rossp

iTrader: (3)

I just finished my swap and I am getting code p1810 for the tfp switch circuit. When the code is current the won't lock without being commanded through go tuners and it won't allow manual downshift to second or first. I don't have a park neutral safety switch on the trans and I'm wondering if that's what's causing this code? I can clear the code and the trans works perfect. Would deleting that code in the tune be an option?

clinebarger

The Transmission Fluid Pressure Switch Manifold is mounted to the Valve Body, IIRC off the top of my head.....P1810 is for "Illegal TFP Switch Combinations"

This needs to be fixed!! You either have a wiring issue or a malfunctioning TFP Manifold, If your in the DFW area....Ill give you a known good used one.

rossp

iTrader: (3)

Im hopeful and fairly positive its not a wiring problem. The car was originally a 6 speed car so the wiring wasnt there. I have a main trans harness pinned into the pcm. Is there any way to test the switch?

clinebarger

The PCM TFP DTC P1810 sets when the TFP switch indicates the following:
-An illegal gear range
-DRIVE4, DRIVE2 or REVERSE position before and after start-up
-PARK/NEUTRAL with a ratio greater than 1.05
-REVERSE with ratio indicating outside of REVERSE
-DRIVE4, DRIVE3, DRIVE2 or DRIVE1 with ratio indicating REVERSE While DTC P1810 is present, the PCM assumes DRIVE4 for shift pattern, sets line pressure to maximum, freezes shift adapts, and forces TCC ON with 4th gear commanded. (Can vary depending on calibration)


Combinations......

clinebarger

rossp

iTrader: (3)

I triple checked all my wiring and took my time doing all of it. I will check the tfp switch wires one more time. If all is good then I will probably set the code to no error reported until I have a chance to drop the pan. As long as the code isn't set the car drives perfect (other than my nasty vibration from the swap I'm still tryin to get figured out).