P0946 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0946 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 P0946 code.

What Does P0946 Code Mean?

OBD-II Code P0946 is defined as a Hydraulic Pump Relay Circuit Range/Performance

The clutch uses hydraulic pressure to engage and disengage the clutch as well as shift gears. The Transmission Control Module uses a relay to control hydraulic pump that produces the pressure in the system. If the relay does not function as requested, code P0946 is stored.

P0946 Symptoms

• Transmission may not shift properly

Common Problems That Trigger the P0946 Code

• Hydraulic pump relay failure
• Transmission Control Module (TCM) failure
• Wiring issue