Thread: p1810 after replacing all the solenoids

Originally Posted by BillBoost37

I'm pretty sure you have internet and can search on that code to at least tell us the name.

I'm here to help. You gotta bring a little something to the table though.

the exact name is-
TFP (Transmission Fluid Pressure) Valve Position Switch Circuit

here is a write up i found-
The automatic transmission fluid pressure (TFP) manual valve position switch consists of five pressure switches (two normally-closed and three normally-open) and a transmission fluid temperature (TFT) sensor combined into one unit. The combined unit mounts on the valve body.
The powertrain control module (PCM) supplies ignition voltage for each range signal. By grounding one or more of the circuits through various combinations of the pressure switches, the PCM detects which manual valve position you select. The PCM compares the actual voltage combination of the switches to a TFP manual valve position switch combination table stored in memory.
The TFP manual valve position switch cannot distinguish between PARK and NEUTRAL because the monitored valve body pressures are identical. With the engine OFF and the ignition switch in the RUN position, the TFP manual valve position switch indicates PARK or NEUTRAL. Disconnecting the AT inline 20-way connector removes the ground potential for the three range signals to the PCM. In this case, with the engine OFF, and the ignition switch in the RUN position, D2 will be indicated.
When the PCM detects an invalid state of the TFP manual valve position switch circuit by deciphering the TFP manual valve position switch inputs, then DTC P1810 sets. DTC P1810 is a type B DTC.

and the explaination the local mechanic gave me-
The TFP is sensing too much pressure in the transmission and the most likely cause is the map and the epc. that will be 10 million dollars(just the jist of what he said of course :P)

symptoms
I replaced both. At first it wouldnt shift out of second now i got all my gears back and Its hard to get it into over drive.(assuming this is because of the pressure I still have overdrive though) Shifting does feel very hard, and at the moment I also have my "svs" light and "trac off" light stuck on.