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No lights on dash, but fail emission test - 2000 Saturn SL

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  • Saturn Master
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You need to have the computer scanned to see what is happening with the emissions. You may have a vehicle in a poor state of tune or have 1 or more sensors not operating at par. A scan will show a technician where to look for a problem

Posted on Apr 25, 2015

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1 Answer

2004 mustang no check engine lite fail emissions


Unlikely the light itself In the dash is burnt, maybe the harness to the light is disconnected or the wire has been cut.

Mar 11, 2016 | Cars & Trucks

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2004 porsche cayenne i reset computer and now it will not start


Clearing Codes, clears all data, then all the emission
monitors have to run again, or you won't be excepted
to inspection

Clearing codes & data,has nothing to do with diagnosing
why you got the fault codes & fixing the problems

How would clearing a dash light help pass inspection?

Before you got down the street two houses, the light would
be back,the car has a failed system ,thus the light on the
dash after the motor is started.

You cleared all data,now a shop can't even work on it
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Flat bed it to a shop & they will make the repairs you neglected
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Need to study OBD 2 Systems on the internet & leave the vehicle
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What does it mean when the emissions warning light is on?


Any dash light that is on after the motor starts,
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Probably not a cheap fix.
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I have a 1995 mercury sable 3.0 and it failed smog due to the engine light on the dash board .I took apert the dash board light is ok ,But when I turn the key on the light will light up .But then when I...


It would help to know the state you're located,
Usually the smog test report will provide a brief reason for any failures. If not, the technician or shop should be able to tell you more specifically the reason for the failure.
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This is a problem in the circuit that controls the warning light on your dash. I am not sure why you would have failed emissions for this, I would call your BMV and find out.

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