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I've joined this premium channel recently and need help with a problem causing several diagnostic trouble codes (P2138 and P2123 on the APP sensor, P0451 on the fuel tank pressure sensor, P0343 CMP sensor circuit high voltage- reads 9 v, and P0118 ECT sensor high voltage - shares the 5 v reference with the CMP sensor so it also reads 9 v). The car won't start - it cranks but sounds abnormal. I started diagnosing it on Justanswers here :
www.google.com/url?sa=t&rct=j&q=&esrc=s&...qp9ckOu9QLdo6IEFR4hv
I'm thinking there is a problem with the computer ground but the wiring diagrams (attached wiring diagram or on Justanswers ) may be incomplete not showing where all the computer grounds are. Any help would be appreciated. Marty
Welcome to the forum. The techs in here know their s#it. You should post your tech question in the diagnostics forum for more feedback. Good luck with your diagnostic feedback.
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