Lexus NX: Axle And Differential

 Catalyst System Efficiency Below Threshold (Bank 1) (P0420)

MONITOR DESCRIPTION The ECM uses sensors mounted in front of and behind the Three-Way Catalytic Converter (TWC) to monitor its efficiency. The first sensor, the air fuel ratio sensor, sends pre-catalyst information to the ECM. The second sensor, the heated oxygen sensor, sends post-catalyst informat

 Diagnosis System

DIAGNOSIS SYSTEM DESCRIPTION The ECU stores DTCs when malfunctions occur. The diagnostic system allows for reading of the DTCs from the DLC3. Use the Techstream to check for malfunctions and perform repairs. CHECK DLC3 (a) Check the DLC3. Click here INSPECT AUXILIARY BATTERY VOLTAGE (a) Measure t