P0877 Fault Code

Transmission Fluid Pressure Sensor/Switch D Circuit Low

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0877 fault code indicates an issue with the Transmission Fluid Pressure Sensor/Switch D Circuit being low. This sensor measures the pressure of the transmission fluid, which is crucial for optimal transmission performance. When the circuit reading is low, it can signal potential problems in the transmission system.

What are the symptoms of the P0877 code?

When experiencing a P0877 code, you may notice the following symptoms:

• Transmission slipping or failure to engage gears
• Unusual noises coming from the transmission
• Delayed shifting or harsh transmission shifts
• Warning lights illuminated on the dashboard, such as the check engine light

What causes the P0877 code?

Several factors can lead to a low reading in the Transmission Fluid Pressure Sensor/Switch D Circuit including:

• Faulty transmission fluid pressure sensor or switch
• Damaged wiring or connectors related to the pressure sensor
• Low transmission fluid level due to leaks
• A malfunctioning transmission control module (TCM)
• Other transmission-related problems that affect fluid pressure

How to fix P0877?

To resolve the P0877 fault code, consider the following steps:

• Perform a visual inspection of the transmission fluid pressure sensor and its wiring for any damage or corrosion.
• Check the transmission fluid level and quality; top-up or replace the fluid if necessary.
• Replace the faulty transmission fluid pressure sensor or switch if it is determined to be malfunctioning.
• Clear the fault codes and test drive the vehicle to ensure the issue is resolved. If the fault reappears, further diagnostic testing may be required to identify underlying transmission problems.