P0878

Transmission Fluid Pressure Sensor/Switch D Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Incorrect gear shifting
Transmission transition to emergency mode
Jerking when shifting gears
Check engine light comes on
Reduced transmission efficiency

Causes

Transmission fluid pressure sensor malfunction
Open or short circuit in the sensor circuit
Connector problems or contact corrosion
Low transmission fluid level
Mechanical problems in the transmission hydraulic system

How to Fix

Check the level and condition of the transmission fluid
Visually inspect the sensor wiring and connectors
Test the resistance and output of the sensor
Check the continuity of the circuit to the control unit
If necessary, replace the pressure sensor

Related codes

P0876 P0877 P0879