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Code P0700 low voltage to the TCM

Tiny
WILLIAM530NCP
  • MEMBER
  • 2006 DODGE CHARGER
  • 2.7L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 178,000 MILES
My car went into limp mode and when I read the code it is p0700 and low voltage to the o2 sensors on both sides. I have checked the grounds and the fuses in both panels wondering how to test the TCM or PCM to find out witch one is going bad.
Tuesday, March 31st, 2020 AT 3:53 PM

6 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
I attached the testing for this DTC. If you only have this DTC in the PCM then it is just telling you that there is another code in the TCM. If this is the only DTC that you have then follow the testing and see what turns up. It will walk you through the issue.

Please let me know what questions you have and we can go from there. Thanks
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Tuesday, March 31st, 2020 AT 4:51 PM
Tiny
WILLIAM530NCP
  • MEMBER
  • 4 POSTS
What do I use to test it with?
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Tuesday, March 31st, 2020 AT 7:31 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
You need a scan tool to see if the code is active in the TCM. Do you have active codes in the TCM? Usually the P0700 is not your only code. While there is some testing for this code it is basically telling you to diag any codes in the TCM first.
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Wednesday, April 1st, 2020 AT 7:14 AM
Tiny
WILLIAM530NCP
  • MEMBER
  • 4 POSTS
It shows the P0700 and then it shows low voltage to the O2 sensors also.
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Wednesday, April 1st, 2020 AT 10:08 AM
Tiny
WILLIAM530NCP
  • MEMBER
  • 4 POSTS
And my scan tool is not good.
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Wednesday, April 1st, 2020 AT 10:09 AM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Okay. So is the issue still happening or does the vehicle drive properly and this happens intermittently?
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Thursday, April 2nd, 2020 AT 4:01 PM

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