I called the transmission shop gave the code (.

Tiny
HUNTRS
  • MEMBER
  • 1999 CADILLAC ESCALADE
  • 143,000 MILES
I called the transmission shop gave the code (1870) and I was told it would cost around $1600 to repair, I just want to know if the transmission needs to be completly over hauled. Also could the transmission pressure manual valve position switch be bad, and would it cause this problem.
Wednesday, October 17th, 2012 AT 7:37 PM

2 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
You need to have a shop look at it first. A guess over the phone is hardly a diag.

Yes, the valve can be replaced but damage may be done.

The price is good.

Get another opinion.

Roy
Was this
answer
helpful?
Yes
No
Wednesday, October 17th, 2012 AT 7:48 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
A TFP manual valve position switch (Pressure Switch Assembly) malfunction could
set DTC P1870. Ensure final drive ratio matches PCM calibration. The following
mechanical conditions could set DTC P1870:

lShift solenoids.
TCC solenoid.
TCC PWM solenoid.
Internal transmission failures.
Engine misfire.
Transmission range switch DTC.

Code indicattes slipping so high possibility the trans has to be rebuilt.
Was this
answer
helpful?
Yes
No
Wednesday, October 17th, 2012 AT 7:51 PM

Please login or register to post a reply.

Related Transmission Gear Position Sensor Content

Neutral Safety Switch Test
GUIDE
Neutral Safety Switch Test
The functionality of the neutral safety switch has changed greatly through the automotive development era, what was once a simple switch for the reverse lights and starter...
VIEW MORE