PowertrainP0450
CautionSeverity: Caution - get it checked when you can
Evaporative Emission Control System Pressure Sensor
Key terms: Catalytic converter: cleans the exhaust gases · EGR: exhaust gas recirculation, which cuts harmful gases · EVAP: the system that traps fuel vapour · Oxygen sensor: measures oxygen in the exhaust gas · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions
1What it means in plain English
This range covers emissions control (EGR, EVAP, oxygen sensors and the catalytic converter), but some manufacturers also use P04 codes for oil-pressure, brake-fluid and coolant-level warnings.
2Common causes
- Clogged or faulty EGR valve
- EVAP system leak (hoses, canister, fuel cap)
- Faulty oxygen sensor
- Ageing catalytic converter
- Low oil, brake fluid or coolant (on some models)
- Wiring or connector fault
3Can I drive?
Do not assume this code is safe to drive. Check the description: if it names oil pressure, brake fluid, coolant, or a brake fault, stop safely and have it diagnosed before driving. Emissions-only codes (EGR, EVAP, catalyst) should still be checked before an emissions or roadworthiness inspection.
This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.
4Brand data 37
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P0450 | Exhaust Gas Control. B Solenoid Valve. Valve Position. Operation Failure Brand | Powertrain |
| BAIC Motor | P0450 | Evaporative Emission System Pressure Sensor/Switch Brand | Powertrain |
| Mercedes-Benz | P0450 | Evaporative Emission Control System Pressure Sensor SAE | Powertrain |
| BMW | P0450 | Evaporative Emission Contr. Syst. Press. Sensor Brand | Powertrain |
| BYD | P0450 | EVAP. emission PRS. sensor Brand | Powertrain |
| Chery | P0450 | EVAP. emission PRS. sensor Brand | Powertrain |
| Daewoo | P0450 | Evaporative Emission System Pressure Sensor/Switch Brand | Powertrain |
| DFFS | P0450 | Evaporative Emission System Pressure Sensor/Switch Brand | Powertrain |
| DFFX | P0450 | EVAP. emission PRS. sensor Brand | Powertrain |
| DFXK | P0450 | Fuel tank pressure sensor signal fault Brand | Powertrain |
| EOBD | P0450 | EVAP-system trykksensor/bryter 'A'-krets Brand | Powertrain |
| Ford | P0450 | Evaporative Emission Control System Pressure Sensor SAE | Powertrain |
| Geely | P0450 | EVAP. emission PRS. sensor Brand | Powertrain |
| GM | P0450 | Vehicle speed sensor circuit Brand | Powertrain |
| Great Wall | P0450 | EVAP. emission PRS. sensor Brand | Powertrain |
| Hafei | P0450 | EVAP. emission PRS. sensor Brand | Powertrain |
| Holden | P0450 | Fuel Tank Pressure Sensor Circuit Brand | Powertrain |
| Honda | P0450 | Evaporative Emission Control System Pressure Sensor SAE | Powertrain |
| Hyundai | P0450 | Evaporative Emission Control System Pressure Sensor SAE | Powertrain |
| Isuzu | P0450 | Evaporative Emission Control System Pressure Sensor SAE | Powertrain |
| Land Rover | P0450 | Evaporative Emission Control System Pressure Sensor SAE | Powertrain |
| Mazda | P0450 | Evaporative Emission Control System Pressure Sensor SAE | Powertrain |
| Mitsubishi | P0450 | EVAP. emission PRS. sensor Brand | Powertrain |
| Nissan | P0450 | Evaporative Emission Control System Pressure Sensor SAE | Powertrain |
| Opel | P0450 | Vehicle speed sensor circuit Brand | Powertrain |
| Peugeot | P0450 | Evaporative Emission Control System Pressure Sensor SAE | Powertrain |
| Porsche | P0450 | Evaporative Emission Control System Pressure Sensor SAE | Powertrain |
| Proton | P0450 | EVAP. emission PRS. sensor Brand | Powertrain |
| Saab | P0450 | Vehicle speed sensor circuit Brand | Powertrain |
| MG (SAIC) | P0450 | Evaporative Emission System Pressure Sensor/Switch Brand | Powertrain |
| Smart | P0450 | Evaporative Emission Control System Pressure Sensor SAE | Powertrain |
| Sprinter | P0450 | Evaporative Emission Control System Pressure Sensor SAE | Powertrain |
| Subaru | P0450 | Evaporative Emission Control System Pressure Sensor SAE | Powertrain |
| Suzuki | P0450 | Evaporative emission control system pressure sensor malfunction Brand | Powertrain |
| Tata | P0450 | Evaporative Emission System Pressure Sensor/Switch Brand | Powertrain |
| Toyota | P0450 | Evaporative emission system (EVAP) pressure sensor fault Brand | Powertrain |
| Volkswagen | P0450 | EVAP system pressure sensor: malfunction; Short to plus Brand | Powertrain |
Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.
5Extended variant codes 1
These 7-character codes are manufacturer-specific variants of P0450 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| SsangYong | P045000 | Fuel tank pressure sensor malfunction Brand | Powertrain |
6Related codes
Browse Pxxx codes or P045xx codes.