P1810 BUICK, CADILLAC, CHEVROLET, FORD, GMC, PONTIAC, SATURN: TRANSMISSION FLUID PRESSURE VALVE POSITION SWITCH CIRCUIT
POST UPDATED IN May, 2023
P1810 BUICK, CADILLAC, CHEVROLET, FORD, GMC, PONTIAC, SATURN: TRANSMISSION FLUID PRESSURE VALVE POSITION SWITCH CIRCUIT
The automatic manual Transmission Fluid Pressure (TFP) valve position switches consist of five pressure switches, two of which are normally closed and three of which are normally open. A Transmission Fluid Temperature sensor (TFT) is also included, and they are all combined into one body-mounted unit.
The PCM (Powertrain Control Module) provides the required ignition voltage for each range signal. Once connected to at least one of the circuits via the pressure switch combinations, the PCM detects which manual valve position has been selected. Subsequently, the Powertrain Control Module compares the actual voltage combination of the switches with those indicated in a table of combinations that are stored in its memory. The manual valve position switch of the TFP valve does not differ between the stop and neutral, because the valve bodies’ pressures are very alike.
The P1810 OBDII fault code is set on Cadillac, Chevrolet, Ford, GMC, and other vehicles when the PCM detects an invalid state from the TFP manual valve position switch by decoding the manual valve position switch inputs.
The reasons for the OBD2 DTC P1810 code being set are:
The corresponding steps to troubleshoot the P1810 OBDII diagnostic code are: