Skip the auto shop - Our mechanics make house calls

Q: Check Engine Soon light on

asked by on

The Check Engine Soon light comes on and then car dies at a stop light. It always starts again and then the light will go off after a day or two. Today the light came on, and it jerked a lot and lost power off and on. I had it checked recently, but nothing showed up during the diagnostic.

A: If the Check Engine light comes on, there i...

If the Check Engine light comes on, there is most certainly something stored in the memory. There are several types of codes that can be stored. Hard codes are things that are faults the computer picks up with your car as soon as you start it. Soft codes are faults that happen every once in a while. Both are usually stored in the memory even if the light is off. The third thing we can look for is what is known as "Freeze Frame Data". This is like a mini movie that the computer records when a fault is occurring. I would definitely seek the help of a qualified mechanic, such as one from YourMechanic, to help inspect your Check Engine Light issue. It might help to mention the possibility of looking at the freeze frame data being stored.

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: My van if I'm lucky goes 20 mph for a few minutes then it crawls.

Hi there: After reading your question; it looks like you've been all over the map trying to fix issues with your Plymouth Voyager. The symptoms you're describing could be caused by multiple components ranging from ignition system issues, fuel system...

Q: Engine hesitating in the first 20 minutes of driving when cold

This could be caused by a cold state vacuum leak. Basically, this is a condition where a vacuum leak is present until the engine heats up and the induction parts expand and seal the leak. When the vacuum leak is...

Q: I need help with diagnostic trouble codes that suddenly appeared making vehicle almost undriveable.

Firstly, you should have the battery disconnected and the PCM disconnected. Check their connectors for any problems and apply dielectric lube to the connectors so the connection is clean from corrosion. If the problem continues then replace the PCM. All...

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...
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...
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.