every time it shuts off my computer data is lost?

1999 MITSUBISHI ECLIPSE
155,000 MILES • 2.0L • 4 CYL • 2WD • AUTOMATIC
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JUSTASKING:)
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Both the check engine light, and battery light come on, but turn off when I turn on my car again. I can't seem to pass emissions, as every time it shuts off my computer data is lost. What could be causing this? I have already changed my alternator, head gasket, spark plugs. And I've cleaned my air filter.
Jun 23, 2023 at 9:26 PM
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STRAILER
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It sounds like the PCM is bad, but we should do a CAN scan to see what codes come up, you can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

Here is how to change the PCM out in case a code comes up for it, you can get a preprogrammed unit by searching Google or Ebay. Check out the images (below). Please let us know how it goes
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Jun 24, 2023 at 11:54 AM