P0966 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0966 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 P0966 code.

What Does P0966 Code Mean?

OBD-II Code P0966 is defined as a Pressure Control Solenoid "B" Control Circuit Low

The Transmission Fluid Pressure Solenoid 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 electrical circuit to or from this solenoid, the PCM or TCM will set code P0966.

P0966 Symptoms

• Increased fuel consumption
• Transmission may not shift properly

Common Problems That Trigger the P0966 Code

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