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

P1526 Air Bypass System
Auxiliary Emissions Control High severity
P1528 Subsidiary Throttle Valve Solenoid Circuit Malfunction
Fuel and Air Metering High severity
P1531 Invalid Test - Accelerator Pedal Movement
Fuel and Air Metering High severity
P1534 Inertia Switch Activated
Auxiliary Emissions Control High severity
P1535 Blower Fan Speed Circuit Range/Performance
Vehicle Speed and Idle Control System Low severity
P1539 Power To A/C Clutch Circuit Overcurrent
Vehicle Speed and Idle Control System Low severity
P1549 IMCC Circuit Malfunction, Bank B
Fuel and Air Metering High severity
P1600 Loss of KAM Power; Open Circuit
Computer Output Circuit High severity
P1607 MIL O/P Circuit Malfunction
Computer Output Circuit High severity
P1612 SBDS Interactive Codes
Computer Output Circuit High severity
P1626 Theft Deterrent Fuel Enable Signal Not Received/ B Supply To VCRM A/C Circuit Malfunction
Computer Output Circuit High severity
P1629 Internal Voltage Regulator Malfunction
Computer Output Circuit High severity
P1633 KAM Voltage Too Low
Computer Output Circuit High severity
P1635 Tire / Axle Ratio Out of Acceptable Range
Computer Output Circuit High severity
P1637 Can Link ECM/ABSCM Circuit / Network Malfunction
Computer Output Circuit High severity

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