2.8 fault codes P0411, P0422...
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2.8 fault codes P0411, P0422...
I need some input from you Audi techs...
The 0411 code points to the secondary air injection (egr valve) and the 0422 code points to a bad catalyst, bank 1. My question is, can a bad egr valve, or vac hose going to it, cause the 0422 code? Is the EGR normally suspect, or is more typically a vac hose?
Previously, I had replaced the valve cover gaskets, plugs and wires, and coil packs... so I have eliminated a bad spark discharge as a suspect hopefully.
Any input would be most appreciated!
98 A4 2.8 fwd
The 0411 code points to the secondary air injection (egr valve) and the 0422 code points to a bad catalyst, bank 1. My question is, can a bad egr valve, or vac hose going to it, cause the 0422 code? Is the EGR normally suspect, or is more typically a vac hose?
Previously, I had replaced the valve cover gaskets, plugs and wires, and coil packs... so I have eliminated a bad spark discharge as a suspect hopefully.
Any input would be most appreciated!
98 A4 2.8 fwd
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