P0450

EVAP System Pressure Sensor/Switch A Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$22–89 (est.)

Symptoms

Check Engine Light Is On
Slight deterioration in engine performance
The smell of gasoline in the interior or around the car (rare)

Causes

Open or short circuit in EVAP pressure sensor wiring harness
Faulty EVAP pressure sensor
Damaged or oxidized sensor connectors
Problems with the engine control unit (rare)

How to Fix

Check the sensor wiring harness for damage and corrosion.
Check the sensor connectors for reliable connections
Check the functionality of the EVAP pressure sensor using a diagnostic scanner
Replace EVAP pressure sensor if necessary
Clean or replace connectors if oxidation is present

Related codes

P0440 P0441 P0442