Honda Civic 08 has check engine light on, and advised to use HDS scanner to pinpoint the problem.
Car model and year:
Honda Civic 08
Check engine light on and the FLashing green Light next to D. The OBDII came back with 0756 Shift Solenoid B Performance or Stuck Off.
PCM operates shift solenoid B to supply line pressure to shift valve B in the valve body. PCM monitors mainshaft and countershaft speeds to determine gear ratios…..
If an improper gear ratio is output at the time of a shift, the pcm figures the shift solenoid did not do its job and sets the code.
I found some info that says codes P0756 and P0847 can be caused by the 3rd clutch pressure switch sticking ON, but you only have one of the codes..So that’s out.
So….There’s drain the fluid through a strainer and check for metal and clutch debris steps already mentioned…
Then…See if the HDS scanner can make the valve click on command
Drive with the HDS and see if the self test passes or fails.
What I’m reading is mostly about trying to decide if the solenoid should be replaced or if the trans should be replaced.
Solenoid could be sticking, it’s teensy little filters could be clogged with debris, either of those could be caused by an internal trans failure, clutch wear/failure, or TCC wear/failure.
If the valve body (shift valve B) is having a problem that is causing the incorrect shifting, that’s an internal trans problem and a solenoid won’t fix it.