C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

check engine not working

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Old Jun 18, 2002 | 12:47 PM
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mpm1950's Avatar
mpm1950
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Default check engine not working

I am trying to pull any codes that I may have, using the ALDL plug, m problem is that it does not give any response, not even the initial 12 code, my question is how do you troubleshoot the check engine (error codes) system?

Thanks
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Old Jun 18, 2002 | 02:05 PM
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Default Re: check engine not working (mpm1950)

I'll assume that you grounded the proper pins and then turned the igition on. I wonder if someone pulled the bulb out on the SES light? If you just turn the igition on, the bulb should come on. If not the bulb is either missing or burned out.

Other than that, if you do not get a flashing 12, it usually means that the ECM is bad.

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Old Jun 19, 2002 | 04:17 PM
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mpm1950
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Default Re: check engine not working (Flame Red)

Thanks,

I have made sure the bulb was good, I thought it may be the ECM.

Michael
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