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.

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?
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. All of a sudden it dies while driving?

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: Rough idle and turns off

This suggests you may have intermittently firing ignition coils which may be causing occasional misfires causing the rough idle you describe. This is somewhat common as the ignition coils begin to wear out and begin to sporadically. Ignition coils are...

Q: Transmission shifts into 1st and 2nd only. When it goes into 3rd gear, the engine revs up and seems as if the transmission is in neutral.

Hi there. According to the shifting charts to your transmission, third and fourth gear both use the Overdrive Clutch as a holder to get the gears with the Underdrive Clutch and the Fourth Clutch. Since your vehicle will only get...

Q: My 96 Jeep Cherokee Classic does not start up when it has been sitting for hours or overnight

Hello. The symptoms you describe can be caused by a wide variety of issues. Issues with the fuel and engine management systems can often produce these symptoms. A few things I would look at are the fuel pressure, fuel pump,...

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 Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...