P0456 EVAP System Small Leak Possible causes – Missing or loose fuel cap– Incorrect fuel filler cap used– Fuel filler cap remains open or fails to close– Foreign matter caught in fuel filler cap– Evaporative Emission (EVAP) canister or fuel tank leaks– Evaporative Emission (EVAP) system hose leaking– Fuel tank leaking Tech description 2001 CARAVAN…
Category: OBDii Powertrain Codes
P0457 EVAP System Leak Detected/Fuel Fill Cap Loose Or Missing
P0457 EVAP System Leak Detected/Fuel Fill Cap Loose Or Missing Possible causes – Damaged, missing or loosely installed fuel filler cap Tech description Check for a loose, missing or damage fuel filler the cap. What about the obd code? EVAP control system has a very large leak such as fuel filler cap fell off Symptoms…
P0448 EVAP System Vent Control Circuit Shorted
P0448 EVAP System Vent Control Circuit Shorted Possible causes – Faulty canister vent control valve– Purge Control Valve harness is open or shorted– Purge Control Valve electrical circuit poor connection What about the obd code? EVAP canister vent control valve remains closed under specified driving conditions. Symptoms – Engine Light ON (or Service Engine Soon…
P0449 EVAP System Vent Valve/Solenoid Circuit
P0449 EVAP System Vent Valve/Solenoid Circuit Possible causes – Purge Control Valve harness is open or shorted– Purge Control Valve electrical circuit poor connection– Faulty canister vent control valve What about the obd code? The Engine Control Module (ECM) has determined that a malfunction exists in the electrical circuit for the vent valve/solenoid in the…
P0450 EVAP Emission System Pressure Sensor
P0450 EVAP Emission System Pressure Sensor Possible causes – Faulty Evaporative Emission System (EVAP) Pressure Sensor– Evaporative Emission System (EVAP) Pressure sensor harness is open or shorted– Evaporative Emission System (EVAP) Pressure sensor circuit poor electrical connection– Faulty Engine Control Module (ECM) What about the obd code? – An improper voltage signal from EVAP control…
P0451 Fuel Tank Pressure Sensor Range/Performance
P0451 Fuel Tank Pressure Sensor Range/Performance Possible causes – Fuel Tank Pressure Sensor– Fuel Tank Pressure sensor harness is open or shorted– Fuel Tank Pressure sensor circuit poor electrical connection– Faulty Engine Control Module (ECM) What about the obd code? An improper voltage signal from the fuel tank pressure sensor is sent to Engine Control…
P043f Evaporative Emission System Reference Orifice High Flow
P043f Evaporative Emission System Reference Orifice High Flow Possible causes – Faulty Vacuum Pump Module– Vacuum Pump Module harness is open or shorted– Vacuum Pump Module circuit poor electrical connection.– Faulty Engine Control Module (ECM) What about the obd code? To determine leak criterion (Reference pressure), vacuum pump creates negative pressure in canister pump module…
P0440 EVAP Canister Purge Regulator Valve
P0440 EVAP Canister Purge Regulator Valve Possible causes – Missing or loose fuel cap– Incorrect fuel filler cap used– Fuel filler cap remains open or fails to close– Foreign matter caught in fuel filler cap– EVAP canister or fuel tank leaks– EVAP system hose leaking– Fuel tank leaking Tech description The P0440 code means that…
P0441 EVAP System Incorrect Purge Flow
P0441 EVAP System Incorrect Purge Flow Possible causes – Missing Fuel cap– Incorrect fuel filler cap used– Fuel filler cap remains open or fails to close– Foreign matter caught in fuel filler cap– Incorrect fuel tank vacuum relief valve Tech description The P0441 code means that the control module has detected a leak in the…
P0442 EVAP Control System Leak Detected Small Leak
P0442 EVAP Control System Leak Detected Small Leak Possible causes – Missing or loose fuel cap– Incorrect fuel filler cap used– Fuel filler cap remains open or fails to close– Foreign matter caught in fuel filler cap – EVAP canister or fuel tank leaks– EVAP system hose leaking– Fuel tank leaking Tech description What about…
P0443 EVAP Canister Purge Valve Circuit Malfunction
P0443 EVAP Canister Purge Valve Circuit Malfunction Possible causes – Faulty Evaporative Emission (EVAP) Purge Solenoid Control– Evaporative Emission (EVAP) Purge Solenoid Control harness is open or shorted– Evaporative Emission (EVAP) Purge Solenoid Control circuit poor electrical connection What about the obd code? An improper voltage signal is sent to Engine Control Module (ECM) through…
P0444 Evaporative Emission Control System Purge Control Valve Circuit Open
P0444 Evaporative Emission Control System Purge Control Valve Circuit Open Possible causes – Faulty Evaporative Emission (EVAP) Purge Solenoid Control– Evaporative Emission (EVAP) Purge Solenoid Control harness is open or shorted– Evaporative Emission (EVAP) Purge Solenoid Control circuit poor electrical connection What about the obd code? – An excessively low voltage signal is sent to…
P0445 EVAP Purge Solenoid Circuit
P0445 EVAP Purge Solenoid Circuit Possible causes – Faulty Evaporative Emission (EVAP) Purge Solenoid Control– Evaporative Emission (EVAP) Purge Solenoid Control harness is open or shorted– Evaporative Emission (EVAP) Purge Solenoid Control circuit poor electrical connection What about the obd code? – An excessively high voltage signal is sent to Engine Control Module (ECM) through…
P0446 Evaporative Emission Vent System Performance
P0446 Evaporative Emission Vent System Performance Possible causes – Plugged vapor canister– Faulty vent solenoid– Pinched or blocked EVAP hose– Faulty FTP sensor Tech description Dirt and dust intrusion into the EVAP canister vent hose assembly, resulting in restricted air flow, may cause this condition. What about the obd code? The Powertrain Control Module (PCM)…
P0447 EVAP System Vent Control Circuit Open
P0447 EVAP System Vent Control Circuit Open Possible causes – Faulty canister vent control valve– Purge Control Valve harness is open or shorted– Purge Control Valve electrical circuit poor connection What about the obd code? An improper voltage signal is sent to Engine Control Module (ECM) through Evaporative Emission System (EVAP) canister vent control valve….
P043B Catalyst Temperature Sensor Circuit Range / Performance (Bank 2 – Sensor 2)
P043B Catalyst Temperature Sensor Circuit Range / Performance (Bank 2 – Sensor 2) OBD Code: System: Subsystem: P043B – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Catalyst Temperature Sensor Circuit Range / Performance (Bank 2 – Sensor 2) Location: Analysis: Possible Causes: Bank 2 – Sensor 2 Out of Expected Range Tech description:
P043C Catalyst Temperature Sensor Circuit Low (Bank 2 – Sensor 2)
P043C Catalyst Temperature Sensor Circuit Low (Bank 2 – Sensor 2) OBD Code: System: Subsystem: P043C – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Catalyst Temperature Sensor Circuit Low (Bank 2 – Sensor 2) Location: Analysis: Possible Causes: Bank 2 – Sensor 2 End of Range – Circuit Lower Than Expected Tech description:
P043D Catalyst Temperature Sensor Circuit High (Bank 2 – Sensor 2)
P043D Catalyst Temperature Sensor Circuit High (Bank 2 – Sensor 2) OBD Code: System: Subsystem: P043D – (ASE) Powertrain Auxiliary Emission Controls Trouble Code Description: Catalyst Temperature Sensor Circuit High (Bank 2 – Sensor 2) Location: Analysis: Possible Causes: Bank 2 – Sensor 2 End of Range – Circuit Higher Than Expected Tech description:
P0434 Heated Catalyst Temperature Below Threshold Bank 2
P0434 Heated Catalyst Temperature Below Threshold Bank 2 Possible causes – Air leak before catalytic converter– Faulty oxygen sensor– Faulty Catalytic Converter Tech description As the code description implies the P0434 code means that the vehicle’s control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the…
P0435 Catalyst Temperature Sensor Circuit Bank 2 Sensor 1
P0435 Catalyst Temperature Sensor Circuit Bank 2 Sensor 1 Possible causes – Catalyst Temperature Sensor harness is open or shorted– Catalyst Temperature Sensor circuit poor electrical connection– Faulty Catalyst Temperature Sensor Tech description As the code description implies the P0435 code means that the vehicle’s control module has detected that the three-way catalytic converter is…