Intermittent no start, I changed the starter battery ignition switch?

IFYUSER

MEMBER
2011 NISSAN SENTRA
2.0L
4 CYL
2WD
AUTOMATIC
143,000 MILES

The car has a smart key, and I changed the starter battery ignition switch and neutral safety switch and still get an intermittent no start sometimes. When it doesn't start it takes like five minutes for it to start, then it starts.

Sunday, September 18th, 2022 AT 8:35 PM

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,643 POSTS

It sounds like the BCM or NATS antenna amplifier is going out which controls the vehicle immobilizer. To be sure we need to do a CAN scan. You can get a CAN scanner (Controller Area Network) from Amazon for about $36.00.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

Here is a scanner link:

https://amzn.to/3eCqWWw

Here is the immobilizer wiring diagram so you can see how to works and how to replace the BCM in case you need it after the scan. The BCM will need to be programmed which the rebuilder will need to know your VIN number. Check out the images (below). Please let us know what happens.

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Monday, September 19th, 2022 AT 1:39 PM

IFYUSER

MEMBER
54 POSTS

Can the keyless entry antenna in the trunk cause this? I noticed it was hanging loose in the trunk and I sometimes hear a snapping sound like an electrical shock like there's a short from the back of the car.

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Monday, September 19th, 2022 AT 9:59 PM

KEN L

MASTER CERTIFIED MECHANIC
47,643 POSTS

Yes, that can do it, can you upload an image of what you are seeing? Here is information on the keyless entry receiver. Check out the images (below). Please let us know what you find. We are interested to see what it is.

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