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Key On Engine Off / Cranking Bulb

Failed emissions due to Key On Engine Off / Cranking Bulb. Possible fixes?

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Posted on Jan 02, 2017

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SOURCE: failed emission test because check engine light wont come on

You have to pull the front of the dashboard off, and take out the instrument cluster to get at it. If there ia an autozone near you, have them put a code scanner on the car, that will tell what is wrong.They don't charge anything to do it, and takes about 30 seconds.

Posted on Mar 11, 2009

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SOURCE: Check engine light wont come on 2003 Blazer

may be a blown light bulb

Posted on Jul 28, 2012

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Failed emission. BMW 325 Ci. MIL CMD failed. KOER fail. What does it mean?


There is a problem with the way the engine is burning fuel also the check engine light bulb is out..In otherwords when a car is inspected and put on the analyzer. It runs tests of various systems. In your case KOER means your check engine light is supposed to come on when you crank the car and go off once the car starts. Yours never came on as a check (maybe bulb out ) or intentionally disconnected. Also your care is putting out emissions above the limit.

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Failed Emmission test


So you are saying the bulb for the check engine light is burned out and needs to be replaced ??
And the trouble codes you listed are for lean fuel mixture which could point to a vac leak or low fuel pressure.

Jan 14, 2013 | 1999 Ford Explorer

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Ok the Guy.that ran the emissions test it don't


Check the help link
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Vehicle smog test failed Due to NO MIL/check engine light?
http://schematicsdiagram.blogspot.com/2011/12/vehicle-smog-test-failed-due-to-no.html

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Dec 22, 2012 | Cars & Trucks

1 Answer

Check engine light was changed now doesnt go on at all


When you turn the key to the "on" position (engine not running), does it come on??? if not, replace bulb again...or test the light socket for electrical signal...

Jul 30, 2012 | 1997 GMC Sierra

3 Answers

They change an sensor on my 2003 suburban 1500 and this fixed the check engine light status. However they must of done something or not hooked something back up, since now the check engine light does not...


When you turn the key 'on' the Check Engine Light is supposed to illuminate-that is also a check for the system-they probably removed the CEL bulb or the fuse for it-not good, and easy enough to verify-if so I would register a complaint to any state agency that regulates auto repair or emission stations. A disabled CEL will not in and of itself cause a failure in most states,but a code will-You will need to have the car scanned to see what the code is, and then come back on here with the actual code for help.

May 23, 2011 | 2003 Chevrolet Suburban 1500

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2001 Toyota MR2 Spyder. In Maryland, you have to do emissions. The first time it failed because I needed to replace an 02 sensor. When it went back, it failed because my check engine light bulb was out....


When you first put the key and turn it to ignition, all of your dash lights should light. That is how you check your lights. It is not an easy thing to replace. The dash lights are replaced as a unit. Check with your local auto shop for the part or you Toyota dealer.

Dec 10, 2017 | 2001 Toyota MR2 Spyder

1 Answer

I just had my emission test done and it failed for the service engine soon light not turning on. What could the problem be and how can i fix it?


it is supposed to turn on when you turn on the key so you can verify the bulb is ok. If it is not turning on, the most common cause is just a bad bulb. easy to replace, just pull the 2 screws above the gauges, pull off the fascia and then pull the 4 T-15 torx screws that hold in the gauge cluster, the bulbs come out from the back. if this does not fix it, the next most likely cause is the ignition switch, it may not be energizing the "bulb check" wire.

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