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Question Check engine light

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dick tracie

RVF Newbee
Joined
Jul 29, 2025
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The check engine light keeps coming on that says knock denser I've had both replaced plus wiring and ecm. Is there something common that could be wrong. 8.1 motor gm vortex its a 2004 holiday rambler se by. Admiral
 
Very hard to diagnose I would say check the wiring to make sure no bad connection or shorted wire. Do you have the actual P codes ?
 

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