P2438 Buick Secondary Air Injection System Air Flow / Pressure Sensor Circuit High (Bank 2) OBD Code: System: Subsystem: P2438 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Secondary Air Injection System Air Flow / Pressure Sensor Circuit High (Bank 2) Location: Analysis: Possible Causes: Bank 2 End of Range – Circuit Higher Than…
Category: Buick
P2438 Buick Secondary Air Injection System Air Flow / Pressure Sensor Circuit High (Bank 2)
P2439 Buick Secondary Air Injection System Air Flow / Pressure Sensor Circuit Intermittent / Erratic (Bank 2) OBD Code: System: Subsystem: P2439 Buick – (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…
P2432 Buick Secondary Air Injection System Pressure Sensor Circuit Low Voltage
P2433 Buick Secondary Air Injection System Pressure Sensor Circuit High Voltage Possible causes – Faulty AIR Pressure Sensor– AIR Pressure Sensor harness is open or shorted– AIR Pressure Sensor circuit poor electrical connection What about the obd code? The PCM has detected a high voltage condition on the AIR Pressure Sensor signal circuit Symptoms –…
P2433 Buick Secondary Air Injection System Pressure Sensor Circuit High Voltage
P2434 Buick Secondary Air Injection System Air Flow / Pressure Sensor Circuit Intermittent / Erratic (Bank 1) OBD Code: System: Subsystem: P2434 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Secondary Air Injection System Air Flow / Pressure Sensor Circuit Intermittent / Erratic (Bank 1) Location: Analysis: Possible Causes: Bank 1 Periodically Unstable Circuit…
P2434 Buick Secondary Air Injection System Air Flow / Pressure Sensor Circuit Intermittent / Erratic (Bank 1)
P2435 Buick Secondary Air Injection System Air Flow / Pressure Sensor Circuit (Bank 2) OBD Code: System: Subsystem: P2435 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Secondary Air Injection System Air Flow / Pressure Sensor Circuit (Bank 2) Location: Analysis: Possible Causes: Bank 2 Circuit Issue Tech description: Buick Vehicle:Buick Regal –…
P242F Buick Diesel Particulate Filter Restriction Ash Accumulation
P2430 Buick Secondary Air Injection System Pressure Sensor Stuck In Range-Signal Performance Fault Possible causes – Faulty AIR Pressure Sensor– AIR Pressure Sensor harness is open or shorted– AIR Pressure Sensor circuit poor electrical connection What about the obd code? The AIR Pressure Sensor is reporting a pressure greater than or less than expected during…
P2430 Buick Secondary Air Injection System Pressure Sensor Stuck In Range-Signal Performance Fault
P2431 Buick Secondary Air Injection System Pressure Sensor Signal Performance Fault Possible causes – Faulty AIR Pressure Sensor– AIR Pressure Sensor harness is open or shorted– AIR Pressure Sensor circuit poor electrical connection What about the obd code? The AIR Pressure Sensor is reporting a pressure greater than or less than expected during the system…
P2431 Buick Secondary Air Injection System Pressure Sensor Signal Performance Fault
P2432 Buick Secondary Air Injection System Pressure Sensor Circuit Low Voltage Possible causes – Faulty AIR Pressure Sensor– AIR Pressure Sensor harness is open or shorted– AIR Pressure Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P2432 Buick Description The Secondary Air Injection (AIR) System aids in…
P242B Buick Exhaust Gas Temperature Sensor Circuit Range / Performance (Bank 1 – Sensor 3)
P242C Buick Exhaust Gas Temperature Sensor Circuit Low (Bank 1 – Sensor 3) OBD Code: System: Subsystem: P242C Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Exhaust Gas Temperature Sensor Circuit Low (Bank 1 – Sensor 3) Location: Analysis: Possible Causes: Bank 1 – Sensor 3 End of Range – Circuit Lower Than Expected…
P242C Buick Exhaust Gas Temperature Sensor Circuit Low (Bank 1 – Sensor 3)
P242D Buick Exhaust Gas Temperature Sensor Circuit High (Bank 1 – Sensor 3) OBD Code: System: Subsystem: P242D Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Exhaust Gas Temperature Sensor Circuit High (Bank 1 – Sensor 3) Location: Analysis: Possible Causes: Bank 1 – Sensor 3 End of Range – Circuit Higher Than Expected…
P242D Buick Exhaust Gas Temperature Sensor Circuit High (Bank 1 – Sensor 3)
P242E Buick Exhaust Gas Temperature Sensor Circuit Intermittent / Erratic (Bank 1 – Sensor 3) OBD Code: System: Subsystem: P242E Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Exhaust Gas Temperature Sensor Circuit Intermittent / Erratic (Bank 1 – Sensor 3) Location: Analysis: Possible Causes: Bank 1 – Sensor 3 Periodically Unstable Circuit …
P242E Buick Exhaust Gas Temperature Sensor Circuit Intermittent / Erratic (Bank 1 – Sensor 3)
P242F Buick Diesel Particulate Filter Restriction Ash Accumulation OBD Code: System: Subsystem: P242F Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Diesel Particulate Filter Restriction Ash Accumulation Location: Analysis: Possible Causes: Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick…
P242A Buick Exhaust Gas Temperature Sensor Circuit (Bank 1 – Sensor 3)
P242B Buick Exhaust Gas Temperature Sensor Circuit Range / Performance (Bank 1 – Sensor 3) OBD Code: System: Subsystem: P242B Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Exhaust Gas Temperature Sensor Circuit Range / Performance (Bank 1 – Sensor 3) Location: Analysis: Possible Causes: Bank 1 – Sensor 3 Out of Expected Range…
P2428 Buick Exhaust Gas Temperature Too High (Bank 1)
P2429 Buick Exhaust Gas Temperature Too High (Bank 2) OBD Code: System: Subsystem: P2429 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Exhaust Gas Temperature Too High (Bank 2) Location: Analysis: Possible Causes: Bank 2 Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick…
P2429 Buick Exhaust Gas Temperature Too High (Bank 2)
P242A Buick Exhaust Gas Temperature Sensor Circuit (Bank 1 – Sensor 3) OBD Code: System: Subsystem: P242A Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Exhaust Gas Temperature Sensor Circuit (Bank 1 – Sensor 3) Location: Analysis: Possible Causes: Bank 1 – Sensor 3 Circuit Issue Tech description: Buick Vehicle:Buick Regal – ?Buick…
P2424 Buick HC Adsorption Catalyst Efficiency Below Threshold (Bank 2)
P2425 Buick Exhaust Gas Recirculation (EGR) Cooling Valve Control Circuit / Open OBD Code: System: Subsystem: P2425 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Exhaust Gas Recirculation (EGR) Cooling Valve Control Circuit / Open Location: Analysis: Possible Causes: Open Circuit Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse…
P2425 Buick Exhaust Gas Recirculation (EGR) Cooling Valve Control Circuit / Open
P2426 Buick Exhaust Gas Recirculation (EGR) Cooling Valve Control Circuit Low OBD Code: System: Subsystem: P2426 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Exhaust Gas Recirculation (EGR) Cooling Valve Control Circuit Low Location: Analysis: Possible Causes: End of Range – Circuit Lower Than Expected Tech description: Buick Vehicle:Buick Regal – ?Buick…
P2426 Buick Exhaust Gas Recirculation (EGR) Cooling Valve Control Circuit Low
P2427 Buick Exhaust Gas Recirculation (EGR) Cooling Valve Control Circuit High OBD Code: System: Subsystem: P2427 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Exhaust Gas Recirculation (EGR) Cooling Valve Control Circuit High Location: Analysis: Possible Causes: End of Range – Circuit Higher Than Expected Tech description: Buick Vehicle:Buick Regal – ?Buick…
P2427 Buick Exhaust Gas Recirculation (EGR) Cooling Valve Control Circuit High
P2428 Buick Exhaust Gas Temperature Too High (Bank 1) OBD Code: System: Subsystem: P2428 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Exhaust Gas Temperature Too High (Bank 1) Location: Analysis: Possible Causes: Bank 1 Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick…
P2421 Buick Evaporative Emission (EVAP) System Vent Valve Stuck Open
P2422 Buick Evaporative Emission (EVAP) System Vent Valve Stuck Closed OBD Code: System: Subsystem: P2422 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Evaporative Emission (EVAP) System Vent Valve Stuck Closed Location: Analysis: Possible Causes: Stuck Closed Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick…