Trouble codes › P0453
P0453 Evaporative Emission System Pressure Sensor/Switch "A" Circuit High
EVAP
P0453 means the fuel tank pressure sensor's signal is too high, from the sensor, wiring or a blocked vent.
The fuel tank pressure sensor's signal is higher than it should be, usually from a wiring fault, a failed sensor, or pressure in the tank that won't vent.
Safe to drive. It affects emissions testing.
Common causes
- A failed fuel tank pressure sensor
- An open ground or a signal shorted to voltage
- A blocked vent path keeping the tank pressurized
Symptoms
- Check-engine light
- Sometimes a hiss when removing the gas cap or trouble filling
What to check first
- Check the sensor reading with the gas cap off (should be near zero).
- Inspect the connector and wiring.
- Check the vent valve and hose for blockage.
- Replace the sensor if it reads high with the cap off.
What does P0453 mean on your vehicle?
The likely cause depends on your engine. iRepair researches your exact year, make, model and engine (service bulletins, recalls and owner reports) and tells you what to check first. Your first 3 questions are free.
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Related codes
General guidance for P0453 on most vehicles. Some makers use the same code a little differently; confirm in the service information for your vehicle, put safety first, and see a professional when in doubt.