Q: Key won't turn, Check Engine light on.

asked by on

Key does not turn in the ignition and the Check Engine light is on. I checked both oil and water and they are okay.

If it is the correct key and it is inserted all of the way in, then most likely the cylinder is bad. Wiggle the key around while trying to turn it. It may eventually unlock and turn, but this problem will not go away, the ignition cylinder must be replaced. Also, be sure that your gear shifter is all the way in Park. Some cars lock the key cylinder if the Park switch isn’t met or the shifter isn’t in Park. Also apply pressure to the key of your car and turn the steering wheel back and forth until you find the free spot. A mechanic, such as one from YourMechanic can come and replace the key tumbler assembly if these things do not work.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
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. Key won't turn, Check Engine light on.

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: My car wont start, doesn't click and will not start with a jump either.

It sounds like your starter has failed. There is also a slight possibility that the alternator is bad but I would say starter first. I would start with a charging system test and figure out what is causing your vehicle...

Q: Hello, my car has no spark, no controlled ground for the fuel pump, and no injector pulse. Fuse link close to the battery and relays are good.

Hello and thank you for contacting YourMechanic. The ECU is under your passenger's side seat. You can gain access to it by simply sliding the seat all the way forward and removing the plastic cover from the ECU. You can...

Q: My car is cutting out it is an 02 impala and it seems like it is starving for gas. I have replaced the mass air flow sensor, plugs

You should first scan the computer for codes. Diagnose any codes received. The problem sounds like a clogged fuel filter. Replace it if it has not been replaced.Then it can be the camshaft or crankshaft sensors on this engine. ...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.