Skip the auto shop - Our mechanics make house calls

Q: will a temperture switch cause an engine not to start?

asked by on

I replaced the icm in the distributor, it started then once it heated up it shut down. would not start till the next morning, the same thing it heated up it shut down. I pulled the code 15, I was told to unplug the temp switch and it should still run? will the temp switch cause it not to start at all? Or could it be the map sensor, or fuel position sensor? I am going to try the temp switch first.

My car has 96000 miles.
My car has an automatic transmission.

A: If the computer set code 15, I would replac...

If the computer set code 15, I would replace the coolant temperature sensor. Check the connector for it as well. If it is corroded or damaged, solder in a new connector. This sensor can cause the engine not to start. Unplugging it will work if the sensor itself is bad, but if the connector is bad, it will not have any effect. Sometimes coolant seeps through the sensor, into the connector. This causes an electrical resistance that will change the reading that the computer detects.

If the engine still stalls after this repair, unplug one sensor at a time and see if it starts. Do this for the MAP, and TPS. If that doesn’t work, it could be the pick-up coil in the distributor, or the ignition coil. The pick-up coil will cause no spark, and no injector pulse. A faulty ignition coil will cause no spark.

I’d suggest getting your car inspected by a certified technician, such as one from YourMechanic, who can diagnose your starting issue and help you fix it accordingly. Good luck.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: When the clutch is pushed in the RPMs jump to 3,000/3,500. I have replaced many sensors, and it has a new clutch and fuel pump.

An irregular engine idle speed can be caused by a wide variety of issues. If the issue appear to be intermittent, then it may be possible that it is electrical in nature, possibly related to the fuel, ignition, or engine...

Q: When I rev it it has a hard time.

This is tough to diagnose without more info, however it could be potentially some things like a faulty mass air flow sensor or throttle position sensor. Either of these two parts will have a negative impact on fuel/air flow which...

Q: Electronic throttle control light is on

Newer cars don't have a choke like the old cars did. The throttle body actually has a small gap that acts as the choke. If this gap gets clogged, and it does from time to time, the car wont start....

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...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...