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Service bulletin 99070

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id6089158
Published by NHTSA2000-01-13
Manufacturer's number99070
Manufacturer's date1999-10-01
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL

NHTSA's summary

VOLUNTARY EMISSION CAMPAIGN FOR VEHICLES WITH AN OBD-II CALIBRATION THAT CAUSES A FALSE OXYGEN SENSOR CODE, P1133, TO SET UNDER CERTAIN CONDITIONS, RESULTING IN MALFUNCTION INDICATOR LAMP ILLUMINATION. *TT

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine, Exhaust and emissions

Trouble codes named

P1133

Vehicles listed
BUICK LESABRE1999
PONTIAC BONNEVILLE1999

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20032832003-11-12. Engine
19991281999-06-28. Emissions

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
1300890092023-12-11. Service bulletin. Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
0406010212005-02-15. Service bulletin. NEW REAR MAIN SEAL AND SPECIAL TOOL FOR INSTALLATION. *TT
0406050082005-02-14. Service bulletin. AVAILABILITY OF EXHAUST MUFFLER FOR SERVICE. *TT
31802004-12-15. Service bulletin. DEALERS MAY COMMENT ON A CHUGGLE, SURGE, MISFIRE CONDITION. *TT
31152004-11-03. Service bulletin. ENGINE INTAKE MANIFOLD COOLANT LEAK. *SC
0406010172004-08-02. Service bulletin. NEW UPPER INTAKE MANIFOLD AND GASKET KITS. *TT
010601008A2002-10-09. Service bulletin. SOME OWNERS MAY COMMENT ON A REPEAT ENGINE OIL PAN LEAK. *TT
0106010082001-05-17. Service bulletin. SOME OWNERS MAY COMMENT ON A REPEAT ENGINE OIL PAN LEAK. *TT
0106010072001-05-17. Service bulletin. ENGINE COOLANT CONSUMPTION OR COOLANT LEAK (INSPECT FOR MATERIAL DEGRADATION/REPLACE INTAKE MANIFOLDS) *TT UPDATED 11/02/07 *NJ