P244A

Technical Definition:

Diesel Particulate Filter Differential Pressure Too Low

Trouble Code: P244A
Address: 0x244A
System: Powertrain
Subsystem:

Technical Description:

Possible Causes:

Possible Symptoms:

Diesel Particulate Filter Differential Pressure Too Low Bank 1

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P2449

Technical Definition:

Secondary Air Injection System High Air Flow (Bank 2)

Trouble Code: P2449
Address: 0x2449
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Secondary Air Injection System High Air Flow Bank 2

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P2448

Technical Definition:

Secondary Air Injection System High Air Flow (Bank 1)

Trouble Code: P2448
Address: 0x2448
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Secondary Air Injection System High Air Flow Bank 1

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P2447

Technical Definition:

Secondary Air Injection System Pump Stuck Off (Bank 2)

Trouble Code: P2447
Address: 0x2447
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Secondary Air Injection System Pump Stuck Off Bank 2

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P2446

Technical Definition:

Secondary Air Injection System Pump Stuck On (Bank 2)

Trouble Code: P2446
Address: 0x2446
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Secondary Air Injection System Pump Stuck On Bank 2

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P2445

Technical Definition:

Secondary Air Injection System Pump Stuck Off (Bank 1)

Trouble Code: P2445
Address: 0x2445
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Secondary Air Injection System Pump Stuck OFF

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Air pump fuse
– Vacuum hose
– Air pump assembly
– Faulty Pressure Sensor
– Air pump harness is open or shorted
– Air pump circuit poor electrical connection
– Pressure Sensor harness is open or shorted
– Pressure Sensor circuit poor electrical connection

Specific Makes:

P2444

Technical Definition:

Secondary Air Injection System Pump Stuck On (Bank 1)

Trouble Code: P2444
Address: 0x2444
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Secondary Air Injection System Pump Stuck ON

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Short in Air Pump circuit
– Air pump assembly
– Faulty Pressure Sensor
– Pressure Sensor harness is open or shorted
– Pressure Sensor circuit poor electrical connection

Specific Makes:

P2443

Technical Definition:

Secondary Air Injection System Switching Valve Stuck Closed (Bank 2)

Trouble Code: P2443
Address: 0x2443
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Secondary Air Injection System Switching Valve Stuck Closed Bank 2

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P2442

Technical Definition:

Secondary Air Injection System Switching Valve Stuck Open (Bank 2)

Trouble Code: P2442
Address: 0x2442
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Secondary Air Injection System Switching Valve Stuck Open Bank 2

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P2441

Technical Definition:

Secondary Air Injection System Switching Valve Stuck Closed (Bank 1)

Trouble Code: P2441
Address: 0x2441
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Secondary Air Injection System Switching Valve Stuck Closed

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Vacuum Switching Valve (VSV)
– Vacuum Switching Valve (VSV) harness is open or shorted
– Vacuum Switching Valve (VSV) circuit poor electrical connection
– Faulty Pressure Sensor
– Faulty Air Switching Valve

Specific Makes:

P2440

Technical Definition:

Secondary Air Injection System Switching Valve Stuck Open (Bank 1)

Trouble Code: P2440
Address: 0x2440
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Secondary Air Injection System Switching Valve Stuck Open

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P243F

Technical Definition:

Diesel Particulate Filter Restriction – Soot Accumulation Too High (Bank 2)

Trouble Code: P243F
Address: 0x243F
System: Powertrain
Subsystem:

Technical Description:

Possible Causes:

Possible Symptoms:

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P243E

Technical Definition:

Diesel Particulate Filter Regeneration Incomplete (Bank 2)

Trouble Code: P243E
Address: 0x243E
System: Powertrain
Subsystem:

Technical Description:

Possible Causes:

Possible Symptoms:

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P243D

Technical Definition:

Diesel Particulate Filter Regeneration Duration (Bank 2)

Trouble Code: P243D
Address: 0x243D
System: Powertrain
Subsystem:

Technical Description:

Possible Causes:

Possible Symptoms:

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P243C

Technical Definition:

Diesel Particulate Filter Regeneration Frequency (Bank 2)

Trouble Code: P243C
Address: 0x243C
System: Powertrain
Subsystem:

Technical Description:

Possible Causes:

Possible Symptoms:

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P243B

Technical Definition:

Diesel Particulate Filter Restriction – Forced Limited Power (Bank 2)

Trouble Code: P243B
Address: 0x243B
System: Powertrain
Subsystem:

Technical Description:

Possible Causes:

Possible Symptoms:

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P243A

Technical Definition:

Diesel Particulate Filter Restriction – Ash Accumulation (Bank 2)

Trouble Code: P243A
Address: 0x243A
System: Powertrain
Subsystem:

Technical Description:

Possible Causes:

Possible Symptoms:

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P2439

Technical Definition:

Secondary Air Injection System Air Flow / Pressure Sensor Circuit Intermittent / Erratic (Bank 2)

Trouble Code: P2439
Address: 0x2439
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Secondary Air Injection System Air Flow/Pressure Sensor Circuit Intermittent/Erratic Bank 2

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P2438

Technical Definition:

Secondary Air Injection System Air Flow / Pressure Sensor Circuit High (Bank 2)

Trouble Code: P2438
Address: 0x2438
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 2

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P2437

Technical Definition:

Secondary Air Injection System Air Flow / Pressure Sensor Circuit Low (Bank 2)

Trouble Code: P2437
Address: 0x2437
System: Powertrain
Subsystem: Auxiliary Emission Controls