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I have a 1998.5 3500 cummins with 127000 miles, I am on my 3rd lift pump, I do have a gauge and have never let the preasure go below 10 psi to the IP, It wouldn't start for the first time, after a code check I have a 1689, 1693 and a 234. I have replaced the IP relay and now it starts and runs good, I cannot clear the 1689 pending code, Is this normal? I understand the 1693 and the 234 code but will the 1689 code come back to haunt me when I least expect it. all the truck is factory stock.

thanks in advance for any thoughts

Dan
 
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