Code 1810 - top valve position switch circuit

abrad

Sr. Member
Joined
Feb 20, 2007
Messages
164
Points
18
Location
New York
Make
Pontiac
Model
Grand Prix
Year
2001
Miles
130,000
Engine
3.8
Hi guys. Bought this car for my daughter-in-law to fix up. Needs brakes and exhaust work, and a few other things.

Up front caveat - I’m a noob at transmissions!

Its got a code showing - P1810 - transmission fluid pressure valve position switch circuit.
Apparently this is a common problem that was due to crappy parts getting clogged. Trying to find the actual part online has me going in circles. What I’ve found on rockauto is running about $40. Do I need to drop the pan to install this, or is it an outside access? I’ve seen some stuff showing an entire manifold that gets replaced.

Obviously, if it’s inside, I’ll be replacing the pan gasket and fluid. Thanks in advance!
Andy
 

paulo57509

Full Member
Joined
Apr 9, 2014
Messages
51
Points
8
It appears GM used two different kinds of Transmission Fluid Pressure (TFP) manual valve position switches depending on the electrical connector. I don't know how you tell which one you need looking from the outside.


Yes, you need to drop the pan to get to it.
 

grcauto

Hero Member
Joined
May 29, 2014
Messages
796
Points
28
Need a decent scan tool to monitor the switch or just take a shot at replacing the switch.
 

abrad

Sr. Member
Joined
Feb 20, 2007
Messages
164
Points
18
Location
New York
I actually went to the GM dealership, had them look up the part # via the vin. Now, just need to order and then git er dun!
 
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