Skip the auto shop - Our mechanics make house calls

Q: All of a sudden it dies while driving?

asked by on

I have a 1999 Jeep Grand Cherokee and all of a sudden it dies. It didn't show that it was overheating. I just recently dropped the oil pan and put all new oil. I'm always needing to fill my coolant. I had a little under 1/2 a tank of gas. With all that to say, I had been working under the hood trying to find out why it won't start. It sounded like it wanted to, but just wouldn't turn over. By this time it's been 30 minutes or more and it finally starts. I get home and hook up my codes reader and when I first plug it in, the first time this has happened my codes reader beeps three times twice and says that I have zero codes?!? This leaves me pretty confused considering what just happened. Any chance you could help me understand what's wrong? Please and thank you.

My car has 212369 miles.
My car has an automatic transmission.

A: Hi, thanks for writing in. This could well ...

Hi, thanks for writing in. This could well be a failure of the fuel pump relay, or the crankshaft position sensor. Both electronic components which can start failing from heat/use, then cool off and work again. Over time, sometime a short time, they fail more and more often and then suddenly there is no recovery. Since the crank position sensor should set a code when it fails, but the fuel pump relay won't generally - check/replace the fuel pump relay first. I would recommend having YourMechanic.com confirm the diagnosis for this issue, provide an accurate assessment of damage, and estimate the cost of repairs. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as needed.

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!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: P0300, P0303, P1313, and P1314 codes are read on the scanner.

Hi there. The codes p0300 and p0303 are for the engine having a misfire. P0300 is for a random misfire where p0303 says that cylinder 3 had a misfire all the time. The code p1314 means that the catalytic converter...

Q: Is the rotor part of the hub assembly if not what is the difference between the hub and rotor

Hi there. The rotor is the metal disc that the brake pads use to stop the vehicle. The pads are pressed against the rotor with great hydraulic force thus squeezing the rotor. The friction of the pads against this surface...

Q: How do I replace the front bumper cover?

Hi and thanks for contacting Your Mechanic. Check to see if your Jeep has a lower air dam under the engine. If your Jeep does, then you will need to remove the secured bolts the dam that hooks up to...

Related articles

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...
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.