The Chevy Cobalt is a compact car that many use as a daily driver. It has existed for two generations and is currently in its second. This post reviews the top 5 Chevy Cobalt problems owners tend to run into with the 1st generation, years 2005 to 2010.
Most Common Issues with the 1st Gen Chevrolet Cobalt (2005 to 2010)
1. Ignition Coil Failure
Symptoms of Ignition Coil Failure
- Rough running engine
- Flashing check engine light
Causes of Ignition Coil Failure
The ignition coils tend to fail on the 2005 to 2010 Cobalt.
How to Fix Ignition Coil Failure
The ignition coils are located on top of the engine. The steps to replace them include disconnecting the electrical connector, removing the bolt from the ignition coil, and removing the ignition coil. We recommend replacing the spark plugs at the same time.
2. Combination/Turn Signal Switch Failure
Symptoms of Combination/Turn Signal Switch Failure
- Some headlight functions on the turn signal switch may not work
- Turn signal does not turn off after turning the wheel
How to Fix Combination/Turn Signal Switch Failure
Replace the combination switch, also known as the turn signal switch.
3. Gas Cap Failure
Symptoms of a Bad Gas Cap
- Check engine light—possibly for an EVAP code
- Fuel smell near the car
How to Fix a Faulty Gas Cap
Remove the gas cap. Check the seal for cracking or other damage, like stretching or broken pieces. Test the gas cap’s ability to tighten and ratchet. Inspect the fuel filler neck for corrosion. Replace the gas cap or the fuel filler neck if needed.
Read more about how to inspect the gas cap
4. Shifting Problems
Symptoms of Shifting Problems on the 2005 to 2010 Chevy Cobalt
- Ignition key does not remove from the ignition key cylinder when the car is in park
- Car does not shift into selected gear
Causes of Shifting Problems
Sometimes the shifter cable fails on the 1st gen Cobalt and causes problems with the ignition key and shifting gears.
How to Fix Shifting Problems
Some Cobalts had a recall for this problem where a clamp is put on the cable to prevent this from happening. This may solve the problem, but the cable may also need to be replaced.
5. Timing Chain Tensioner Failure
Symptoms of Timing Chain Tensioner Problems on the 1st Gen Chevy Cobalt
- Rattling from the timing chain area when cold starting
Causes of Timing Chain Tensioner Failure
The timing chain is located underneath the covers at the front of the engine and can fail on the 2005 to 2010 Cobalt. It’s important to address this problem as soon as possible to prevent the timing chain from skipping a tooth on a gear or breaking, which can cause more engine damage.
How to Fix of Timing Chain Tensioner Failure
It’s a detailed job to replace the timing chain since a lot of components need to be removed, so you may need to have a professional replace the timing chain.
Learn How to Do Common Repairs on the 1st Gen Chevy Cobalt
Learn how to replace parts like the headlights and brakes yourself with instructional videos in 1A Auto’s video library on the 1st gen Cobalt and many more makes and models.
1st Generation Chevrolet Cobalt Model Years
- 2005 Chevy Cobalt
- 2006 Chevy Cobalt
- 2007 Chevy Cobalt
- 2008 Chevy Cobalt
- 2009 Chevy Cobalt
- 2010 Chevy Cobalt
Related Content
- How to Diagnose an Engine Misfire
- Signs of a Failing or Bad Ignition Coil
- How to Test If an Ignition Coil Is Bad
- Gas Cap Throwing a Check Engine Light? [Diagnose & Fix]
- Is your Transmission Slipping, Jerking, or Low on Fluid?
1st Gen Chevy Cobalt Parts
- Engine & Engine Management
- Interior
- Drivetrain
- Fuel & Emissions
- Brakes & Wheel Bearing
- Headlights & Lighting
My car surges when you stop really bad. It also surges while driving. I can turn off air-conditioning while stopped and it’s not as bad but still surges. Any suggestions?