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 Engine Control Module (ECM)

==== Possible Solutions ====

* Inspect Catalyst  for internal rattle
* Check Oxygen Sensor(s)
* Check Oxygen Sensor(s) Control
* Perform Oxygen Sensor(s) Aging Check
* Set Readiness
* Check for Leak in Exhaust 
* Check ECM for firmware updates

==== 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]]