Q: Misfiring on a 2012 1.8 Chevrolet Sonic

asked by on

I've got a 2012 1.8 Chevrolet Sonic with a misfire. I've checked the injectors, compression and all is okay, but the coil is the one unit that sits on top of the motor. How do I test that?

Unfortunately, for this problem GM has a poor design. The entire coil unplugged is a whole assembly and you really can’t check that thing individually because it has a sealed unit that goes on top. My advice is to have a guy like me or YourMechanic to come to you and diagnose your misfire.

They can analyze your computer system with their dealer-level scanners and if they find that you have various misfires then you just have to buy a new coil pack. You can get one that is not that expensive from an aftermarket seller. They do seem to go out a lot on this particular vehicle and you really can’t check them yourself. You need a mechanic with fancy scan tools to see if they are okay, or get a replacement coil pack.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Misfiring on a 2012 1.8 Chevrolet Sonic

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Fuel injector problems

Hello. Thanks for writing in. The diagnostic code that is triggering your warning light it's a fairly generic code relating to a bad reading at one of the sensors. This bad reading can mean that there's an electrical or mechanical...

Q: Q: How do you use the map lights?

Your map lights provide additional illumination for the driver and front passenger. They turn on when your interior lights are set to on or the door setting, but they can also be operated independently. To use your map light, just...

Q: Q: Cylinder 2 misfire

You need to pull out the coil and check to see if there is oil in the spark plug hole, or on the plug wire boot. If there is, then replace the valve cover and spark plug boots after cleaning...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.