Q: Q: Cranks but won't start

asked by on

Truck just shut off no warning no nothing im told it could be auto shut down relay how do I confirm that I tried using a decoder but being told the vehicle must start also need to know if I should just buy the computer or try eliminating the sensors.

My car has 180000 miles.
My car has an automatic transmission.

This may happen for many reasons. There are in fact modes in your truck’s computer that will trigger the ECU to shut the engine down in the event of some kind of failure that may cause major damage. This is a fail safe measure that is taken by the ECU when it detects critical components that may be not functioning properly or something that could jeopardize the safety of passengers or the engine.

Without power to the ECU itself, it my be difficult to use a scanner, however this can be bypassed, but does take a bit of skill. I would suggest having an expert from YourMechanic come to your home to diagnose your no power issue.

Was this answer helpful?

Hello, thanks for writing in about your Dodge Ram 1500. I’m curious if your Check Engine light on. Checking the basics will help here: will it crank but not start? If so, is there spark at the plugs and does spritzing some starter fluid result in a brief engine start? Check fuel pump and ignition fuses and relays - a hard shut-down was a clear failure of some kind.

If you need help with this issue, I would recommend having your no start condition inspected by a certified technician, such as one from YourMechanic, to diagnose this problem, get an accurate assessment of damage and cost estimate for repairs. YourMechanic can dispatch a mobile, professional mechanic to your location for this repair.

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. Q: Cranks but won't start

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 won't start - Hyundai Elantra

The first step that should be done is to have a certified technician, such as one from YourMechanic, download any error codes for you and diagnose your illuminated Check Engine Light. If you have a professional digital scanner, you can...

Q: Car hardly shifting into gear

Hi there. Sounds to be that you're having issues with the transmission internal components. Shift solenoids switch between the gears, if one or multiple solenoids are malfunctioning it will cause your vehicle to not shift into those specific gears. Also,...

Q: Q: Car wont start

Have the vehicle scanned and see if there is any engine codes. If you have codes then have them diagnosed first in order to more easily pinpoint the problem. If you are getting cam or crank sensor codes, then look...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.