: 1994 BUICK REGAL, LESABRE, PARK AVENUE 1994 CHEVROLET LUMINA APV 1994 OLDSMOBILE EIGHTY EIGHT, NINETY EIGHT, SILHOUETTE 1994 PONTIAC BONNEVILLE, TRANS SPORT WITH 3800 ENGINE (VINS 1, L - RPOS L67, L27)

THIS BULLETIN UPDATES THE DTC P0123 (TP) SENSOR CIRCUIT (SIGNAL VOLTAGE HIGH) CHART. THE REVISED CHART ADDRESSES THE POSSIBILITY OF A FAULTY EGR VALVE INDUCING BATTERY VOLTAGE INTO THE PCM ON THE EGR 5V REFERENCE (CKT 474).

FIGURES: 0 ATTACHMENTS: 1

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.

COPYRIGHT 1994 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.