Transmission will slip into neutral while driving, codes P0401, P0715, P0740, P0401

SAVAGEBRAD

MEMBER
1997 HONDA ACCORD
2.2L
4 CYL
2WD
AUTOMATIC
189,000 MILES

Transmission will shift into gear and then while driving it will eventually slip into neutral and will have to turn the car off and back on to move a couple feet. Then repeat just to move the vehicle. It threw these codes so I thought it might be a TCC solenoid:

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Hi and thanks for using 2CarPros. Com.

There can be a few problems causing this. The first code, P0715 deals with the main-shift/counter-shaft speed sensor. The first two pictures I attached are a diagnostic flow chart to locate and identify this problem. Please keep in mind, this code does not always mean there is an electrical problem in the main-shaft or counter-shaft speed sensor circuit; it may also indicate a mechanical problem in the transmission. Any problem causing irregular counter-shaft to main-shaft speed difference can cause this code.

A P0401 deals with the EGR so I do not think that has anything to do with your problem.

Code P0740 does deal with the TCC solenoid. I have attached the diagnostic flow chart for that too. It is pictures 3 and 4.

Let me know what you find after reviewing these tests.

Take care,
Joe

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