Q: Engine starts up on cold start, shakes/struggles, and then shuts off.

asked by on

When i start my engine up on a cold start, it starts up and shakes, as if it is struggling and then shuts off. I'm able to start it when i put my foot on the gas. This happens a couple times a week. I Changed the spark plugs and wires thinking that was the problem but instead it continued. ALso my check engine light is also on. When i got it check at autozone...it gave me several codes from o2 sensor, to catalytic converter. This wasn't the cause previously, this started after i changed my spark plugs.

My car has 200000 miles.
My car has an automatic transmission.

Hello. I’m not sure what is meant by saying the O2 sensor and catalytic converter problem codes were not the problem. Several component issues could cause the behavior you are seeing - from a dirty, clogged, or failing idle air control, a failing coolant temperature sensor (giving engine management a false "colder than it really is" temp signal) to a leak in the intake system or leaking injectors.

Problems with these components or the O2 sensor can be causing a "too-rich" mixture, making the engine run poorly and clogging the catalytic converter. Don’t dismiss the problem code from your Check Engine Light - they’re trying to tell you something useful. I would recommend having a certified mechanic, such as one from YourMechanic, come to your location to determine why the car is starting and dying and why exactly the Check Engine Light is on.

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. Engine starts up on cold start, shakes/struggles, and then shuts off.

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: Fuel filter leaking

Hi there. Fuel leaks are dangerous so it is important that it be repaired right away. If it is at the fuel filter, in some cases, replacing the fuel filter will take care of it. Your car uses quick connect...

Q: I just had a diagnostic performed on my car and the following error code came up P0299 boost control sensor.

Hi there. Check to see what the oil pressure is in the engine. If the oil pressure is low, then the P0299 code can appear. Also, check for the EGR operation and see if its sticking. A faulty EGR will...

Q: Car shakes when going over 60 MPH

This sounds like you have a problem with the front axles or speed sensors, along with front bearings failing. I recommend that you have a mechanic, such as ones from YourMechanic, come by and check your car for you, beginning...

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...
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.