Will not start after replacing the key?

2004 TOYOTA SEQUOIA

240,000 MILES • 4.7L • V8 • 4WD • AUTOMATIC

DAVOWS@#1

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New key made, theft light goes off, but engine has no spark. Ran before new key made.
Sometimes runs for 1 second, then no spark.
No codes on scanner.
Will it throw a code for CPS by just cranking/no start?

Feb 5, 2021 at 1:20 PM

JACOBANDNICKOLAS

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110,175 POSTS

Hi,

It could be the crankshaft position sensor, but it's odd that it happened after the key replacement. If you have a live data scan too, connect it and see if there is an RPM signal from the sensor while cranking. Also, take a look through this link and let me know if it mirrors what you are experiencing:

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

To answer your question about the code / crank sensor, there are situations that a bad sensor will not set a code. It's explained in the aforementioned link.

Also, here is a link you may find of interest:

https://www.2carpros.com/articles/stall-at-idle

Let me know what you find or if you have other questions.

Take care and God Bless,

Joe

Feb 5, 2021 at 8:07 PM

DAVOWS@#1

MEMBER
2 POSTS

Thanks!
A friend brought over a newer code reader, and it called out B2799.
Immobilizer code!
I think that we have it pinned down now!! Thank you so much for your prompt response! Cheers!

Feb 5, 2021 at 9:23 PM

JACOBANDNICKOLAS

CERTIFIED EXPERT
110,175 POSTS

Hi,

You are very welcome. I'm glad you determined the problem. Please feel free to come back anytime in the future if you need help.

Take care and God Bless,

Joe

Feb 6, 2021 at 4:58 PM