For 1990-2009 cars

# SMU - SECTION 6E - ENGINE CONTROLS - REVISED DTC P0121

#### SUBJECT: SERVICE MANUAL UPDATE-SECTION 6E-ENGINE CONTROLS REVISED DTC P0121 DIAGNOSTIC SUPPORT INFORMATION

#### MODELS: 1997 BUICK LESABRE, PARK AVENUE, RIVIERA, SKYLARK 1997 CHEVROLET CAMARO, LUMINA, MONTE CARLO, VENTURE 1997 OLDSMOBILE ACHIEVA, CUTLASS SUPREME, EIGHTY EIGHT, LSS, REGENCY, SILHOUETTE 1997 PONTIAC BONNEVILLE, FIREBIRD, GRAND AM, TRANS SPORT WITH 3.1L, 3.4L AND 3.8L ENGINES (VINS 1, E, K, M, X - RPOS L36, L67, L82, LA1, LQ1)

THIS BULLETIN IS BEING ISSUED TO REVISED THE DTC P0121 - TP SENSOR PERFORMANCE DIAGNOSTIC SUPPORT INFORMATION IN ENGINE CONTROLS, SECTION 6E. THE DTC P0121 DIAGNOSTIC CHECKS FOR A HIGH TP SENSOR SIGNAL CONDITION DURING LOW MAP SIGNAL SITUATIONS AND A LOW TP SENSOR CONDITION DURING HIGH MAP SIGNAL SITUATIONS. THIS BULLETIN INCLUDES ADDITIONAL INFORMATION REQUIRED TO IDENTIFY AND DIAGNOSE A LOW TP SENSOR SIGNAL CONDITION.

FIGURES: 00 ATTACHMENTS: 02

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 1996 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.