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Service bulletin 971212EG006

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 id54455
Published by NHTSA1998-04-07
Manufacturer's number971212EG006
Manufacturer's date1997-12-12
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:GASOLINE

NHTSA's summary

ENGINE CONTROL MODULE (ECM) LOGIC HAS BEEN REVISED TO PREVENT UNNECESSARY M.I.L "ON" CONDITIONS AT HIGH ALTITUDES WITH DIAGNOSTIC TROUBLE CODES (DTC) PO130 AND P0133, ON VEHICLES OPERATING AT HIGH ALTITUDES. *YC

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

Trouble codes named

P0133

Vehicles listed
TOYOTA TERCEL1995, 1996
TOYOTA TOYOTA1995

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

Other bulletins for the same vehicles and component
T-TT-0010-10 Rev2018-04-02. Service bulletin. Tech Tip: Low battery voltage can contribute to a MIL "ON" condition for P0335 (Crankshaft Position Sensor Circuit) and/or P0340 (Camshaft Position Sensor Circuit) due to inconsistent rotational speed of the engine's crankshaft.
TC010292002-02-06. Service bulletin. SUBJECT REGARDING ENGINE HARD TO START. *YD
TC970011997-07-17. Service bulletin. ADDITION TO TECHNICAL INSTRUCTIONS FOR SSC T04. *JD