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.
As the code description implies the P0420 code means that the vehicle's Engine Control Module (ECM) has detected that the Three-way Catalyst Converter is not working properly (it is not as efficient as the factory is expecting). Replacing the oxygen (O2) sensors may sometimes fix the code, but in most cases, the Three-way Catalyst Converter needs to be replaced to fix the problem. If the P0420 code is combined with other codes, try fixing the other codes first.
To diagnose the P0420 2017 Toyota RAV4 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.
Need more information on how to fix the P0420 2017 Toyota RAV4 code? Get Access to Factory Service Manuals
Get the P0420 2017 Toyota RAV4 code diagnosed by a professional: Find a repair shop in your area
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