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CHEVROLET CAVALIER
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PMANOL
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  • 2 POSTS
I have a 95 Chevy Cavalier and code 27 is comming up which is Quad driver Module (QDM1). the dealer has told me to replace coil pack that did not fix it and then they told me to replace PCM that did not fix problem and the problem has gotten worse what does (QDM1)control on my car
Jul 12, 2007 at 11:41 AM
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E40WATER12
  • ✓Experienced Mechanic
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usually code 27 is could be cuase from EGR valve stuck open, Not always a the Ecu /pcm, Could have a short in the wiring, Or a sensor.
Jul 16, 2007 at 9:43 PM
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PMANOL
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[quote:e8a5b1ac85="e40water12"]usually code 27 is could be cuase from EGR valve stuck open, Not always a the Ecu /pcm, Could have a short in the wiring, Or a sensor.[/quote:e8a5b1ac85]

but what sensor I put a new EGR valve on it could the EGR control valve relay be bad or the Idle Air Control (IAC)valve
Jul 17, 2007 at 4:29 PM
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