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
P1473
Diagnostic Module Tank Leakage Pump Current Plausibility
BMW
Auxiliary Emissions Control
High severity
P1475
Leakage Diagnostic Pump Reed Switch Did Not Close
BMW
Auxiliary Emissions Control
High severity
P1479
Brake Vacuum System Mechanical Malfunction
BMW
Vehicle Speed and Idle Control System
Low severity
P1484
Secondary Air Injection Pump Relay 2 Electrical Circuit Malfunction
BMW
Auxiliary Emissions Control
Medium severity
P1490
EVAP Canister Purge Regulator Valve 2 Short To Ground
BMW
Auxiliary Emissions Control
Low severity
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