Tercel 92, Engine Light On!

"bumbum" wrote in news:Dw4ff.21918$ snipped-for-privacy@newssvr25.news.prodigy.net:

NO idea without knowing the code that's been set.

Locate the black DIAG connector under the hood (probably at top near firewall, driver's side). Pop the cover, and short the T and E1 terminals with a paper clip. Count the blinks of the Check Engine light. May be long and short blinks, and may be more than one sequence.

Report back here.

The MOST likely cause is a loose gas cap. Take it somewhere where they will read the codes for you. That way you will know.

---MIKE---

The butler did it.

Rather than chase a hundred different guesses, you would be much better off pulling the code and starting from there. BTW, my guess is a bad O2 sensor.

---MIKE---

A 1992 Tercel does not have an OBD II system that detects fuel tank pressure or a loose gas cap.

Wouldn't a loose gas cap trigger a code anyway? Or does it depend on the car? I'm sure my father once said to me that it happened with his '94 Pontiac Grand Prix, which I am reasonably sure was OBD-I.

OBD II was the first system to use SAE standards that specified what systems are monitored as well as standard codes for every manufacturer. This system allows the use of a universal code scanner.

Prior to OBD II, manufacturers had proprietary systems, which is why scan tools were specific for each brand. It is possible that GM monitored fuel tank pressure.

There is no trouble code for fuel tank pressure for a TCCS (Toyota's OBD I) system, and in any event, I have never heard of a loose fuel cap causing a check engine light in any Toyota prior to the advent of OBD II.

"Ray O" wrote in news:17eb1$437ce143$44a4a10d$ snipped-for-privacy@msgid.meganewsservers.com:

I think it was Mrs. Smitherwick, myself. She was angry because the butler was committing indecent acts with the carriage horse and Lord Postlethwaite (at the same time, no less).