Audi A6 Error Code P0421

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Vehicle type: luxury sedan History/description: the Audi A6 is a worthy candidate for consideration of. With any gasoline engine option, a computer system scan for stored trouble codes is highly advised. Stored misfire codes can actually.

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My s4 keeps turning on the servie engine light with a p0421 code. I have captured the live data for the O2 sensors and graphed them and found the

Repair Information for P0421 Audi code. Learn what does P0421 Audi Warm Up Catalyst Efficiency Below Threshold Bank 1 means?

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Possible Causes and Repair Information for P0421 Audi code. Learn what does P0421 Audi means? P0421 Audi Warm Up Catalyst Efficiency Below Threshold Bank 1

Apr 18, 2016. The P0421 code means that the powertrain control module is noticing that the catalyst system is not performing as it should during warm up conditions. This time period would be from when the vehicle is first started until about five to ten minutes later. The powertrain control module uses data received from.

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P0421 Warm Up Catalyst Efficiency Below. malfunctioning fuel sending unit can cause error P0421 to. The code is P0421. My car is a 2003 Audi A6.

Definition of error code P0421 – Warm Up Catalyst Efficiency Below Threshold ( Bank 1). Read emissions expert information and diagnostics for fault code P0421.

As the code description implies the P0421 code means that the vehicle's control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting). Replacing the oxygen (O2 ) sensors may sometimes fix the code, but in most cases the catalytic convert needs to be.

What is the best answer to fix the Code# P0421 for Audi 2000 A6. – I just bought to Audi 2000 A6 Quattro, It had the check engine light on. AutoZone and Mechnic Shop ran the diagnostic for error code are: 1. (Bank 1, sensor 2) and (Bank 2, sensor 2) are bad 2. catalyst efficiency low-bank 1 3. the oxygen sensor monitor the catalytic converters ability to store oxygen 4.

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P0421 Warm Up Catalyst Efficiency Below Threshold. Technical Description. Warm Up Catalyst Efficiency Below Threshold (Bank 1). What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. Although generic, the specific repair steps.

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