scanner code 1689
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scanner code 1689
hooked up a scanner to my truck finally. the description said, ecm could not communicate with the injection pump module. after i scanned the truck i shut it off and restarted it two times and after the second startup the code and the check engine light went away. advice on how to proceed. im in dire need of a better lift pump cause the onei have is barely gettin me 12 psi to my pump. as for the code though whats that mean? it sounds like a loose wire, which would be a godsend to me.
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P1688 and P2016 are usually considered the VP-44 death codes.
12 psi to your pump is plenty unless you have lots of performance mods. As already mentioned, I would check all the grounds on your truck. I believe there are 7 or 8 (cant remember tho')
Last edited by Dr. Evil; 01-20-2011 at 02:22 AM.
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