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  1. JAGUAR P1421

P1421 / VW

Secondary Air Injection Valve Circuit Short To Ground

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P1421 / SUBARU

Exhaust Gas Recirculation Circuit High Input

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P1421 / FIAT

Catalytic converter 1 temperature

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P1421 / CHEVROLET

Intake Air Low Pressure Switch Circuit High Voltage

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P1421 / CADILLAC

Intake Air Low Pressure Switch Circuit High Voltage

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P1421 / BUICK

Intake Air Low Pressure Switch Circuit High Voltage

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P1421 / BMW

Secondary Air System Bank 1

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P1421 / AUDI

Sec.Air Inj.Valve Circ Short to Ground

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NOTE: Results from this database are the beginning of the diagnostic process, further investigation should be performed to confirm results before you begin repairs.