Code P1870

NCBANGA1

MEMBER
1999 HONDA PASSPORT
3.2L
6 CYL
4WD
AUTOMATIC
150,000 MILES

Error code p1870 CVT, Speed change control valve assembly circuit. How to fix it?

Saturday, February 27th, 2021 AT 8:14 AM

1 Reply

KASEKENNY

MECHANIC
18,907 POSTS

I attached the info for this code. However, this is for an auto transmission. If you have a CVT the idea is the same but the correction is different.

This code is saying that the torque converter is slipping too much and that requires replacement. However, in your transmission this could mean the steal belt is slipping causing this issue.

We can run through this testing and find out if it is the converter or if you have noticed any slipping in any other gears then it is the belt.

https://www.youtube.com/watch?v=ZC7xHVMKLRw

Let me know if you have questions or what you find with this. Thanks

Images (Click to make bigger)