P0846 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0846 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P0846 code.

What Does P0846 Code Mean?

OBD-II Code P0846 is defined as a Transmission Fluid Pressure Sensor/Switch "B" Circuit

The Transmission Fluid Pressure Switch allows the engine's control module (PCM) or Transmission Control Module (TCM) to use hydraulic fluid to engage the clutches in the transmission to allow for smoother shifting while driving. If the PCM or TCM detects an issue with the hydraulic clutch or the pressure switch, the PCM or TCM will set code P0846.

P0846 Symptoms

• Increased fuel consumption
• Transmission may not shift properly

Common Problems That Trigger the P0846 Code

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