Skip the auto shop - Our mechanics make house calls

Q: Car stops accelerating and check engine light comes on momentarily while driving.

asked by on

On occasion while driving my car the theft light, check engine light, and battery light turn on and the speedometer will drastically drop for a second. It also feels like my car stops accelerating when this happens. This can happen when driving on the freeway or driving in town. Power relay maybe? Any advice?

My car has 180000 miles.
My car has an automatic transmission.

Hi there:

It is very possible that the issues you’re experiencing are cause by a faulty main relay issue on your 2003 Mercury Sable. However, it could be other issues ranging from your alternator to simple wiring or a minor ground issue. To determine precisely what’s causing this problem, you should have a professional mobile mechanic complete an engine is stalling out inspection.

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
  1. Home
  2. Questions
  3. Car stops accelerating and check engine light comes on momentarily 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: I have a 2002 mercury sable with about 128 thousand miles on it, The last few times I have started the engine cold the rpm goes up

My guess is that you have a vacuum leak. Check all of the rubber parts and hoses to make sure they are connected and in good condition. Any air that gets into the engine without going through proper channels can...

Q: Black my link screen, the check engine came on while driving blonking for a minute then shut off.

Anytime you have an electrical fault that disables a system (like your radio and the entire screen) it is cause for concern. The truth is that the only way to determine what's causing this problem is to have a professional...

Q: I recently got a 2002 used mercury sable which ive only had for a week, tried to start it and it starts up but it wont move?

The cause can be simple or it can be more involved. If the emergency brake was set, it can be that the brake cables are seized and not releasing the rear brakes. If the emergency brake has not been used,...

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...
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...
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...