Q: Dosen't always start

asked by on September 12, 2016

it doesn't always start
My car has an automatic transmission.

Hi there. There are a lot of things that can cause this. It really depends on what the car is doing when you are trying to start it. If the engine cranks and it just does not start then most of the time it is a bad crankshaft position sensor. I usually use a scan tool to monitor the sensor signal to see if it is correct when the issue is occurring. If it is not then I replace the sensor.

It can also be a number of other things including a fuel system issue. If the car does nothing when you try starting it then most of the time it is either a bad connection at the battery or a failing starter. It can also be a failing ignition switch or a clutch switch if the vehicle has a manual transmission.

Some electrical diagnostics would need to be done to find out which one it is. If you need to have this looked at, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose your starting issue firsthand.

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

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

Hi Noe! Happy to talk with you! My 2001 Dodge Grand Caravan 3.3L V6 engin is leaking the coolant green water. i don t know where?

Hi there. It's quite possible that you have a few things going on with your Grand Caravan that are causing these issues ranging from a damaged thermostat, radiator fan motor, or even an obstruction of coolant inside the heater core....

Won't start. Just cranks, catches, and dies

Hello there, a few different faults will cause your 2001 Pontiac Grand Am to start and then die. Replacing the battery was a good start, as it can cause this type of issues. Other possible faults include the MAF sensor,...

Car switched off but did not start when I tried to restart

Hello. First of all, rotating the engine counterclockwise could very well cause the engine to "jump time", and cause engine damage. The timing chain tensioner is not designed for this pressure, and can allow the timing chain to jump one...

Related articles

Symptoms of Bad or Failing Fuel Injector O Rings
Common signs include an odor of fuel in the car, fuel leaks, and the Check Engine Light coming on.
What Prevents the Fuel System From Leaking?
Leaking Leaking fuel is a hazardous and wasteful problem for a vehicle to have. Manufacturers know this, and to combat the problem they have implemented a number of simple ways to prevent fuel from leaking out of the fuel system:...
Kia Certified Pre-Owned (CPO) Car Program
If If you have been shopping for a used Kia vehicle, you may want to check out cars under their certified pre-owned program. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. Read on...