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P0422 Diagnostic Trouble Code Discussion for August 2005

Catalyst Efficiency Below Normal (Bank 1)

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Trouble Ticket Help Requests for DTC P0422
Help Request Posted
2000 Volvo V70 X/C AWD 2.4L No Start, Stall, MIL Lamp on, Hard start VIN: YV1LZ56D5Y
P0422: Catalyst. This car intermittantly has extended crank time or starts and stalls. Fuel pressure is very high and drops to 0 at rest. I plan to replace the fuel pressure regulator but wonder if the pump might have a faulty anti drain back valve. If it does have one, is it ...
August 05, 2005