Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
Replacing the Rear Heated Oxygen Sensor Bank 1 usually takes care of the problem.
To diagnose the P0139 Honda code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.
The Secondary Heated Oxygen Sensor (Secondary HO2S (Sensor 2)) detects the oxygen content in the exhaust gas downstream of the three-way catalytic converter (TWC) during stoichiometric air/fuel ratio feedback control. The Powertrain Control Module (PCM) controls the air/fuel ratio with the Air/Fuel Ratio (A/F) Sensor (Sensor 1) output voltage to optimize the TWC's efficiency. When the Secondary HO2S (Sensor 2) does not change during lean air/fuel ratio when the throttle is closed, after the full current is applied to the Secondary HO2S (Sensor 2) heater, and output remains within the specified range continuously, the PCM detects a malfunction and stores a Diagnostic Trouble Code (DTC).
Need more information on how to fix the P0139 Honda code? Get Access to Factory Service Manuals
Get the P0139 Honda code diagnosed by a professional: Find a repair shop in your area
Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P0139 Honda code? Have you replaced any parts?
Any information is appreciated. Thanks