LoCoNights
Member
Hey everyone. I have a question. I put up a post 2 months ago about an issue I had with my accord. I was driving home one day and the CEL came on and the car wouldn't go pass 4,000 rpms. Pulled the codes when I got home.
P1686 A/T FI Signal B Low Input
P1687 A/T FI Signal B High Input
Which I researched means
31 Automatic Transmission Signal "B" defective circuit or unplugged / defective sensor
I cleared the codes and waited to see how long it too for it to come back. That was 2 months ago and still not CEL. The transmission is acting funny though. When coming to a stop after accelerating, the car will hesitate before coming to a complete stop. My mechanic described it as the car not shifting smoothly into neutral. The car has also shifted rough twice in the past 2 months. My mechanic pointed out a solenoid under the hood that he thought might be the problem.
This part
Image of part under hood
Link to auto parts store of part
He was hesitant to change anything because there was no CEL on at the moment. But I had an idea. The CEL code I had mention a B sensor being bad, and of those **** solenoids is called Shift Solenoid B maybe that could be what it is talking about. I just have no idea what that shift solenoid does or even if that could be whats wrong. Its a pretty expensive part, so i didn't wanna jump in and buy it before speaking to you guys. Thank you so much for an opinions you guys have.
P1686 A/T FI Signal B Low Input
P1687 A/T FI Signal B High Input
Which I researched means
31 Automatic Transmission Signal "B" defective circuit or unplugged / defective sensor
I cleared the codes and waited to see how long it too for it to come back. That was 2 months ago and still not CEL. The transmission is acting funny though. When coming to a stop after accelerating, the car will hesitate before coming to a complete stop. My mechanic described it as the car not shifting smoothly into neutral. The car has also shifted rough twice in the past 2 months. My mechanic pointed out a solenoid under the hood that he thought might be the problem.
This part
Image of part under hood
Link to auto parts store of part
He was hesitant to change anything because there was no CEL on at the moment. But I had an idea. The CEL code I had mention a B sensor being bad, and of those **** solenoids is called Shift Solenoid B maybe that could be what it is talking about. I just have no idea what that shift solenoid does or even if that could be whats wrong. Its a pretty expensive part, so i didn't wanna jump in and buy it before speaking to you guys. Thank you so much for an opinions you guys have.
