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Every time it shuts off my computer data is lost?

Tiny
JUSTASKING:)
  • MEMBER
  • 1999 MITSUBISHI ECLIPSE
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 155,000 MILES
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.
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Friday, June 23rd, 2023 AT 9:26 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
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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Saturday, June 24th, 2023 AT 11:54 AM

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