P0450 OBD-II: Evaporative Emission System Pressure Sensor/Switch

P0450 Severity

Moderate

Will P0450 go away on its own?

Once the vehicle's onboard system no longer detects the issue, most codes will disappear on their own. If your vehicle still has this code, however, it should be properly diagnosed to avoid a more serious problem.

For a proper diagnosis, RepairPal Certified shops have the equipment, tools, and expertise.

Moderate severity codes might not threaten the vehicle's safety or functionality immediately, but you should still get it diagnosed within a reasonable time frame to keep your car running well.

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What causes OBD-II fault code P0450?

The evaporative control (EVAP) system captures any fuel vapors from the fuel tank and sends them through the vehicle's intake to be burned in the normal combustion process. The EVAP Pressure Sensor/Switch tells the engine control module (PCM) how much pressure or vacuum is in the fuel tank so the rest of the EVAP system to act accordingly. When the PCM detects an inaccurate signal from the pressure sensor, it will set code P0450.

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Other OBD-II Codes

P044F: Secondary Air Injection System Switching Valve "A" Circuit HighP044E: Exhaust Gas Recirculation Sensor "C" Circuit Intermittent/ErraticP044D: Exhaust Gas Recirculation Sensor "C" Circuit HighP044C: Exhaust Gas Recirculation Sensor "C" Circuit LowP044B: Exhaust Gas Recirculation Sensor "C" Circuit Range/PerformanceP044A: Exhaust Gas Recirculation Sensor "C" CircuitP0449: Evaporative Emission System Vent Valve/Solenoid CircuitP0448: Evaporative Emission System Vent Control Circuit ShortedP0447: Evaporative Emission System Vent Control Circuit OpenP0446: Evaporative Emission System Vent Control CircuitP0445: Evaporative Emission System Purge Control Valve Circuit ShortedP0444: Evaporative Emission System Purge Control Valve Circuit OpenP0451: Evaporative Emission System Pressure Sensor/SwitchP0452: Evaporative Emission System Pressure Sensor/Switch LowP0453: Evaporative Emission System Pressure Sensor/Switch HighP0454: Evaporative Emission System Pressure Sensor/Switch IntermittentP0455: Evaporative Emission System Leak Detected (large leak)P0456: Evaporative Emission System Leak Detected (very small leak)P0457: Evaporative Emission System Leak Detected (fuel cap loose/off)P0458: Evaporative Emission System Purge Control Valve Circuit LowP0459: Evaporative Emission System Purge Control Valve Circuit HighP045A: Exhaust Gas Recirculation "B" Control CircuitP045B: Exhaust Gas Recirculation "B" Control Circuit Range/PerformanceP045C: Exhaust Gas Recirculation "B" Control Circuit Low