1999 Cadillac Escalade Called Transmission Shop Gave Code 1870 Told Would Cost

1999 CADILLAC ESCALADE
143,000 MILES
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HUNTRS
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  • 3 POSTS
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.
Oct 17, 2012 at 7:37 PM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
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
Oct 17, 2012 at 7:48 PM
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KHLOW2008
  • ✓ASE Certified Mechanic
  • 41,814 POSTS
  • ASE Certified Mechanic

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.
Oct 17, 2012 at 7:51 PM
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