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P0422 Diagnostic Trouble Code Discussion for January 2009

Catalyst Efficiency Below Normal (Bank 1)

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Trouble Ticket Help Requests for DTC P0422
Help Request Posted
1999 Volkswagen Beetle GLS 2.0L No Start, Cuts out, Stall VIN: 3VWCC21C6X
P0422: Main Catalyst bank 1 efficiency belo threshold. Hello everyone, I am trying to figure out why this new beetle likes to die at stops and after sitting for a few minutes intermittently. I have verified that the car has no vac leaks. I have cleaned and adapted the throttle body. I found a loose battery cable a...
January 12, 2009