Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
The cost to diagnose the P1084 LEXUS code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
The Engine Control Module (ECM) monitors the Exhaust Gas Temperature Sensor. The ECM sets the Diagnostic Trouble Code (DTC) when the Exhaust Gas Temperature Sensor is not to factory specifications. HCAC (Hydro-Carbon Absorber and Catalyst System) fault detected.
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