Will not start when warm?

Tiny
MANWARRENSARAH
  • MEMBER
  • 2003 HONDA CIVIC HYBRID
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 215,000 MILES
It will start and get me to the store but if I turn it off it won't start again until it sits for about 30 minutes.
Wednesday, September 22nd, 2021 AT 9:46 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,569 POSTS
Hi,

Based on your description, it sounds like the crankshaft position sensor may be going bad. When they start to fail, heat has an adverse effect on them causing a loss of ignition spark. Once they cool off, they work again.

Do this first: Take a look through this link and let me know if it seems to mirror what you are experiencing.

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

Now, when it won't restart, see if the tachometer moves at all when cranking. Or, if you have a live data scan tool, see if there is an RPM signal when cranking. If there isn't or the tachometer doesn't move, chances are the sensor is bad.

If you determine the sensor is bad, here is a link that explains how in general one is replaced:

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

If you look at the pics below, they are the directions specific to your vehicle for replacement. Pic 1 shows the location and the remaining picture is the procedure.

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

Take care,

Joe

See pics below.
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Wednesday, September 22nd, 2021 AT 5:22 PM

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