Code P0700 low voltage to the TCM

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

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

WILLIAM530NCP

MEMBER
4 POSTS

What do I use to test it with?

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Tuesday, March 31st, 2020 AT 7:31 PM

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

WILLIAM530NCP