Skip the auto shop - Our mechanics make house calls

Q: My car starts and then dies several times before it will stay running, but only when it's cold

asked by on

When I go to start my Toyota it will start then dies does this several times then will stay running. Changed the fuel filter and mass flow sensor also took it to the shop and they couldn't find anything wrong.

My car has 213000 miles.
My car has an automatic transmission.

A: Hi there. One of the most overlooked issues...

Hi there. One of the most overlooked issues that can cause hard starting when it’s cold is a malfunctioning engine coolant temperature sensor. If the coolant level is low, the coolant temperature sensor can send false information to the computer, causing a hard start or a cold start poor running condition as you’re describing above. The best way to diagnose this is to connect a digital scanner to the sensor and manually compare the temperature on the sensor to the temperature on the meter. If you don’t have access to this, contact a mobile technician, such as one from YourMechanic, to come and complete an inspection and diagnose why your car is hard to start in cold weather.

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

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: Tailgate handle not working properly

The lock actuator is one part to locking system. There is also the latch and the rods or cables that connect the electronic lock actuator to the latch. The rods/cables are locked in place by small plastic clips. If these...

Q: Truck will not shift out of park.

There are a few things to check. Check fuse #9 carefully. Sometimes fuses look ok from the top but are actually blown. Use a multimeter to ensure the fuse has not gone bad. Also double check the brake pedal...

Q: O2 sensors

Oxygen sensors don't work in that voltage range. Oxygen sensors range from .1 to .9 volts. When the vehicle is running normal the sensor ranges between .4 to .6 volts. The O2 voltage should change constantly going above and below...

Related articles

What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.