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
P041A
Exhaust Gas Recirculation Temperature Sensor B Circuit
Generic
Auxiliary Emissions Control
Medium severity
P041B
Exhaust Gas Recirculation Temperature Sensor B Circuit Range/Performance
Generic
Auxiliary Emissions Control
Medium severity
P041D
Exhaust Gas Recirculation Temperature Sensor B Circuit High
Generic
Auxiliary Emissions Control
Medium severity
P041F
Secondary Air Injection System Switching Valve A Circuit Low
Generic
Auxiliary Emissions Control
Medium severity
P042A
Catalyst Temperature Sensor Circuit Bank 1 Sensor 2
Generic
Auxiliary Emissions Control
Medium severity
P042D
Catalyst Temperature Sensor Circuit High Bank 1 Sensor 2
Generic
Auxiliary Emissions Control
Medium severity
P043B
Catalyst Temperature Sensor Circuit Range/Performance Bank 2 Sensor 2
Generic
Auxiliary Emissions Control
Medium severity
P043D
Catalyst Temperature Sensor Circuit High Bank 2 Sensor 2
Generic
Auxiliary Emissions Control
Medium severity
P043F
Evaporative Emission System Leak Detection Reference Orifice High Flow
Generic
Auxiliary Emissions Control
Medium severity
P044C
Exhaust Gas Recirculation Temperature Sensor C Circuit Low
Generic
Auxiliary Emissions Control
Medium severity
P044D
Exhaust Gas Recirculation Temperature Sensor C Circuit High
Generic
Auxiliary Emissions Control
Medium severity
P044F
Secondary Air Injection System Switching Valve A Circuit High
Generic
Auxiliary Emissions Control
Medium severity
P045A
Exhaust Gas Recirculation B Control Circuit
Generic
Auxiliary Emissions Control
Medium severity
P045C
Exhaust Gas Recirculation B Control Circuit Low
Generic
Auxiliary Emissions Control
Medium severity
P045D
Exhaust Gas Recirculation B Control Circuit High
Generic
Auxiliary Emissions Control
Medium severity
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