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P0422 Diagnostic Trouble Code Discussion for October 2014

Catalyst Efficiency Below Normal (Bank 1)


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Trouble Ticket Help Requests for DTC P0422
Help Request Posted
2002 Mercedes-Benz ML320 3.2L MIL Lamp on VIN: 4JGAB54E02
P0422: main cat below efficiency bnk1. Gentlemen, Have my sons car he just purchased,had no MIL at time of purchase. Drove car home and drove for one day before getting registered and inspected. At time of inspection there was no MIL only thing that showed on report was EVAP not ready,all other mon...
October 22, 2014
2002 Mercedes-Benz ML320 3.2L MIL Lamp on VIN: 4JGAB54E02
P0422: main cat below efficiency bnk1. Gentlemen, Have my sons car he just purchased,had no MIL at time of purchase. Drove car home and drove for one day before getting registered and inspected. At time of inspection there was no MIL only thing that showed on report was EVAP not ready,all other mon...
October 23, 2014