Skip the auto shop - Our mechanics make house calls

Q: What could be wrong with my vehicle? It stalled on the highway.

asked by on

So I'm driving on the expressway and my vehicle just stops we replaced the battery and the alternator . the check engine light has been on for a while . a few weeks ago it was idling rough and not acting right like it didn't want to start. like it didn't want to run but then all the sudden it started acting fine again any other ideas on what it could be or what else we could check

My car has 150000 miles.
My car has an automatic transmission.

A: Hi, first task is to check for the problem ...

Hi, first task is to check for the problem codes that are setting the Check Engine Light. Since you have a "hard stop" failure, this become even more important.

First level isolation is to see if you have spark, or if this is a fuel issue. If you have spark, does it start briefly by spritzing a bit of starter fluid into the air cleaner when trying to start it.

If no spark, check fuse for ignition, then "walk the electrical power path" from the ignition switch to the coil, ignition module, ignition pickup in the distributor - components that would affect all cylinders at once. If it's fuel - check fuel pump fuse, relay, and listen for the pump running when you attempt to start it.

To avoid any unnecessary repairs, I would recommend having a no start inspection completed by a mobile, professional mechanic, such as one from YourMechanic, who can come to where the truck is located to diagnose this problem, get an accurate assessment of damage and cost estimate for repairs.

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: Car not charging

A starting charging test should definitely be carried out. This will reveal whether or not the battery has been drained and needs replacement. This also checks the starter for proper operation and cranking voltage. The alternator will be tested checking...

Q: Will not crank

Hi, thanks for writing in. It sounds like your alternator may have failed. If your vehicle died on the highway and will not even crank the starter now, it is likely that your battery is fully discharged. The only way...

Q: Died,then wouldn't crank for a few min then cranked and drive but cut out once in the way back home.

This may sound like a dumb question, but when was the last time you put gas in it? It may be possible that the fuel gauge sending unit is failing and giving you a false reading. It is also possible...

Related articles

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...