OBD fault code library
Look up any P or U code to see what it means, what causes it, the parts involved and how it gets fixed.
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Fault codes
P1402
EGR Vacuum Regulator Solenoid Valve Short To Positive
Audi
Auxiliary Emissions Control
Medium severity
P1406
EGR Temperature Sensor Signal Range Performance
Audi
Auxiliary Emissions Control
Medium severity
P1411
Bank 2 Secondary Air Injection System Output Too Small
Audi
Auxiliary Emissions Control
Medium severity
P1412
EGR Differential Pressure Sensor Signal Too Low
Audi
Auxiliary Emissions Control
Medium severity
P1414
Bank 2 Secondary Air Injection System Leak Detect
Audi
Auxiliary Emissions Control
Medium severity
P1420
Secondary Air Injection Control Module Electrical Malfunction
Audi
Auxiliary Emissions Control
Medium severity
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