Pressure switch codes Archives - Transmission Digest
Toyota U660E pressure switch issues

The complaint A 2010 Toyota Venza equipped with the 3.5-liter engine and the U660E transmission has a complaint of setting trouble codes P0872 “TFP Switch C” and P0877 “TFP Switch D.” The pressure switch assembly was ordered from the dealer. As a side note, the car came from a used car dealer. The transmission appeared

The Pressure is Off

Jon at Wilson Transmissions received a 2010 Venza with a 3.5L/U660E combo from a used car lot. All seemed to be working good other than many dash indicators lit up. After scanning the vehicle and finding pressure switch codes (P0872 for TFP Sensor/Switch C and P0877 for TFP Sensor/Switch D), Jon ordered a TFP switch/TFT sensor assembly from the Toyota dealer.

AS68RC Pressure-Switch and Performance Codes

When an Allison 1000/2000 transmission produces a pressure-switch code, it does not necessarily mean the pressure switch is faulty. A solenoid needs to stroke a valve, which then sends oil pressure to the switch to close it. If the solenoid is performing poorly, or the valve is sticking, the pressure switch will not close, causing the associated code to set.