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How to Troubleshoot a Car That Won't Turn Off
If your car won't turn off, inspect the power relay, idle speed, ignition timing, and spark plugs. Using premium fuel may help but isn't a solution.

Related questions

My car starts then shuts right off

The first thing to check for in a case like this is air leaks. Any air that gets into the engine without going through proper channels will lean out the system and cause problems like this. Look under the hood...

Why do my car shut off when I stop

The first and easiest thing to do is to check for air leaks. Any air that gets into the engine without going through the air mass meter will lean out the fuel mixture and affect the idle. Inspect the rubber...

Oil pressure low

The oil pressure light (https://www.yourmechanic.com/services/oil-pressure-light-is-on-inspection) will illuminate whenever the issue has been detected by the maim computer. If the car is started and the issue hasnt occured yet, the light may come off and on as the issue is detected....

Ignition Problem

Hello, thank you for writing in. To better understand this strange issue, it helps to know that the engine receives most of its power from the alternator once the engine has started. When the field to the alternator is not...

Car dies when put into gear

Hi there. From the description you have given, of your vehicle's engine dieing, it could be several things. Assuming, there is no Check Engine Light on, leads me to believe, the vehicle computer is not recognizing the fault. It could...

Car turned off & wont start after oil was empty

If the car shut off because it was low on oil, there was probably serious engine damage. But when that happens the shut off is usually preceded by a lot of knocking and other engine noise and maybe overheating. It...

Engine cutting off

This is a sign of a failing or dirty mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected into...

having times when I'm stopped at a light and my Hyundai Accent Sedan 2010 loses power. Sometimes takes a while to restart.

If I interpret what you say correctly, it sounds like an electrical malfunction. I wouldn't worry right now about the struts and transmission flush. Those are high margin sales that many of the chains push on everybody that comes in...

I have a 2011 Hyundai sonata and the key is stuck in the acc position and will not turn off. I can start the car but I can't turn

Hello, thank you for writing in. When the key will not turn to the "Off" position, typically that will mean that you have an issue with you neutral safety switch. This safety feature limits your ability to turn the key...

My car will start but will only run for a certain amount of time before the engine shuts off. Then it won't start. Why?

Hi there. In many cases, when the car will start but quickly stall, it's due to either a reduction in fuel flow (caused by a worn out fuel pump, dirty fuel filter or clogged or dirty fuel injectors or the...

Won't stay running

Hello and thank you for your question. It seems to be the transmission that is causing the engine to stall out when you are putting the vehicle into drive. The transmission could have a converter clutch lock up issue causing...

Starts then dies.

Hello there, many common problem will cause your 2002 Volkswagen Passat to start the die and have the check engine light illuminated. You have done well in diagnosis so far and in replacing common failure components. Before any more parts...

Ignition problems

Hello. If you are losing battery power to particular circuits then most of the time this is caused by a bad ground connection, a failing battery cable (https://www.yourmechanic.com/services/battery-cable-replacement), or it may be a bad transmission position sensor (https://www.yourmechanic.com/services/transmission-position-sensor-switch-replacement). It is...

Car shuts off while driving

Hello. Most of the time if the car just shuts right off then it is caused by a main relay that is failing or a distributor issue. I usually start by determining if the engine is losing spark or fuel...

My car cranked and ran for about 10 minutes. When I started to drive it shut off. Then it would not crank again.

The first thing to look for is air leaks. any air that gets into the engine without going through proper channels will lean out the system and cause problems. Look under the hood for any rubber hoses or boots that...

Car lost ability to accelerate going down the road, then eventually died.

If there were other bad behaviors leading up this failure, like backfiring or surging, I suggest looking for any apparent air leaks in hoses leading into the engine. Any air that gets into the engine without passing through the Mass...

My car will start up and run fine until reaches normal temperature and be hearing clicking from kick pannel and car shuts off

The relay that is clicking is the main computer PCM/Fuel pump relay. The relay may be bad or may be getting overheated from a fuel pump drawing too many amps. I suggest you replace the relay first and then see...

My car will not stay started after installing a new alternator

Hello. You will want to check that the alternator installed has the right amperage output for your vehicle. Some vehicles take two or maybe three different types of alternators and the one that was installed may not have sufficient power...

Went through a puddle and my car won't start

Most of the time when people describe shutting off after driving through a puddle, drying out the ignition system is enough to get it going again. But if that were the case here, with the pieces that you have already...

Car shuts off and won't start 2007 Chrysler PT Cruiser

Hi there - first task is to check for problem codes, whether the Check Engine light is illuminated or not. This "stall, no start" behavior (https://www.yourmechanic.com/article/what-causes-a-car-to-stall) could be a failed fuel pump - check the fuse and relay - since...

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