P0421

The P0421 code indicates that the catalyst system efficiency is below the threshold for bank 1 in a Tesla Model S (2012-2020). This usually points to issues with the catalytic converter, oxygen sensors, or exhaust leaks.

The P0421 code on a 2012-2020 Tesla Model S indicates that the catalytic converter is operating below the threshold efficiency for the bank 1 exhaust system, which can be due to various factors affecting emissions and performance.

The P0421 code indicates that the engine control module (ECM) has detected an issue with the warm-up catalyst efficiency of the catalytic converter in a 2021-present Tesla Model S Plaid/Refresh.

The P0421 code in a Tesla Model S Plaid (2021-present) indicates that the engine control module (ECM) has detected an issue with the warm-up catalyst efficiency for Bank 1, which may affect emission control and vehicle performance.

The P0421 code indicates an issue with the warm-up catalyst efficiency for Bank 1 in a Tesla Model S Plaid (2021-present). This can affect the vehicle's emissions and overall performance.

The P0421 code indicates that the catalytic converter's efficiency for the warm-up period is below the required threshold on a 2021-present Tesla Model S Plaid/Refresh.

The P0421 code indicates that the catalytic converter's efficiency is below the threshold, which may lead to increased emissions and potential engine performance issues in a 2021-present Tesla Model S Plaid/Refresh.

The P0421 code indicates that the engine control module (ECM) has detected an issue with the Warm-Up Catalyst Efficiency for Bank 1 in a 2021-present Tesla Model S Plaid/Refresh.