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P0700 HONDA Description
The Transmission Control Module (TCM) monitors the malfunction of
sensors and actuators relating to transmission control. When the TCM
detects a malfunction with the control, a signal is send to the Engine
Control Module (ECM) to trigger the Engine Light or Service Engine Soon light. The ECM stores the P0700 code and it means the TCM detected a malfunction with the transmission control.
To clear the codes is the easy part, you can use a scan tool or remove the battery neg terminal for 5 mins but the codes will come back.
the PO700 is a code that tells you there is a ****** code which is the PO740 code. the PO740 code means the TCC circuit has a problem. this could mean there is a bad tcc solenoid or wire to tcc.
I would have this problem checked out asap. these vans have a lot of problems with the transmissions . your problem may be as simple as a solenoid pack problem. these vans with transmission problems can get costly, having it checked now would be wise. if you had a scan tool to get all ****** switches and solenoid value readings i would be able to help you check it but a ****** shop can check it with in an hour. good day.
PO700 is a code telling you there are codes in the TCM of some late model cars where the Transmission control module has lost connection to the PCM the vehicals main computer , And basically it happens when the TCM has a issue within itself or the transmission that sets a code and it sends a request for the PCM to illuminate the SES or CHECK engine light. PO740 is a chrystler specific code that involves your Tourqe Converter Clutch Circuit (specifically The TCC solenoid) this code if not repaired quickly could cause major transmission problems....slipping out of gear....not shifting from first to second properly and just all around trans problems...eventually leading to no shifting at all...I highly recommend fixing it soon.