I have a 2000 Toyota Camry that has a unique problem. The Check Engine light NEVER comes on even when first starting the car. I have access to a scanner and know that the car periodically throws a catalyst code but the light never comes on. I just assumed that the bulb was burned out. Today whil…

I thought maybe it might be covered, so when I had the cluster out and removed the bulb I was able to very clearly see the symbol with daylight shining through. I know of that trick and thought that might have been an issue. But no. Although here in Virginia we don’t have emissions tests we do ha…

When turning the ignition switch to the run position the Check Engine light should come on. This is called the self-test mode for the computer. If the Check Engine light doesn’t come on in the run position it means the computer failed the self-test mode and there’s a problem with the computer. Test…

When it comes time to sell your car, this feature is worth paying EXTRA for…

Caddyman, you certainly are full of useful and insightful wisdom aren’t you

Thanks Tester for the useful knowledge! Very much appreciated!!!

You need to find out which pin on the connector to the engine computer is for the CEL. Then check for continuity from the lamp socket to the computer connector. Also one pin of the lamp socket goes to ground, check this continuity too. If all that checks out then it’s a problem in the computer mo…

Like others have already stated, the CEL light is usually turned on through the ECU which probably makes a ground connection inside the unit to turn on the lamp. You can check to see if there is voltage on the lamp lead going to the ECU. If there is about 12 volts on it you should be able to ground …

Well, well, well, well,…(think ‘A Clockwork Orange’), well, well, well! I have an '05 Camry that has a CEL that never shuts off. I can change the oil and a day or two later, it never fails to come right back on. A knod for consistency. I’ve had it for six years now without any other noteworthy i…

Thanks guys. the warning lights on a 2000 are right on the circuit board for the cluster and don’t have seperate sockets with leads on them. One day when i am feeling adventurous again I will pull it out again and check for continuity with my tester and check the ecu as well. The scanner i have a…

Check engine light NEVER comes on

Maintenance/Repairs

cigroller February 13, 2012, 8:27am 9

Of course, there’s also the small matter of wires. Those things in between the computer and the lightbulb.

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Check engine light NEVER comes on

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