Auto stop feature

Tiny
SHOCKEARL
  • MEMBER
  • 2014 CHEVROLET MALIBU
  • 2.5L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
Here I go again. Get to stop light car auto cuts off when you press the brake lift you foot off brake car cranks but does not start. Use key cranks no start. Wait 15 minutes use key car starts no problem. It’s not the battery, not cable. To me it seems like a relay is not closing when you take your foot of the brake wait and let it cool of relay closes starts right up. My problem is I don’t know where relays are or have wiring diagram for that section of the car.
Wednesday, July 31st, 2019 AT 12:16 PM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Good afternoon,

This sounds more like a lack of fuel. I would start by checking the fuel pressure to be sure the pump is not failing when it stops.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Can you hear the pump run with the key on when it will not start?

https://www.2carpros.com/articles/car-cranks-but-wont-start

Is the check engine light on?

Roy
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Wednesday, January 27th, 2021 AT 2:45 PM
Tiny
SHOCKEARL
  • MEMBER
  • 12 POSTS
This won't start only happens when auto stop engages, all other times car cranks right up with no issues only happens when I let auto stop engaged so I just pop it neutral when I get to a stop light.
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Wednesday, January 27th, 2021 AT 2:45 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
That would tell me the body control module as it controls it.

Again, do you have any codes?

One way to make it not work is just before you stop, let off the brake and then apply it again and it will idle not stop.

Roy
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Wednesday, January 27th, 2021 AT 2:45 PM
Tiny
SHOCKEARL
  • MEMBER
  • 12 POSTS
It was the crankshaft sensor I got it replaced the car runs great again thank you.
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Wednesday, January 27th, 2021 AT 2:45 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Nice work, we are here to help, please use 2CarPros anytime.
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Wednesday, January 27th, 2021 AT 2:45 PM

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