P0875 Dodge RAM 1500 - Ud Hydraulic Pressure Test | Step-by-Step Diagnosis

P0875 (Ud Hydraulic Pressure Test) on a Dodge RAM 1500? This video walks through the complete 17-step factory diagnostic procedure with the wiring diagram and connector views - no guesswork, no parts cannon. When monitored: In any forward gear with engine speed above 1000 RPM shortly after a shift and every minute thereafter. Set condition: After a shift into a forward gear, with engine speed above 1000 RPM, the PCM momentarily turns on element pressure to the Clutch circuits that don't have pressure to identify the correct Pressure Switch closes. If the Pressure Switch does not close 2 times, the DTC sets. In this video: 1. Check If Related Dtcs Are Present 2. Check If The DTC P0765 Is Present 3. Check If Other Dtcs Are Present 4. Check To See If DTC P0875 Is Current 5. Check If The Line Pressure Stays The Same 6. Check The Line Pressure Sensor Connection 7. Check The Line Pressure Sensor Operation 8. Check The (F856) 5-VOLT Supply Circuit For An Open 9. Check The (F856) 5-VOLT Supply Circuit For A Short To Ground 10. Compare The Scan Tool Reading To Pressure Gauge Reading 11. Check The Wiring And Connectors 12. Check For Excessive Debris 13. Check The Ud Hydraulic Clutch Circuit 14. Check The (T29) Ud Pressure Switch Sense Circuit For An Open 15. Check The (T29) Ud Pressure Switch Sense Circuit For A Short To Ground 16. Check The (T29) Ud Pressure Switch Sense Circuit For A Short To Another Circuit 17. Intermittent Wiring And Connectors Possible causes covered: Line Pressure Sensor; Transmission Fluid Contamination; Related Dtc's Present; Transmission Solenoid/Trs Assembly; Excessive Debris In Oil Pan; Poor Line Pressure Sensor Connection; (T29) Ud Pressure Switch Sense Circuit Open; Transmission Control Relay Dtcs Present. Applies to the Dodge RAM 1500 third generation (2002-2008) with the 3.7L V6, 4.7L V8 and 5.7L HEMI V8. Similar logic applies to RAM 2500/3500 gas models of the same generation. This is general information for educational purposes - always confirm against the service information for your exact vehicle.