Question about 2004 Chevrolet Cavalier

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Our at home car computer showed code PO178 for a 2004 chevy cavalier coupe 2.2L can you tell me what that code means and how to fix the problem

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Fuel compensation sensor circuit low input

Posted on Mar 31, 2011

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This code is an indication of a problem in the Fuel Composition Sensor circuit. Could be caused by either a bad sensor or bad gasoline.

Posted on Mar 31, 2011

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87000 miles. Was driving back...20 miles. On the way there, no problems, then the "check engine" light came on the way back home. Nothing audible to recognize any probs. Any...


Well when the check engine come on that means the computer stored a code and you need to scan the computer to get the code. Go to an auto part store like Auto zone and they will scan it for you for free and give you the code then bring it here and i will tell you what it is. take care

Dec 30, 2010 | 2002 Chevrolet Cavalier Coupe

1 Answer

2002 chevy cavalier has check engine light on. Got it checked and said vapour lock. How do you fix that? Also, how do you fix a barring? Is it just better to take it on to get fixed


Vapour lock could be a bad gas cap..

reset the code and get a new gas cap,,

I never changed a barring on this car. but get the book for the car $20 at autozone for help with this..

Mar 12, 2010 | 2002 Chevrolet Cavalier Coupe

2 Answers

Dashboard Symbol


could mean time toi change oil or needs service,if u call dealer they might tell u its one or the other not sure though im leaning toward service engine soon

Aug 24, 2009 | 2002 Chevrolet Cavalier Coupe

1 Answer

Problem with 2002 Cavalier


means the traction control has been turned off. usually due to a broken wheel speed sensor. if the computer doesn't know how fast the wheel is turning it can't tell when to use the traction control.
is you ABS light on too?

Jun 25, 2009 | 2002 Chevrolet Cavalier Coupe

1 Answer

Engine light is on


get it to a shop get a computer diagnostic check done on it it will tell u all the codes.i have my own actron readscodes expensive but ive gotten my money out of it i drive cavaliers 2 door and a Z24

Jun 10, 2009 | 1998 Chevrolet Cavalier

1 Answer

2000 chevy cavalier ABS and Brake lights staying on


You had it scanned? They didn't find any codes? If there were no codes, did the ABS computer even communicate? Also did you check the brake fluid, most newer cars have a float switch in the master. If the fluid is low that will set off the lights.

Mar 09, 2009 | 2000 Chevrolet Cavalier

1 Answer

Can anyone tell me whats the noise on my Chevy Cavalier 2002!!!!


From the video, its sounds like something in the intake, or maybe a valve problem?

Feb 27, 2009 | 2002 Chevrolet Cavalier Coupe

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