Question about 2005 Chevrolet Cobalt

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Why does reduce engine power light comes on chevy

Why does reduce engine power light comes on chevy cobalt 2005 , it tops out at 30mph

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  • Anonymous Mar 13, 2014

    chevy impala 2010 reduce engine speed light comes on

  • Anonymous Mar 18, 2014

    after driving 10 miles reduced power and oil light comes on and engine starts to ping.

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That is a hard problem to pin point without knowing what codes the computer has stored. It can be any number or sensors or engine problems.

You can go to most auto parts stores and they will pull the codes for you for free.

Posted on Jul 27, 2009

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I my chevy cobalt ls 2008 the eng. power reduced light is on with these code showing 1.monifold absolute pressure/barometric pressure circuit low po 107 (2) throttle/ pedal position sensor switch A circuit low po 122 (3) sensor reference voltage A circuit open po 641 (4) exhaust valve control solenoid circuit high bank 1 po 080 how can i fix this myself

Posted on Feb 28, 2014

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Throttle position sensor under the dash may be bad. same thing happened to my 07 cobalt

Posted on Apr 28, 2014

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Will the oxygen sensor cause a colbalt to reduce

Posted on May 10, 2013

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Posted on Jan 02, 2017

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So I was at a red light and my 2005 chevy cobalt turns off. I panick. So I keep trying to start the engine with the key. nothing. I get out walk to liquour store to call my bro (the day i forget my cell)...


My suggestion is this. Change your fuel filter. Often they plug up & don't supply enough fuel. If you leave the key on long enough pressure will usually return for a short time & presto the same problem again. The fuel filter is usually located on the passenger side frame rail rear door area. Change it! Good luck!

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Oct 08, 2009 | 2005 Chevrolet Cobalt

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2005 chevy cobalt check engine light on


i went to advance auto and they pulled the check engine light code and they said it was just wet electrical equipment from all the rain we have had and that it would dry out in a couple of drives so they reset the code and told me to come back in if it comes back on.

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2005 chevy cobalt


I had the same problem. Have it checked at an checkers with one of their computers. I had a multi misfiring. I changed the ignition module on it. It runs great now.

Oct 31, 2008 | 2005 Chevrolet Cobalt

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