Car shuts off after car warms up, with P1212 and U1001 codes

Tiny
BARRINGTON JARRETT
  • MEMBER
  • 2003 INFINITI G35
  • 3.5L
  • 6 CYL
  • RWD
  • MANUAL
  • 138,000 MILES
My car shuts off by its self, it is not random at all, it is always after the car starts and idles for a few minutes, then shuts off.
From what I have done already:
•Changed both cams sensors.
•Changed crank sensor.
•Changed fuel pump.
Car still turns off at the same time after the car warms up.
The throttle body was disconnected once to cleaning but I have done all three relearns that is required after you disconnect it and still the same out come.

Some other things That I noticed, before the car shuts off.
Once the car starts and idles for a few minutes, the rpm gauge goes from 300 to 0, but the car still running, slip and VDC lights come on, then I hear the fuel pump cuts off. But the engine stays on running for a few seconds after the fuel pump cuts out.
Saturday, July 22nd, 2017 AT 4:18 PM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,600 POSTS
This is a CAN BUS problem meaning one of the modules is not talking to the PCM which can be a bad connection etc. You need a professional scanner to check this to see where the problem lies not an auto parts one. Make sure to check for a dead or weak battery as that can cause this as well. See picture.
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Saturday, July 22nd, 2017 AT 4:45 PM
Tiny
BARRINGTON JARRETT
  • MEMBER
  • 2 POSTS
I forgot to add that my battery is also new. From the my understanding the codes indicate that it is a TCS relating problem. But would this turn off the fuel pump?
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Saturday, July 22nd, 2017 AT 5:52 PM
Tiny
HMAC300
  • MECHANIC
  • 48,600 POSTS
If it is a CAN BUS problem it will turn off a lot of things. It is not communicating with VDC/TCS/ABS control unit like picture says or a bad connection normally a professional scanner can find where the problem lies.
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Sunday, July 23rd, 2017 AT 8:13 AM

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