Re: Need to clear the service engine soon light on a 04...
To clear the light just unplug the negative battery cable for 15 mins. The other way of doing it is go to autozone and have them clear it on there code reader.
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they have all details on wiring, servicing, repairing, troubleshooting, fault/error codes, PCV, engine, maintenance info, parts info, instructions on removal, installation, etc. and a lot more.
Just try it out.
Disconnect the negative battery cable for 30 minutes. Reconnect after and the code will clear. However if the problem persists, the code will come back with in 20 miles or 30 minutes.
The service engine soon light has to do with an issue with the emissions or performance of the engine. You need to have someone scan the computer for trouble codes to proceed.
The service engine soon could be an indicator that you need to have minor maintenance done in the near future. I had a Grand Am that the service engine light would turn on when I was getting close to needing an oil change. You might check your owners manual for an exact reason as to why it turns on.
should have two lights check engine and service engine soon.check engine means there is a malfunction.service soon is reprogrammable,when you change you oil. check you owners manual for reset.
The pesky "Service Engine Soon" light... honestly no one could tell you without actually servicing it, but it could be anything from an dirty air filter, to a bad block or piston, or anything. A licensed mechanic should be able to tell you after looking at it.
Most likely a one of the o2 sensors are causing this problem. What you need to do is a get a repair manual and do some pin tests on the O2's and figure out which one is faulty.
if the check/service eng soon light is on a problem has occurred in one or more of the electronic systems of the emission system/engine management, it is very rare you will feel anything, the system has very good failure mode programming to keep that from happening, at this point the only thing will be that it won't pass a smog test, or the mileage may be affected. Have a test run to see which codes are present in the computer memory.
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