Category: Chevrolet

P2453 Chevrolet Diesel Particulate Filter Differential Pressure Sensor Circuit Range / Performance

P2453 Chevrolet Diesel Particulate Filter Differential Pressure Sensor Circuit Range / Performance OBD Code: System: Subsystem:  P2453 Chevrolet – (ASE)  Powertrain  Auxiliary Emission Controls Trouble Code Description: Diesel Particulate Filter Differential Pressure Sensor Circuit Range / Performance Location: Analysis: Possible Causes:    Out of Expected Range   Tech description:

P244D Chevrolet Exhaust Temperature Too High For Particulate Filter Regeneration Bank 1

P244D Chevrolet Exhaust Temperature Too High For Particulate Filter Regeneration Bank 1 Possible causes – Check coolant level– Check fuel quality– Faulty Upstream Exhaust Temperature– Upstream Exhaust Temperature harness is open or shorted– Upstream Exhaust Temperature circuit poor electrical connection– Inspect tailpipes for abnormal sediment; for example black soot, white ash, oil, coolant, or fuel–…

P244C Chevrolet Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 1

P244C Chevrolet Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 1 Possible causes – Check coolant level– Check fuel quality– Faulty Upstream Exhaust Temperature– Upstream Exhaust Temperature harness is open or shorted– Upstream Exhaust Temperature circuit poor electrical connection– Inspect tailpipes for abnormal sediment; for example black soot, white ash, oil, coolant, or fuel–…

P2446 Chevrolet Secondary Air Injection System Pump Stuck On (Bank 2)

P2446 Chevrolet Secondary Air Injection System Pump Stuck On (Bank 2) OBD Code: System: Subsystem:  P2446 Chevrolet – (ASE)  Powertrain  Auxiliary Emission Controls Trouble Code Description: Secondary Air Injection System Pump Stuck On (Bank 2) Location: Analysis: Possible Causes:  Bank 2  Stuck On   Tech description:

P2447 Chevrolet Secondary Air Injection System Pump Stuck Off (Bank 2)

P2447 Chevrolet Secondary Air Injection System Pump Stuck Off (Bank 2) OBD Code: System: Subsystem:  P2447 Chevrolet – (ASE)  Powertrain  Auxiliary Emission Controls Trouble Code Description: Secondary Air Injection System Pump Stuck Off (Bank 2) Location: Analysis: Possible Causes:  Bank 2  Stuck Off   Tech description:

P2448 Chevrolet Secondary Air Injection System High Air Flow (Bank 1)

P2448 Chevrolet Secondary Air Injection System High Air Flow (Bank 1) OBD Code: System: Subsystem:  P2448 Chevrolet – (ASE)  Powertrain  Auxiliary Emission Controls Trouble Code Description: Secondary Air Injection System High Air Flow (Bank 1) Location: Analysis: Possible Causes:  Bank 1     Tech description:

P2449 Chevrolet Secondary Air Injection System High Air Flow (Bank 2)

P2449 Chevrolet Secondary Air Injection System High Air Flow (Bank 2) OBD Code: System: Subsystem:  P2449 Chevrolet – (ASE)  Powertrain  Auxiliary Emission Controls Trouble Code Description: Secondary Air Injection System High Air Flow (Bank 2) Location: Analysis: Possible Causes:  Bank 2     Tech description:

P2443 Chevrolet Secondary Air Injection System Switching Valve Stuck Closed (Bank 2)

P2443 Chevrolet Secondary Air Injection System Switching Valve Stuck Closed (Bank 2) OBD Code: System: Subsystem:  P2443 Chevrolet – (ASE)  Powertrain  Auxiliary Emission Controls Trouble Code Description: Secondary Air Injection System Switching Valve Stuck Closed (Bank 2) Location: Analysis: Possible Causes:  Bank 2  Stuck Closed   Tech description:

P2444 Chevrolet Secondary Air Injection System Pump Stuck ON Bank 1

P2444 Chevrolet Secondary Air Injection System Pump Stuck ON Bank 1 Possible causes – Short in Air Pump circuit– Air pump assembly– Faulty Pressure Sensor– Pressure Sensor harness is open or shorted– Pressure Sensor circuit poor electrical connection What about the obd code? If the pressure level from the sensor has not reached a certain…

P2445 Chevrolet Secondary Air Injection System Pump Stuck OFF

P2445 Chevrolet Secondary Air Injection System Pump Stuck OFF Possible causes – 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 What about the obd code? If…

P2440 Chevrolet Secondary Air Injection System Switching Valve Stuck Open

P2440 Chevrolet Secondary Air Injection System Switching Valve Stuck Open Possible causes – 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 What about the obd code? If the Engine Control Module (ECM) receives the…

P2441 Chevrolet Secondary Air Injection System Switching Valve Stuck Closed Bank 1

P2441 Chevrolet Secondary Air Injection System Switching Valve Stuck Closed Bank 1 Possible causes – 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 What about the obd code? If the Engine Control Module (ECM)…

P2442 Chevrolet Secondary Air Injection System Switching Valve Stuck Open (Bank 2)

P2442 Chevrolet Secondary Air Injection System Switching Valve Stuck Open (Bank 2) OBD Code: System: Subsystem:  P2442 Chevrolet – (ASE)  Powertrain  Auxiliary Emission Controls Trouble Code Description: Secondary Air Injection System Switching Valve Stuck Open (Bank 2) Location: Analysis: Possible Causes:  Bank 2  Stuck Open   Tech description:

P2439 Chevrolet Secondary Air Injection System Air Flow / Pressure Sensor Circuit Intermittent / Erratic (Bank 2)

P2439 Chevrolet Secondary Air Injection System Air Flow / Pressure Sensor Circuit Intermittent / Erratic (Bank 2) OBD Code: System: Subsystem:  P2439 Chevrolet – (ASE)  Powertrain  Auxiliary Emission Controls Trouble Code Description: Secondary Air Injection System Air Flow / Pressure Sensor Circuit Intermittent / Erratic (Bank 2) Location: Analysis: Possible Causes:  Bank 2  Periodically Unstable Circuit…