View source for 16816/P0432

== 16816/P0432 - Main Catalyst: Bank 2: Efficiency Below Threshold ==

==== Possible Symptoms ====

* * Malfunction Indicator Light (MIL) ON

==== Possible Causes ====

* Failed ceramic monolith in Catalyst
* Oxygen Sensor(s) defective
* Leak in exhaust system
* Firmware issue with ECM

==== Possible Solutions ====

* Inspect cat for internal rattle, replace if needed.
* Perform Readiness Test for Catalyst.
* Confirm Pre and Post O2 Sensor are working to design.
* Confirm there are no exhaust leaks.
* Check ECM to see if there is a firmware update.

==== Special Notes ====

*For Audi engine codes ART or AKB, please see TSB 26-04-01
*For Audi engine code ATQ, please see TSB 26-08-07
*For Volkswagen engines, please see TSB 01-07-07
*As per TSB 01-07-54, do not replace the ECM for this DTC. Please see TSB for complete details. 

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[[Category:Fault Codes]]