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
P1393
Wheel Speed Sensor 1 G-Sensor Circuit High Voltage
Chevrolet
Vehicle Speed and Idle Control System
High severity
P1394
Wheel Speed Sensor 1 G-Sensor Circuit Intermittent
Chevrolet
Vehicle Speed and Idle Control System
High severity
P1399
Wheel Speed Sensor 2 G-Sensor Circuit Intermittent
Chevrolet
Vehicle Speed and Idle Control System
High severity
P1404
Exhaust Gas Recirculation Closed Position Performance
Chevrolet
Auxiliary Emissions Control
Medium severity
P1413
Secondary Air Injection System Monitor Circuit Low Voltage
Chevrolet
Auxiliary Emissions Control
Medium severity
P1414
Secondary Air Injection System Monitor Circuit High Voltage
Chevrolet
Auxiliary Emissions Control
Medium severity
P1418
Secondary Air Injection System Relay A Control Circuit High
Chevrolet
Auxiliary Emissions Control
Medium severity
P1423
Intake Air High Pressure Switch Circuit High Voltage
Chevrolet
Auxiliary Emissions Control
Medium severity
P1437
A/C Evaporator Air Temperature Circuit High
Chevrolet
Auxiliary Emissions Control
High severity
P1441
EVAP System Flow During Non-Purge Condition
Chevrolet
Auxiliary Emissions Control
Low severity
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