P2453 Buick Diesel Particulate Filter Differential Pressure Sensor Circuit Range / Performance OBD Code: System: Subsystem: P2453 Buick – (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: Buick Vehicle:Buick Regal – ?Buick Riviera –…
Category: Buick
P244C Buick Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 1
P244D Buick 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–…
P244D Buick Exhaust Temperature Too High For Particulate Filter Regeneration Bank 1
P244E Buick Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 2 Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick Enclave – Buick Encore – Buick…
P244E Buick Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 2
P244F Buick Exhaust Temperature Too High For Particulate Filter Regeneration Bank 2 Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick Enclave – Buick Encore – Buick…
P244F Buick Exhaust Temperature Too High For Particulate Filter Regeneration Bank 2
P2450 Buick Evaporative Emission (EVAP) System Switching Valve Performance / Stuck Open OBD Code: System: Subsystem: P2450 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Evaporative Emission (EVAP) System Switching Valve Performance / Stuck Open Location: Analysis: Possible Causes: Stuck Open Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse…
P2449 Buick Secondary Air Injection System High Air Flow (Bank 2)
P244A Buick Diesel Particulate Filter Differential Pressure Too Low Bank 1 P244A Buick Information for specific makes Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick Enclave…
P244A Buick Diesel Particulate Filter Differential Pressure Too Low Bank 1
P244B Buick Diesel Particulate Filter Differential Pressure Too High Bank 1 Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick Enclave – Buick Encore – Buick Rainier…
P244B Buick Diesel Particulate Filter Differential Pressure Too High Bank 1
P244C Buick 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–…
P2448 Buick Secondary Air Injection System High Air Flow (Bank 1)
P2449 Buick Secondary Air Injection System High Air Flow (Bank 2) OBD Code: System: Subsystem: P2449 Buick – (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: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David…
P2446 Buick Secondary Air Injection System Pump Stuck On (Bank 2)
P2447 Buick Secondary Air Injection System Pump Stuck Off (Bank 2) OBD Code: System: Subsystem: P2447 Buick – (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: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse –…
P2447 Buick Secondary Air Injection System Pump Stuck Off (Bank 2)
P2448 Buick Secondary Air Injection System High Air Flow (Bank 1) OBD Code: System: Subsystem: P2448 Buick – (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: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David…
P2442 Buick Secondary Air Injection System Switching Valve Stuck Open (Bank 2)
P2443 Buick Secondary Air Injection System Switching Valve Stuck Closed (Bank 2) OBD Code: System: Subsystem: P2443 Buick – (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: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick…
P2443 Buick Secondary Air Injection System Switching Valve Stuck Closed (Bank 2)
P2444 Buick 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…
P2444 Buick Secondary Air Injection System Pump Stuck ON Bank 1
P2445 Buick 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…
P2445 Buick Secondary Air Injection System Pump Stuck OFF
P2446 Buick Secondary Air Injection System Pump Stuck On (Bank 2) OBD Code: System: Subsystem: P2446 Buick – (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: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse –…
P2439 Buick Secondary Air Injection System Air Flow / Pressure Sensor Circuit Intermittent / Erratic (Bank 2)
P2440 Buick 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…
P2440 Buick Secondary Air Injection System Switching Valve Stuck Open
P2441 Buick 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)…
P2441 Buick Secondary Air Injection System Switching Valve Stuck Closed Bank 1
P2442 Buick Secondary Air Injection System Switching Valve Stuck Open (Bank 2) OBD Code: System: Subsystem: P2442 Buick – (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: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick…
P2435 Buick Secondary Air Injection System Air Flow / Pressure Sensor Circuit (Bank 2)
P2436 Buick Secondary Air Injection System Air Flow / Pressure Sensor Circuit Range / Performance (Bank 2) OBD Code: System: Subsystem: P2436 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Secondary Air Injection System Air Flow / Pressure Sensor Circuit Range / Performance (Bank 2) Location: Analysis: Possible Causes: Bank 2 Out of Expected…
P2436 Buick Secondary Air Injection System Air Flow / Pressure Sensor Circuit Range / Performance (Bank 2)
P2437 Buick Secondary Air Injection System Air Flow / Pressure Sensor Circuit Low (Bank 2) OBD Code: System: Subsystem: P2437 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Secondary Air Injection System Air Flow / Pressure Sensor Circuit Low (Bank 2) Location: Analysis: Possible Causes: Bank 2 End of Range – Circuit Lower Than…