What does code P0450 mean?

Q: What does code P0450 mean?

Evaporative Emission System Pressure Sensor/Switch. P0450 means the engine computer has detected an implausible or out-of-range signal from the evaporative emission (EVAP) system pressure sensor, which monitors fuel vapor pressure in the fuel tank. The computer expects the sensor voltage to fall within a specific range under key-on, engine-off and running conditions, and this code sets when the reading is too high, too low, or inconsistent with other EVAP system inputs.

DTC codes / P04xx · Auxiliary emission controls / P0450

P0450Evaporative Emission System Pressure Sensor/Switch

P0450 means the engine computer has detected an implausible or out-of-range signal from the evaporative emission (EVAP) system pressure sensor, which monitors fuel vapor pressure in the fuel tank. The computer expects the sensor voltage to fall within a specific range under key-on, engine-off and running conditions, and this code sets when the reading is too high, too low, or inconsistent with other EVAP system inputs.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaAuxiliary emission controls

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.