P2423 Buick HC Adsorption Catalyst Efficiency Below Threshold (Bank 1) OBD Code: System: Subsystem: P2423 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: HC Adsorption Catalyst Efficiency Below Threshold (Bank 1) Location: Analysis: Possible Causes: Bank 1 Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick…
Category: Buick
P2423 Buick HC Adsorption Catalyst Efficiency Below Threshold (Bank 1)
P2424 Buick HC Adsorption Catalyst Efficiency Below Threshold (Bank 2) OBD Code: System: Subsystem: P2424 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: HC Adsorption Catalyst Efficiency Below Threshold (Bank 2) Location: Analysis: Possible Causes: Bank 2 Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick…
P2418 Buick EVAP System Valve Control Circuit Open
P2419 Buick Evaporative Emission (EVAP) System Switching Valve Control Circuit Low OBD Code: System: Subsystem: P2419 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Evaporative Emission (EVAP) System Switching Valve Control Circuit Low Location: Analysis: Possible Causes: End of Range – Circuit Lower Than Expected Tech description: Buick Vehicle:Buick Regal – ?Buick…
P2419 Buick Evaporative Emission (EVAP) System Switching Valve Control Circuit Low
P2420 Buick Evaporative Emission (EVAP) System Switching Valve Control Circuit High OBD Code: System: Subsystem: P2420 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Evaporative Emission (EVAP) System Switching Valve Control Circuit High Location: Analysis: Possible Causes: End of Range – Circuit Higher Than Expected Tech description: Buick Vehicle:Buick Regal – ?Buick…
P2420 Buick Evaporative Emission (EVAP) System Switching Valve Control Circuit High
P2421 Buick Evaporative Emission (EVAP) System Vent Valve Stuck Open OBD Code: System: Subsystem: P2421 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Evaporative Emission (EVAP) System Vent Valve Stuck Open Location: Analysis: Possible Causes: Stuck Open Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick…
P2414 Buick Oxygen (O2) Sensor Exhaust Sample Error (Bank 1 – Sensor 1)
P2415 Buick Oxygen (O2) Sensor Exhaust Sample Error (Bank 2 – Sensor 1) OBD Code: System: Subsystem: P2415 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Oxygen (O2) Sensor Exhaust Sample Error (Bank 2 – Sensor 1) Location: Analysis: Possible Causes: Oxygen Sensor – Bank 2 – Sensor 1 Tech description: Buick…
P2415 Buick Oxygen (O2) Sensor Exhaust Sample Error (Bank 2 – Sensor 1)
P2416 Buick Oxygen (O2) Sensor Signals Swapped (Bank 1 – Sensor 2) / (Bank 1 – Sensor 3 OBD Code: System: Subsystem: P2416 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Oxygen (O2) Sensor Signals Swapped (Bank 1 – Sensor 2) / (Bank 1 – Sensor 3 Location: Analysis: Possible Causes: Oxygen Sensor –…
P2416 Buick Oxygen (O2) Sensor Signals Swapped (Bank 1 – Sensor 2) / (Bank 1 – Sensor 3
P2417 Buick Oxygen (O2) Sensor Signals Swapped (Bank 2 – Sensor 2) / (Bank 2 – Sensor 3) OBD Code: System: Subsystem: P2417 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Oxygen (O2) Sensor Signals Swapped (Bank 2 – Sensor 2) / (Bank 2 – Sensor 3) Location: Analysis: Possible Causes: Oxygen Sensor –…
P2417 Buick Oxygen (O2) Sensor Signals Swapped (Bank 2 – Sensor 2) / (Bank 2 – Sensor 3)
P2418 Buick EVAP System Valve Control Circuit Open Possible causes – Canister Purge Valve harness is open or shorted– Canister Purge Valve circuit poor electrical connection– Faulty Canister Purge Valve Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick –…
P2411 Buick Fuel Cap Sensor / Switch Circuit High
P2412 Buick Fuel Cap Sensor / Switch Circuit Intermittent / Erratic OBD Code: System: Subsystem: P2412 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Fuel Cap Sensor / Switch Circuit Intermittent / Erratic Location: Analysis: Possible Causes: Periodically Unstable Circuit Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse –…
P2412 Buick Fuel Cap Sensor / Switch Circuit Intermittent / Erratic
P2413 Buick Exhaust Gas Recirculation (EGR) System Performance OBD Code: System: Subsystem: P2413 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Exhaust Gas Recirculation (EGR) System Performance Location: Analysis: Possible Causes: Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick…
P2413 Buick Exhaust Gas Recirculation (EGR) System Performance
P2414 Buick Oxygen (O2) Sensor Exhaust Sample Error (Bank 1 – Sensor 1) OBD Code: System: Subsystem: P2414 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Oxygen (O2) Sensor Exhaust Sample Error (Bank 1 – Sensor 1) Location: Analysis: Possible Causes: Oxygen Sensor – Bank 1 – Sensor 1 Tech description: Buick…
P240D Buick ISO / SAE reserved
P240E Buick ISO / SAE reserved OBD Code: System: Subsystem: P240E Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: ISO / SAE reserved Location: Analysis: Possible Causes: Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre…
P240E Buick ISO / SAE reserved
P240F Buick ISO / SAE reserved OBD Code: System: Subsystem: P240F Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: ISO / SAE reserved Location: Analysis: Possible Causes: Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre…
P240F Buick ISO / SAE reserved
P2410 Buick Fuel Cap Sensor / Switch Circuit Low OBD Code: System: Subsystem: P2410 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Fuel Cap Sensor / Switch Circuit Low Location: Analysis: Possible Causes: End of Range – Circuit Lower Than Expected Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse…
P2410 Buick Fuel Cap Sensor / Switch Circuit Low
P2411 Buick Fuel Cap Sensor / Switch Circuit High OBD Code: System: Subsystem: P2411 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Fuel Cap Sensor / Switch Circuit High Location: Analysis: Possible Causes: End of Range – Circuit Higher Than Expected Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse…
P240A Buick Evaporative Emission (EVAP) System Leak Detection Pump Heater Control Circuit / Open
P240B Buick Evaporative Emission (EVAP) System Leak Detection Pump Heater Control Circuit Low OBD Code: System: Subsystem: P240B Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Evaporative Emission (EVAP) System Leak Detection Pump Heater Control Circuit Low Location: Analysis: Possible Causes: End of Range – Circuit Lower Than Expected Tech description: Buick…
P240B Buick Evaporative Emission (EVAP) System Leak Detection Pump Heater Control Circuit Low
P240C Buick Evaporative Emission (EVAP) System Leak Detection Pump Heater Control Circuit High OBD Code: System: Subsystem: P240C Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Evaporative Emission (EVAP) System Leak Detection Pump Heater Control Circuit High Location: Analysis: Possible Causes: End of Range – Circuit Higher Than Expected Tech description: Buick…
P240C Buick Evaporative Emission (EVAP) System Leak Detection Pump Heater Control Circuit High
P240D Buick ISO / SAE reserved OBD Code: System: Subsystem: P240D Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: ISO / SAE reserved Location: Analysis: Possible Causes: Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre…
P2408 Buick Fuel Cap Sensor / Switch Circuit
P2409 Buick Fuel Cap Sensor / Switch Circuit Range / Performance OBD Code: System: Subsystem: P2409 Buick – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Fuel Cap Sensor / Switch Circuit Range / Performance Location: Analysis: Possible Causes: Out of Expected Range Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse…