P0781 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0781 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 P0781 code.

What Does P0781 Code Mean?

OBD-II Code P0781 is defined as a 1-2 Shift

The Transmission Control Module (TCM) uses hydraulic pressure an electronic solenoids to select and hold various gears in the transmission. When the TCM detects that the transmission is not holding the requested gear, it will tell the engine control module (PCM) to set code P0781.

P0781 Symptoms

• Transmission may not shift properly

Common Problems That Trigger the P0781 Code

• Transmission Control Module (TCM) failure
• Transmission fluid level is low
• Transmission shift solenoid failure
• Transmission valve body failure
• Wiring issue

Common Repairs Needed for the P0781 Code

• Automatic Transmission Fluid/Filter Change