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You must take it to the dealership, the 2007 Cobalts from base LS model and up all have chips in their keys and unfortunately this is not something you can avoid going to the dealership....
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∙ 15y ago
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How can you check the knock sensor on 2007 Chevy Cobalt?
If a knock sensor was bad, the check engine light would be illuminated and the code(s) set would indicate so.
Where is the cigarette lighter fuse in a 2007 Chevy Cobalt LT?
under the hood in the fuse compartment there.....that is linked to the port where you get your codes read from so if it isn't working you can't read a code.
What does secondary air injection incorrect flow error mean on a 2007 Chevy Cobalt?
While the question doesn't make much sense, the secondary air injection system on a cobalt is fairly simple. If you could give an exact code the answer would be much easier to figure out.
What could code po300 on Chevy 350 and 5.7 liter vortex mean when i have replaced all ignition parts?
What could code po300 on chevy 5.7 liter mean
What is engine trouble code 42 for a 95 Chevy silverado?
Ignition bypass circuit error
Key code location for 1989 Chevy S10?
On original key knock out and on the side of the ignition switch.
How do you enter radio code for 2007 Honda Civic?
Use the radio preset buttons to enter the code after turning the ignition on.
Code PO455 for 07 Chevy Cobalt?
It means Evaporative Emission System Leak. Start with the gas cap. A loose gas cap can cause this.
What does the P1682 code means on a 2007 chey alvanche?
Trouble code P1682 means: Ignition 1 Switch Circuit 2
What does it mean when the Check engine light on Chevy cobalt?
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What is security code for radio after changing battery on Chevy trailblazer 2007?
Any security code questions can be solved by taking it to the dealership. There is no standard code.
Po171 trouble code for 2007 Chevy Equinox?
Trouble code P0171 Means: System too lean (bank 1)
