L5p delete issue - Chevy and GMC Duramax Diesel Forum
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post #1 of 8 (permalink) Old 10-18-2019, 08:33 PM Thread Starter
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L5p delete issue

Ok need help I have a 2018 l5p just did the full delete and started it up tonight. My fuel gauge isnt working it shows empty and I have a check engine light on that has a u18a2 code and truck stays in high idle until I put it in drive
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post #2 of 8 (permalink) Old 10-18-2019, 08:49 PM
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This prolly isnt what you want to hear on a Friday night, but your best bet is to contact the company that did your tuning & get them to straighten out since it sounds like a software issue with the electronic fuel gauge not working and the high idle.
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post #3 of 8 (permalink) Old 10-18-2019, 08:57 PM
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Check connections. If no remedy, call tuner

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post #4 of 8 (permalink) Old 10-18-2019, 09:06 PM Thread Starter
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Ya sucks I have to wait I'm disconnecting the negatives for 10 minutes and see what that does if nothing then I have to see what they say. Also remote start doesn't work
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post #5 of 8 (permalink) Old 10-18-2019, 09:16 PM
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I think, as a rule, remote start won't work with a CEL on. Could be wrong... especially if you don't have any lol

2018 GMC l5p ccsb stone blue metallic. Mcgaughy's 2" drop shackles. Truxedo tonneau cover. 20% tint. B&W turnover ball hitch. N Fab running boards, Duraflaps, Rhino lined bed

Traded:05 lly ccsb 205k miles, built trans and supporting mods

Traded:09 LMM CCLB Bone stock, fully loaded. 86xxx miles.
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post #6 of 8 (permalink) Old 10-19-2019, 08:44 AM Thread Starter
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Anyone have an idea what the u18a2 code is I cant seem to find a definit answer
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post #7 of 8 (permalink) Old 10-19-2019, 08:59 AM
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Originally Posted by Noble_dmax View Post
I think, as a rule, remote start won't work with a CEL on. Could be wrong... especially if you don't have any lol
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post #8 of 8 (permalink) Old 10-19-2019, 10:32 PM Thread Starter
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Yes the remote start issue is correct I forgot. Update I think I may have solved the issue well I have to wait till monday for the part to ship and so I can call and verify it's the issue. However I never installed the can bus harness when I removed the def tank. So hopefully when that comes in itll fix it
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