BMW 5 Series

P0420

The Check Engine Light (CEL) illumination in a BMW 5 Series G30/G31 (2017-2024) indicates that the vehicle's onboard diagnostics system has detected an issue with the engine or emission control system.

30 SolutionsP-CodePowertrain

Error Code Type

Powertrain

Symptoms

10 common

•Check Engine Light illuminated on the dashboard
•Rough idle or stalling during operation
•Decreased engine performance or power loss
+7 more

Most Affected Generations

1 generation

G30

Severity Levels

1 level

medium

Quick Facts

210

Total Solutions

Affected Components

Common Symptoms

Generations

All Solutions

Showing 30 of 210 solutions for error code P0420 across all generations.

what does it mean when the check engine light comes on in my BMW 5 Series G30/G31 (2017-2024)?

Check Engine Light illuminated on the dashboardRough idle or stalling during operation+4

P0420•G30

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how do I fix P0420 code on BMW 5 Series G30/G31 (2017-2024)?

The P0420 code indicates that the catalytic converter's efficiency is below the threshold set by the manufacturer for a 2017-2024 BMW 5 Series G30/G31. This can lead to increased emissions and potential performance issues.

Check engine light illuminatedReduced engine performance+3

P0420•G30

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how to fix P0420 error code in my BMW 5 Series G30/G31 (2017-2024)?

The P0420 error code indicates an issue with the catalytic converter efficiency on a 2017-2024 BMW 5 Series G30/G31. This suggests that the catalytic converter is not functioning as intended, which can lead to increased emissions and poor vehicle performance.

Check engine light illuminatedDecreased fuel economy+4

P0420•G30

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how to fix P0420 code on my BMW 5 Series G30/G31 (2017-2024)

The vehicle is experiencing a P0420 trouble code, indicating issues with the catalytic converter's efficiency in a BMW 5 Series G30/G31 (2017-2024).

Check engine light illuminatedDecreased engine performance+4

P0420•G30

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how to fix BMW 5 Series G30/G31 (2017-2024) P0420 catalytic converter code

The vehicle is experiencing a P0420 trouble code, indicating that the catalytic converter's efficiency is below the threshold set by the manufacturer. This issue pertains to the BMW 5 Series G30/G31 models produced between 2017 and 2024.

Check engine light illuminatedReduced engine performance+4

P0420•G30

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how to fix P0420 code on BMW 5 Series G30/G31 (2017-2024)

The P0420 code indicates that the catalytic converter efficiency is below the required threshold on a BMW 5 Series G30/G31 (2017-2024). This often suggests a malfunctioning catalytic converter or issues related to the exhaust system.

Check engine light illuminatedDecreased fuel efficiency+3

P0420•G30

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why does my BMW 5 Series G30/G31 (2017-2024) have a light on the dashboard

The dashboard light on your BMW 5 Series G30/G31 (2017-2024) indicates a potential issue requiring further investigation.

Dashboard warning light illuminatedPossible reduction in engine power+4

P0420•G30

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how do I fix the P0420 code on my BMW 5 Series G30/G31 (2017-2024)

The vehicle is displaying a P0420 trouble code, indicating a malfunction in the catalytic converter system on a BMW 5 Series G30/G31 (2017-2024).

Check engine light illuminatedPoor acceleration or loss of power+3

P0420•G30

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how to fix the P0420 code in my BMW 5 Series G30/G31 (2017-2024)

The P0420 code indicates that the catalytic converter's efficiency is below the threshold, which may lead to increased emissions and poor engine performance in a 2017-2024 BMW 5 Series G30/G31.

Check engine light illuminatedReduced engine performance+4

P0420•G30

View →

how to fix the P0420 code in my BMW 5 Series G30/G31 (2017-2024)

The P0420 code indicates that the catalytic converter efficiency is below the threshold for Bank 1 in a 2017-2024 BMW 5 Series G30/G31.

Check engine light illuminatedDecreased fuel efficiency+3

P0420•G30

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how to fix P0420 code BMW 5 Series G30/G31 (2017-2024)

The vehicle is experiencing a P0420 trouble code indicating "Catalyst System Efficiency Below Threshold (Bank 1)" on a BMW 5 Series G30/G31 (2017-2024).

Check engine light illuminatedDecreased fuel efficiency+4

P0420•G30

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how to address BMW 5 Series G30/G31 (2017-2024) P0420 code issues?

The BMW 5 Series G30/G31 (2017-2024) is experiencing a P0420 trouble code, indicating a potential issue with the catalytic converter's efficiency, specifically in bank 1.

Check engine light illuminatedPoor acceleration or lack of power+3

P0420•G30

View →

how to fix P0420 code in my BMW 5 Series G30/G31 (2017-2024)?

The P0420 code indicates that the catalytic converter's efficiency is below the threshold specified by the manufacturer in your BMW 5 Series G30/G31 (2017-2024).

Check engine light illuminatedDecreased fuel efficiency+4

P0420•G30

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what does it mean if the check engine light comes on in my BMW 5 Series G30/G31 (2017-2024)?

The check engine light has illuminated in a BMW 5 Series G30/G31 (2017-2024), indicating that the vehicle's onboard diagnostics system has detected an issue that requires further investigation.

Check engine light illuminated on the dashboardEngine running rough or misfiring+4

P0420•G30

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how to fix P0420 code on my BMW 5 Series G30/G31 (2017-2024)

The P0420 code indicates that the catalytic converter efficiency is below the threshold for Bank 1 on your BMW 5 Series G30/G31 (2017-2024).

Check engine light illuminatedDecreased fuel efficiency+3

P0420•G30

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my BMW 5 Series G30/G31 (2017-2024) has a P0420 code, what does it indicate?

The presence of a P0420 code in a BMW 5 Series G30/G31 (2017-2024) indicates an issue with the catalytic converter's efficiency, specifically that the catalytic converter is not functioning as intended.

Check engine light illuminatedDecreased engine performance+4

P0420•G30

View →

how to fix P0420 code on BMW 5 Series G30/G31 (2017-2024)

The P0420 code indicates that the catalytic converter's efficiency is below the threshold on a BMW 5 Series G30/G31 (2017-2024). This often suggests issues with the catalytic converter itself or related components.

Check engine light illuminatedDecreased fuel efficiency+4

P0420•G30

View →

how to diagnose a P0420 code in my BMW 5 Series G30/G31 (2017-2024)

The vehicle is displaying a P0420 trouble code, indicating a problem with the catalytic converter efficiency in a BMW 5 Series G30/G31 (2017-2024).

Check engine light illuminatedDecreased fuel efficiency+3

P0420•G30

View →

how to fix P0420 code in BMW 5 Series G30/G31 (2017-2024)

The P0420 code indicates that the catalytic converter's efficiency is below the threshold set by the manufacturer in a 2017-2024 BMW 5 Series G30/G31.

Check engine light illuminatedReduced engine performance+4

P0420•G30

View →

how to fix P0420 error code in BMW 5 Series G30/G31 (2017-2024)?

The P0420 error code indicates that the catalytic converter system efficiency is below the threshold for the BMW 5 Series G30/G31 (2017-2024), potentially leading to reduced engine performance and increased emissions.

Check engine light illuminatedDecreased fuel efficiency+3

P0420•G30

View →

how to fix P0420 code on BMW 5 Series G30/G31 (2017-2024)

The P0420 code indicates that the catalytic converter's efficiency is below the threshold set by the vehicle's manufacturer for a 2017-2024 BMW 5 Series G30/G31.

Check engine light illuminatedDecreased fuel efficiency+3

P0420•G30

View →

my BMW 5 Series G30/G31 (2017-2024) check engine light is on and won't turn off

The check engine light on a 2017-2024 BMW 5 Series G30/G31 is illuminated and remains on, indicating a potential issue with the vehicle's engine or emissions system.

Check engine light illuminatedDecreased engine performance+4

P0420•G30

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how to fix P0420 code in BMW 5 Series G30/G31 (2017-2024)

The P0420 code indicates that the catalytic converter efficiency is below the threshold, which can lead to increased emissions and potential performance issues in the 2017-2024 BMW 5 Series G30/G31.

Check engine light illuminatedDecreased fuel efficiency+3

P0420•G30

View →

how do I fix the P0420 code in my BMW 5 Series G30/G31 (2017-2024)

The vehicle is displaying a P0420 trouble code, indicating that the catalytic converter efficiency is below the required threshold. This issue is relevant to the BMW 5 Series G30/G31 model from the years 2017 to 2024.

Check engine light illuminatedDecreased fuel efficiency+4

P0420•G30

View →

how to fix P0420 error code on my BMW 5 Series G30/G31 (2017-2024)

The P0420 error code indicates that the catalytic converter efficiency is below the threshold for the BMW 5 Series G30/G31 (2017-2024). This issue can lead to reduced engine performance and increased emissions.

Check engine light illuminatedDecreased fuel efficiency+3

P0420•G30

View →

how to fix the P0420 code on my BMW 5 Series G30/G31 (2017-2024)

The P0420 code indicates a fault with the catalytic converter efficiency on a BMW 5 Series G30/G31 (2017-2024). This code suggests that the catalytic converter is not performing as expected, potentially leading to increased emissions and poor engine performance.

Check engine light illuminatedDecreased fuel efficiency+3

P0420•G30

View →

how to troubleshoot my BMW 5 Series G30/G31 (2017-2024) check engine light P0420?

The check engine light is illuminated on a BMW 5 Series G30/G31 (2017-2024) with a diagnostic trouble code (DTC) P0420, which indicates an issue with the catalytic converter efficiency.

Check engine light illuminatedDecreased engine performance+3

P0420•G30

View →

how to fix P0420 code in my BMW 5 Series G30/G31 (2017-2024)

The P0420 code indicates that the catalytic converter's efficiency is below the threshold set by the vehicle's engine control unit (ECU) in your BMW 5 Series G30/G31 (2017-2024).

Check engine light illuminatedDecreased fuel economy+3

P0420•G30

View →

how to fix P0420 code on my BMW 5 Series G30/G31 (2017-2024)

The P0420 code indicates that the catalytic converter efficiency is below the threshold. This issue is occurring in a BMW 5 Series G30/G31 model from 2017 to 2024.

Check engine light illuminatedPoor fuel economy+4

P0420•G30

View →

how to fix P0420 code in my BMW 5 Series G30/G31 (2017-2024)

The P0420 code indicates that the catalytic converter's efficiency is below the required threshold in a BMW 5 Series G30/G31 (2017-2024). This can lead to increased emissions and potential performance issues.

Check engine light illuminatedDecreased fuel efficiency+3

P0420•G30

View →

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