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Use a Auto Scanner tool,fallow step by step reading process,take note witch code number "show" as defective,possible sensor fail, after replaces erase code using your Auto Scanner.Do it the same if another code number come out.
Unless you have a code checker with a reset switch, the easiest way to reset the light is just to remove the negative battery terminal for several minutes. That will usually do it.
Also, you don't actually need a code checker to pull the codes. With the engine shut off, you can quickly turn the key back and forth twice between the OFF and RUN positions. On the third switch from off to run leave it in the run position. The engine light will flash one or more two-digit codes. For example, if the light blinks twice, then pauses, then blinks three more times that's error code 2-3.
the vsc light comes on when ever the check engine light comes on, this is because the vsc cant operate correctly when engine isnt running right so computer shuts it down and light turns on, you need to have the computer scanned for codes to figure out why check engine light came on,the codes that are stored will point you in the right direction of the problem, autozone and other auto part stores will scan for free,
You can't jump wires to read codes on this model.older modules you could.check engine light will come on and stay on with key in on position.this is normal.Check to see if security light is flashing after you try to crank engine.If so you have to relearn theft module by leaving ign key in run position for about 12 minutes until security light stops flashing.Very common problem
the check engine light comes on whenever one or more of about 200 faults occur in the electronic engine or emmision controls, the only way to determine which system is causeing the problem is to have the system computer tested for the trouble code(s) that is stored when the light is turned on by the computer, which is known as the PCM
I purchased a hand held Code Reader at WalMart for around $100.00. The reason your Check Engine light is coming on is that you need to "Check your Engine!" If you have a service manual it will tell you what the codes mean. I had Check Engine Light on for months because I had a high idle speed of over 2,000 RPM. I kept digging on the Saturn Forum website because I could figure out what was causing the high idle. Finally after about 6 months of the annoying Check Engine Light coming on I finally figured out that I had a blown intake manifold gasket. I changed the damn thing and now the light stays off! Imagine that! The Code Reader will also reset you engine so the "Check Engine Light doesn't come back on until the computer senses that there is still a problem.