Car not starting when warm

Tiny
LEATICIA ANINYEI
  • MEMBER
  • 2007 HONDA CIVIC
  • AUTOMATIC
  • 120 MILES
In the morning the car starts. But when I drive in the traffic for distance and park. The car will not start immediately until after about 20 minutes when the engine has cooled down.
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Tuesday, May 4th, 2021 AT 4:04 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

What you described sounds like a bad crankshaft position sensor. When they start to fail, heat adversely affects them. The easiest way to check is either check for spark to the spark plugs when it won't start, or attach a live data scan tool and check for an RPM signal when cranking (no start). Here is a link that shows how to check for spark. This will need to be done when the vehicle fails to start.

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Do me a favor. Take a look through this link to see if it mirrors what you experience:

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

If you find it is bad, here is a link showing how in general how one is replaced:

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

The pictures below include the directions specific to your vehicle for replacement and the relearn procedure. Note, the relearn can be done without a scan tool. I included that procedure as well. If you look at the last pic, it shows the sensor (CKP) location.

Let me know if this helps or if you have other questions.

Take care,

Joe

See pics below.

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Tuesday, May 4th, 2021 AT 8:55 PM

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