Audi Code P0421

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P0726 Code: Engine Speed Input Circuit Range / Performance - In The

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P0421 code meaning, symptoms, causes & fixing

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P0322 – crankshaft position (ckp) sensor/engine speed (rpm) sensor noAudi a4 packs coil cel symptoms 0l issues 2003 engine time Check engine light on with code p0421, how do i fix it?Q7 3.0 tdi p0087 low fuel pressure.