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?
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: Warning code P0340

The camshaft sensor is a 3 wire sensor. Power and ground need to be checked and the signal wire can be scoped to see if a signal is present as the engine is running. Generally, the camshaft sensor itself is...

Q: Q: Car making noises while driving

If your car is making a clunking or rumbling noise, I suspect that perhaps a wheel bearing or CV axle has failed. However, it would be hard to properly diagnose this issue without an in-person inspection. I would recommend having...

Q: 2000 Mercury Mystique jerks, sudden increase in RPMs, whirring sounds

Hello. I suggest that a technician inspect the following things. First the transmission fluid level should be checked. Low transmission fluid could cause a vehicle jerk. Also, the condition of the wheel bearings and CV axles should be inspected because they...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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.