2017 Volvo S90 OBD2 Code P0871 Transmission Fluid Pressure Sensor/Switch C Circuit

OBD II Fault Code

• OBD II P0871

OBD-II Code Transmission may not shift properly is defined as a Transmission Fluid Pressure Sensor/Switch "C" Circuit

The Transmission Fluid Pressure Sensor tells the Transmission control module (TCM) the pressure of the fluid going through the transmission. When the TCM detects an incorrect signal from the Transmission Pressure Sensor, it sends a signal to the engine control module (PCM) to set code P0871.

Transmission may not shift properly Symptoms

• Increased fuel consumption
• Transmission may not shift properly

Common Problems That Trigger the P0871 Code

• Transmission Control Module (TCM) failure
• Transmission fluid pressure sensor failure
• Wiring issue