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
P244D
Exhaust Temperature Too High For Particulate Filter Regeneration Bank 1
Auxiliary Emissions Control
Medium severity
P244F
Exhaust Temperature Too High For Particulate Filter Regeneration Bank 2
Auxiliary Emissions Control
Medium severity
P2450
Evaporative Emission System Switching Valve Performance/Stuck Open
Auxiliary Emissions Control
Low severity
P2452
Diesel Particulate Filter Pressure Sensor A Circuit
Auxiliary Emissions Control
Medium severity
P2453
Diesel Particulate Filter Pressure Sensor A Circuit Range/Performance
Auxiliary Emissions Control
Medium severity
P2454
Diesel Particulate Filter Pressure Sensor A Circuit Low
Auxiliary Emissions Control
Medium severity
P2457
Exhaust Gas Recirculation Cooling System Performance
Auxiliary Emissions Control
Medium severity
P245A
Exhaust Gas Recirculation Cooler Bypass Control Circuit/Open
Auxiliary Emissions Control
High severity
P2479
Exhaust Gas Temperature Out of Range Bank 1 Sensor 2
Auxiliary Emissions Control
Medium severity
P247B
Exhaust Gas Temperature Out of Range Bank 1 Sensor 4
Auxiliary Emissions Control
Medium severity
P247C
Exhaust Gas Temperature Out of Range Bank 2 Sensor 1
Auxiliary Emissions Control
Medium severity
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