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
P0489
Exhaust Gas Recirculation Throttle Control Circuit A Circuit Low
Generic
Auxiliary Emissions Control
Medium severity
P0490
Exhaust Gas Recirculation Throttle Control Circuit A Circuit High
Generic
Auxiliary Emissions Control
Medium severity
P0491
Secondary Air Injection System Insufficient Flow Bank 1
Generic
Auxiliary Emissions Control
High severity
P0499
Evaporative Emission System Vent Valve Control Circuit High
Generic
Auxiliary Emissions Control
Low severity
P0503
The signal sent by the vehicle speed sensor to ECM is too low
Generic
Vehicle Speed and Idle Control System
High severity
P0504
Brake Switch Circuit A / B Correlation
Generic
Vehicle Speed and Idle Control System
High severity
P0506
Idle Control System RPM Lower Than Expected
Generic
Vehicle Speed and Idle Control System
High severity
P0507
Idle Control System RPM Higher Than Expected
Generic
Vehicle Speed and Idle Control System
High severity
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