Category: OBDii Powertrain Codes

P245F ISO / SAE reserved

P245F ISO / SAE reserved OBD Code: System: Subsystem:  P245F – (ASE)  Powertrain  Auxiliary Emission Controls Trouble Code Description: ISO / SAE reserved Location: Analysis: Possible Causes:       Tech description:

P245C Exhaust Gas Recirculation (EGR) Cooler Bypass Control Circuit Low

P245C Exhaust Gas Recirculation (EGR) Cooler Bypass Control Circuit Low OBD Code: System: Subsystem:  P245C – (ASE)  Powertrain  Auxiliary Emission Controls Trouble Code Description: Exhaust Gas Recirculation (EGR) Cooler Bypass Control Circuit Low Location: Analysis: Possible Causes:    End of Range – Circuit Lower Than Expected   Tech description:

P245D Exhaust Gas Recirculation (EGR) Cooler Bypass Control Circuit High

P245D Exhaust Gas Recirculation (EGR) Cooler Bypass Control Circuit High OBD Code: System: Subsystem:  P245D – (ASE)  Powertrain  Auxiliary Emission Controls Trouble Code Description: Exhaust Gas Recirculation (EGR) Cooler Bypass Control Circuit High Location: Analysis: Possible Causes:    End of Range – Circuit Higher Than Expected   Tech description:

P2455 Diesel Particulate Filter Differential Pressure Sensor Circuit High

P2455 Diesel Particulate Filter Differential Pressure Sensor Circuit High OBD Code: System: Subsystem:  P2455 – (ASE)  Powertrain  Auxiliary Emission Controls Trouble Code Description: Diesel Particulate Filter Differential Pressure Sensor Circuit High Location: Analysis: Possible Causes:    End of Range – Circuit Higher Than Expected   Tech description:

P2456 Diesel Particulate Filter Differential Pressure Sensor Circuit Intermittent / Erratic

P2456 Diesel Particulate Filter Differential Pressure Sensor Circuit Intermittent / Erratic OBD Code: System: Subsystem:  P2456 – (ASE)  Powertrain  Auxiliary Emission Controls Trouble Code Description: Diesel Particulate Filter Differential Pressure Sensor Circuit Intermittent / Erratic Location: Analysis: Possible Causes:    Periodically Unstable Circuit   Tech description:

P2459 Diesel Particulate Filter Regeneration Frequency

P2459 Diesel Particulate Filter Regeneration Frequency Possible causes – Exhaust leak – Improperly installed or loose Exhaust Gas Temperature (EGT) – Low engine compression – Corroed fuel injector – Water in the fuel system What about the obd code? The P2459 will set if the Engine Control Module (ECM) detects that the average time between…