Q: My car is jerking and the engine light is on.

asked by on

I have an 2002 Mazda tribute. It just got two catalytic converters fixed, it has mostly new hoses, a new radiator, and a new battery. It jerks a little and the engine light is on. It might be on because of a bad gas cap or crappy gas. So, I plan on getting a new cap and I've been using Shell with the middle grade gas. I'm hoping it's just that, but I would like to see if y'all might have a better idea. I just got it back from my mechanic, so I don't want to take it in if I don't have to.

My car has 196600 miles.
My car has an automatic transmission.

A loose or leaking gas cap will almost never be the cause of a poorly running engine. It will set the check engine light on and set an Evaporative System fault, but will not make the engine jerk or misfire. With the check engine light on now, a fault code is stored in the system and is most likely the cause of the rough running. The fault codes should be pulled from the system and a proper diagnosis performed to find the exact cause.

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. My car is jerking and the engine light is 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: Muffler dragging

Hi. If your muffler has fallen and is dragging on the ground then it more than likely has a broken bracket. It can also be a broken pipe. If you need further assistance, I recommend you have a mechanic, like...

Q: Sometimes, the lower gears are slow to shift (high RPM) when starting to drive from being stopped or almost stop 2012 Ford Escape

Hi there, The "slow shift" symptoms you are experiencing may be caused by a malfunctioning transmission internal speed sensor, or by a failing throttle position sensor (which communicates with the transmission controller). Either of these could cause the symptoms you...

Q: My car shows the Check Engine Light and DPF lights and coil light on the dashboard. What action should I take?

Hi. The EGR valve needs to be replaced and the passages to the EGR need to be cleaned. The EGR location is very tricky to get to so you may need a professional technician (such as one from YourMechanic) who...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.