I have the check engine light. P0740 tcc circuit malfunction. What can I check to fix this I tried everything I can think of? Nothing is wrong with the transmission it shifts with no problem and the fluid is full and fresh genuine Honda tranny fluid. I reset ecu and PCM by removing thE fuse for it and it went off then I went 55mph and stayed for few minuutes and it came on it's done this a few times all at 55mph. Please help. Thank you

 

 

I have the check engine light. P0740 tcc circuit malfunction. What can I check to fix this I tried everything I can think of? Nothing is wrong with the transmission it shifts with no problem and the fluid is full and fresh genuine Honda tranny fluid. I reset ecu and PCM by removing thE fuse for it and it went off then I went 55mph and stayed at 55mph for few minuutes and it came on it's done this a few times all at 55mph. Please help. TY

I changed the top solenoid I think its the lockup solenoid.

I have a d16y8 head with a d16y7 block could this have anything to do with it?

The transmission was just changed the old one had gear problems, they were slipping.

1998 honda civic ex automatic

 

Only one thread per topic is allowed. Threads merged.

 

ok ty, but [lease read the extra information i added and please answer the other questions.

 

Please carefully read the diagram.

-Have you checked for additional codes that blink from the D4 light when the service connector is jumped?

-Have you checked the line pressure?

 

I didnt check the lines what tool do you use for that?

It's only p0700 and p0740 and the d4 light has never blinked.

 

also i tried changing the lockup control solenoid and same thing.

 

Jump the service connector see whether the D4 lights blinks any codes besides 40.

 

hey, first i checked the solenoid and heard the clicking i did that diagnostics. Also i did the service connecter thing and both the d4 light and the check engine light was blinking. the ecu reads p0740 and p0700. me and my mechanic dont have these guages, what do i do next?

 

Check at auto parts and tool stores for the necessary gauges and adapters. Otherwise you are left with replacing the transmission and torque converter.

 

Are these guages expensive? also my car doesnt have the dipstick it came with it has a dip stick form another car. Cou,ld this mean anything.

 

So you have no idea whether the transmission is over or under filled with ATF? Find a dipstick at a junk yard.

 

should i check the resistance of the linear solenoid and shift solenoid. Also could it be a speed sensor or engine temperature coolant sensor?

 

No

 

i checked the owners manual and the dipstick is acutally the right one. ill check the fluid tommorow. It has to be between the h and c right?

 

 

Its over the upper mark