Q: Check engine light spontaneously comes on

asked by on

The check engine light on the instrument panel keeps spontaneously coming on. Soon after this warning light illuminates, my car started jerking forward. This happens at various speeds; I have not noticed any pattern to the speed. I went to an independent mechanic, but he could not duplicate the problem so he couldn't repair it. In your expertise, what is causing this problem?

Hi there, thanks for writing in about your 2003 Geo Tracker. There are numerous potential causes for the problem you are having. It could be anything from a bad spark plug to a failed sensor. The only way to know for sure is to have the vehicle diagnosed while the it’s acting up and the Check Engine Light is on. This will allow for retrieval of the stored diagnostic trouble codes (DTCs). These codes serve as a starting point for any further diagnostics. If you need help, a qualified technician from YourMechanic can take a look at the car for you.

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. Check engine light spontaneously comes on

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: Engine knocking noise, smoke, exhaust smoke

Hello. There are several possibilities for the engine knock. It could be caused by a busted piston, broken valve, or something internal in the engine. The smoke may be due to an internal damage on the engine block and/or oil...

Q: Break Pedal Started to make noise when pressing and releasing it

Hello there, a variety of issues will cause noise when the brake pedal is pressed and released on your 2002 Chevrolet Tracker. The most common issues is the pedal return spring, the pedal mount, or the brake pedal rod itself....

Q: Can you drive a car with a bad throttle body?

From your post I presume that you have checked the codes and got a throttle body code. The car may still seem to be okay and you want to know if it is safe to drive. The answer is: probably....

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...
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...