Audi
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Audi Code car problem P1422
Secondary air injection (AIR) valve/solenoid – short to positive
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Audi Code car problem P1421
Secondary air injection (AIR) valve/solenoid – short to ground
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Audi Code car problem P1420
Secondary air injection (AIR) valve/solenoid – circuit malfunction
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Audi Code car problem P1416
Exhaust gas recirculation (EGR) valve position sensor – upper limit exceeded
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Audi Code car problem P1415
Exhaust gas recirculation (EGR) valve position sensor – lower limit exceeded
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Audi Code car problem P1414
Secondary air injection (AIR) system, Bank 2 – leak detected
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