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If the check engine light does not illuminate when the key is in the "on" position, it may indicate a malfunction in the vehicle's onboard diagnostics system or a blown bulb in the dashboard. Additionally, issues with the vehicle's battery or wiring could prevent power from reaching the instrument cluster. It's also possible that the engine control unit (ECU) is not functioning properly. A diagnostic scan can help identify any underlying issues.
What else can I help you with?
Your check engine light on your 1997 ford explorer does not come on when the key is turned in the auxiliary position Mechanic says it will not pass inspection unless the light is on. How do you correc?
Your check engine light will not come on in the auxilary (accesory) position. It comes on when the key is in the on (run) position to check the warning lights just before you start the vehicle.
Can a bad muffler cause the check engine light to come on?
Your bad muffler might be part of the reason your check engine light comes on. Usually, your bad muffler causes something else to go wrong and that causes your check engine light to come on. Problems cascade.
What causes the check engine light to come on in 1994 Isuzu pickup?
Your mom.
What causes check engine light to come on 2005 dodge truck?
There are pages of causes, you need to have it checked for codes.
What causes the check gauges light to come on in an Acadia?
See related question below.
Check gauges light on Chevrolet astro van stays on?
gage of temperature go to hot position but is not hot the engine check gages light come on
What causes check engine light to come on on a 97 Isuzu rodeo?
Lots of problems could cause the light to come on. First off, check your fluid levels; second, take it to a mechanic.
What causes the check engine light to come on in a Toyota Sienna?
Low fluid levels in engine.
What causes the check engine light to come on in a 2000 crown Victoria?
Have the code read, that will tell you.
What causes check engine light to come on 1994 Mazda 626?
A problem with the emissions system.
What causes check engine light to come on after driving?
The Check Engine light comes on when the ECU detects a problem with the emissions system. Seek professional help.
What causes check engine light to come on in Honda civic?
you have a problem with your engine and and its emissions. take it to auto zone for a free check.
