Q: Rough idle, stalls when accelerating, engine shuts down while driving with no fault codes.

asked by on February 04, 2017

The car idles rough. When accelerating, the engine hesitates to accelerate. That is, the throttle does not respond seamlessly to your request, making driving somewhat rough.

The worst part of it though is that the engine can just shutoff while driving, with the dashboard lights coming on and no check engine or fault codes. The car can be restarted immediately though. It normally occurs when the Air Condition is on (surprisingly it occurred today without the AC being on) irrespective of driving speed (both at high and low speeds) making driving VERY RISKY!

The plugs and oil have been changed. OBD Scan presently shows P0128, P0420, P0430. I also have videos of live-stream of engine parameters from the scanner which I can send if needed.

The car is an American spec but I am using it in Nigeria.

Your advice will be highly appreciated

Thanks.

Paul

My car has 37487 miles.
My car has an automatic transmission.

Hi there. The issue is the coolant thermostat temperature sensor. The sensor is malfunctioning causing the computer (ECM) to think that the engine is either too cold or too hot and causing the fuel mixture to be off. I recommend replacing the coolant temperature sensor. If you need further assistance with your stalling issue, then seek out a professional, such as one from Your Mechanic, to help 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

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

Noise coming from engine compartment when turning the heat on - 2006 Hyundai Tucson

Hello. Does the noise occur only with the heater or does it make the same noise with the A/C on as well? If so, you will want to direct your attention to the blower motor. The bearing can fail and...

How do I change the air intake control?

The air intake has two available settings: outside air (air from outside the vehicle is used), and recirculated air (air from inside the vehicle is recirculated). To turn on the recirculated air, press the Recirculated Air button on the climate...

Airbag light on.

A code scan of your airbag system will reveal why the light is on. Further diagnostic and research will determine which components needs to have a repair. A qualified technician, such as one from YourMechanic can assist you in diagnosis...

Related articles

How to Keep Your Car From Stalling
When When driving a car, we expect it to get us from point A to point B without any issues. It can become unnerving to drive if your car stalls randomly when coming to a stop, whether it is at...
The Best Used Cars to Buy If You Get Motion Sickness
For For people that suffer from motion sickness, even on the shortest car trip, riding in a vehicle can prove to be unbearable. What’s great is that there are a number of cars on the market that can help to...
The Best Used Cars to Buy If You're a Doctor Who Makes House Calls
If If you are a doctor who makes house calls, reliability is likely to be at the forefront of your mind when it comes to choosing a used car. You also expect a certain level of comfort. We have...