What does P0878 Mean? The P0878 code means that the PCM has detected an abnormal pressure reading from the transmission fluid pressure sensor or switch. The pressure detected can be either too high or low when compared to manufacturer specifications. engine code P0878P0878 fixobd P0878dtc P0878obd code P0878obd2 P0878P0878 car codediagnostic code P0878car code P0878check engine code P0878fehlercode P0878P0878 fiatcodigo P0878codigo falla P0878P0878 kody b??dówcodigo de falla P0878 What are the common causes of P0878 ? Faulty Transmission Fluid Pressure Sensor/Switch 'D' Transmission Fluid Pressure Sensor/Switch 'D' harness is open or shorted Transmission Fluid Pressure Sensor/Switch 'D' circuit poor electrical connection How do you troubleshoot P0878 ? Look at the plug wires to make sure they are not burnt or laying on the exhaust. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors. Searches related to P0878 Code - Transmission Fluid Pressure Sensor/Switch 'D' Circuit High P0878 P0879
