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P1523 Diagnostic Trouble Code Discussion for October 2011

ETC System Malfunction - Throttle Valve Stuck

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Trouble Ticket Help Requests for DTC P1523
Help Request Posted
2003 Chevrolet Trailblazer LT 4.2L Misfire VIN: 1GNDT13523
P1523: TAC Module Return Performance. I have 2 problems with this POS most importantly it misses at an idle and occasionally at speed(customer "thinks it misses at speed" could be very slight or not at all). We cleaned the fuel rail and thought we made an improvement so we tried a set of i...
October 22, 2011