Q: Key not working

asked by on February 10, 2016

My key no longer turns in my ignition.

Hi there. This problem is caused by a lack of mobility in your ignition cylinder. The bumps on your key depress a series of channels in the cylinder in the correct combination in order for it to release it’s locking mechanism. If one of these channels is not depressed the cylinder will not allow your to turn the key. A replacement of the ignition cylinder should solve this problem. If you would like to have your key issue diagnosed, have a certified mechanic come and inspect your ignition first.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Car lost power steering, leaking coolant.
Hello it sounds like you have two problems here. Both of theses should be handled sooner than later. For the power steering the fluid level should be checked and see if the belt is on the pulley. If the fluid...
Seat belts locked up
The GM seat belts of your generation vehicle have widespread problems with the seat belt ratcheting device. The seat belts have a safety feature which is designed to stop seat belt movement during emergency braking. The safety feature is however...
Ignition switch not turning
Hello! I suspect that the key tumbler is seized or broken. Some key tumblers seize up due to lack of lubrication and debris in the cylinder. Usually a little WD-40 will free the tumbler if it is seized. If lubrication...
Load on truck's engine causes loud knocking noise
Hello. It sounds like there may be a problem with the piston or the valves in cylinder 5. Loose rod bearings to the piston can cause a knocking noise and/or a misfire condition (https://www.yourmechanic.com/services/engine-is-misfiring-inspection). A worn out piston can also...
Mileage is very low;
If you have not had any maintenance done then have a complete computer scan test (https://www.yourmechanic.com/services/check-engine-light-is-on-inspection) done to see if any codes are present. Perform any maintenance needed like air filters (https://www.yourmechanic.com/services/air-filter-replacement), fuel filters (https://www.yourmechanic.com/services/fuel-filter-replacement), and oil changes (https://www.yourmechanic.com/services/oil-fluid-leak-inspection). You...
Helicoil fell into spark plug well. what do I need to do to get it out. thank you.
There are only a couple things to try. One way is to use a magnet like you've already tried to get into the cylinder. I'm not sure what kind of magnet you used but you may have to use a...
Runs rough, replaced crankshaft position speed sensor
Hello, The crankshaft position circuit is the electrical circuit for the crankshaft position sensor. If the sensor has been replaced, then it may be possible that the wiring or connector that goes to the sensor is having an issue. If...
RPMs jumps at idle, & sometimes stalls when gas applied after a stop at alight or sign and won't restart for a minute or so
Hello. A stalling issue (https://www.yourmechanic.com/services/car-is-stalling-inspection) like this may take some time to figure out. If you suspect your fuel tank is dirty, you may want to drop it and inspect it. However, these symptoms are more likely to be related...
Receiving a service stabilitrak/brake system/ traction control simultaneously....started about 2 weeks ago.
Hi there: You would be correct to assume that these warning lights are related. In fact, in most cases, if the right sensor is bad or the electrical connection to the sensor is faulty, it can trigger all three lights....

Related articles

Symptoms of a Bad or Failing Ignition Relay
Common signs include the car stalling or not starting, a dead battery, and a burned relay.
Symptoms of Bad or Failing Points & Condenser
If your vehicle runs rough, the engine will not fire, or the vehicle will not start at all, the points and condenser system may be failing.
Understanding the Mercedes-Benz Active Service System (ASSYST, ASSYST PLUS, ASSYST Fixed Intervals) Service Indicator Lights
Car symbols, or dashboard lights, are a car service reminder. The Mercedes-Benz Active Service System indicates when and what service your car needs.