ECM Code P0700C

SPOOKYLTLDAME

MEMBER
2003 CADILLAC CTS
60,000 MILES

What do I do about this code? Any way to reset? Where is the 02 sensor located?

Tuesday, December 20th, 2011 AT 4:32 PM

5 Replies

RASMATAZ

MECHANIC
75,992 POSTS

P0700 - Transmission control system malfunction.

Try disconnecting the battery and the TCM for thirty minutes and then reconnect and see what happens. Most likely it is going to be the TCM if the code returns.

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Tuesday, December 20th, 2011 AT 4:45 PM

SPOOKYLTLDAME

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3 POSTS

Where is the TCM located, please?

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Tuesday, December 20th, 2011 AT 4:56 PM

RASMATAZ

MECHANIC
75,992 POSTS

Transmission control module at right front side of engine compartment.

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Tuesday, December 20th, 2011 AT 5:00 PM

SPOOKYLTLDAME

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3 POSTS

Thanks. Where is the PCM located, please?

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Tuesday, December 20th, 2011 AT 5:26 PM

FACTORYJACK

MECHANIC
4,159 POSTS

A code P0700 in the PCM, is nothing other than an informative code, that indicates the transmission control module has requested the MIL(check engine light) to illuminate. From there, you would need to request fault codes from the TCM. This does not indicate you have a transmission control module that is faulty. Since the transmission control module can not illuminate the light itself, it requests the PCM to do it, and sets this code. You need to take it one step further, and find out what DTC(s) are present in the TCM. The PCM is located on a bracket over the right hand (passenger) side cam cover.