Skip the auto shop - Our mechanics make house calls

Q: Car was cutting off at random, now it won't start.

asked by on

I was having a problem with my car cutting off at random times, but would re-start. Well the other day I was sitting in my car on lunch break, and it cuts off on me and wouldn't re-start. I was suggested to replace my fuel pump, which needed to be done since my car was hydro locked which is what the last shop said and i had alot of work done to it, and for some reason they didnt replace the fuel pump. well after replacing the fuel pump, same results it will turn over but will not start. Now i will be replacing my ignition coil, it does look old and worn. also i did have auto zone read my codes, they are p0420 p0108 p0401. Any suggestions?

My car has 182916 miles.

Hi there. It sounds like there is a possibility of a fault with the MAP sensor system for the P0108 code, an EGR fault for the P0401, and a catalytic converter fault for the P0420 code.

Your concern could be a combination of the MAP sensor fault and a possible idle air control valve failing. If there is a short or open circuit, vacuum leak, or damage to either of these components then the engine idle could be affected.

The ignition coil may look old, but still be properly functioning and replacement will still have you at square one. I strongly suggest acquiring a qualified technician to perform an inspection to avoid replacing unnecessary parts. YourMechanic has several available technicians that can assist you with a Check Engine Light inspection, a car does not start inspection, and provide an estimate and direction of repair.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Car was cutting off at random, now it 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: Fuse box wires burned

Hi. The issue you have experienced demands a mechanic's attention. The fuse box is the power unit to most of your main power sources in your vehicle. The burned wires are caused by overheating to a point where the wires...

Q: what is the right price to pay for the job

You have four different motor mounts on your 2004 Mazda3 and would need to have all of them checked and replace any that are broke. They range in prices and labors to replace them depending on the car. If you...

Q: No power after battery replacement

Hi, if you have a new battery and there is still no power coming to the car then there is a chance the main fuse has blown. This fuse protects the main electrical components from surges in power and will...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.