Skip the auto shop - Our mechanics make house calls

Q: The car continously switches off in the morning, basically it has a cold start but once on the road it is fine

asked by on

My car continuously switches off in the morning but once it is on the road and the engine heated a little it is fine. We took it to the mechanic and he says that he cannot understand why the cold start. Once on a long stretch their is absolutely no problem with the vehicle.

My car has 282000 miles.
My car has a manual transmission.

A: Hello. Issues during cold start can be caus...

Hello. Issues during cold start can be caused by many things. A few common causes are issues with the engine management or fuel system. Virtually all engines are designed to run with an increased amount of fuel during cold starts, to help the engine start and warm up when it is cold, and to run differently when up to temperature or under heavy loads. The computer uses the fuel and engine management systems to make these calculations, and if there is an issue with either of these systems, perhaps in the form of a faulty sensor they may throw off the computer's calculations and cause performance issues. I would start by looking at the vehicle's fuel and engine temperature sensors, as these are two of the main engine management sensors that function based on temperature. If you would like a precise diagnosis, have a certified professional, like one from YourMechanic, pinpoint the cause of the cold starting problem so that this can be repaired appropriately.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Steering wheel hard to turn in 2009 Toyota Corolla

If your steering wheel is tightening and and you're having trouble steering, that means that your serpentine belt may have broken and needs to be replaced. Because your Battery Light has come on, it is possible that your battery and/or...

Q: My brakes are not working, parking or standard,

Hi there: If you have brake fluid that is leaking near the tires, your entire brake system will be rendered broken. The brake system depends on solid hydraulic pressure in order to effectively work. When brake fluid is leaking, one...

Q: Car runs for 20 minutes then shuts off. It turns back on 30 minutes later.

Hi there. Check the battery cables to see if they are loose and if there is any corrosion. Check the condition of wires to the starter to ensure that they are tight and there is no corrosion. If the battery...

Related articles

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...
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...
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.