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P0422 Diagnostic Trouble Code Discussion for September 2005

Catalyst Efficiency Below Normal (Bank 1)

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Trouble Ticket Help Requests for DTC P0422
Help Request Posted
1999 Volkswagen Jetta GLS 2.0L Hesitation, Misfire, MIL Lamp on VIN: 3VWSA29M7X
P0422: main catalyst bank 1 too lean. Came in for poor running complaint vehicle barly ran had no power and would not respond to throtle increase till vehile was warm.Replaced parts listed above. Problem was fixed vehicle ran fine for aproximatly one month vehicle is now back with similar complain...
September 16, 2005