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
P1400
Differential Pressure Feedback Electronic Sensor Circuit Low Voltage
Ford
Auxiliary Emissions Control
Medium severity
P1401
Differential Pressure Feedback Electronic Sensor Circuit High Voltage
Ford
Auxiliary Emissions Control
Medium severity
P1414
Secondary Air Injection System Monitor Circuit High Voltage
Ford
Auxiliary Emissions Control
Medium severity
P1415
Air Pump Circuit Malfunction/AIR System Bank 1
Ford
Auxiliary Emissions Control
Medium severity
P1431
Misfire Monitor Disabled Unable to Learn Trigger Wheel Profile
Ford
Ignition System
High severity
P1435
A/C Refrigerant Temperature Circuit Range/Performance
Ford
Auxiliary Emissions Control
High severity
P1443
EVAP Control System Purge Control Solenoid or Purge Control Valve Fault
Ford
Auxiliary Emissions Control
Low severity
P1453
Exhaust Gas Temperature Sensor 1 Open/Short to B
Ford
Vehicle Speed and Idle Control System
Medium severity
P1456
Exhaust Gas Temperature Control Bank 1 Limit Attained
Ford
Vehicle Speed and Idle Control System
Medium severity
P1459
Exhaust Gas Temperature Sensor 2 Range/Performance
Ford
Vehicle Speed and Idle Control System
Medium severity
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