Engine light is on on my 2009 Chevy Cobalt. Have replaced battery and alternator. Still seems to run like it is bucking when idle and stops when given gas. If stopped at a traffic light I put it in neutral and it straightens up. Possibly needs a tune up?
SOURCE: Codes P0303, P0451,P0440- gas cap replaced 2X check engine light
PO303 # 3 cylinder miss fire: check ign coil and wires,
PO451
PO440: looks like perhaps something to do with the fuel line change! i would look further into it before traveling far perhaps a really well reputed garage can help?????
SOURCE: 2005 Chevy Cobalt, how do you reset a fault code?
Your car has a OBD2 hook up under the dash somewhere on the drivers side, You have to have a computer to hook up to that ODB plug and reset it, If you live near a Autozone they will clear the code for you for free, One other thing you try is disconnecting your battery for about 30 mins, that works on alot cars to reset the check light.
SOURCE: 1996 Chevy Lumina Sedan Whining noise from engine
The pattern you describe is consistent with an alternator going bad. Maybe the fields are already rubbing together. Test it this way: Start the car and leave on idle, when the whine is worse, then start using up electricity, by increasing the demand. Turn on AC, then lights, then full blower and then high beams. If there is a change in the whine, then either alternator or voltage regulator is the culprit. When a compressor pulley bearing is bad, noise shifts just by turning AC on and off.
SOURCE: 2002 Ford Taurus SEL, DOHC Misfiring
Disconnect the battery completely, try turning the key with the battery disconnected. Put the battery back together. The check engine light should be off now..
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