P0453
Low SeverityEVAP Pressure Sensor High
EVAP System
P0453 — Instant Answer
EVAP Pressure Sensor High
Severity: LOW SEVERITY
Meaning: Fuel tank pressure sensor reads too high.
Safe to drive? Usually yes with caution, but confirm root cause before long trips.
Estimated repair cost: $30 - $80
Most common causes:
- 1. Open circuit in sensor (35-45% of cases)
- 2. Disconnected connector (10-25% of cases)
- 3. Blocked vent causing tank pressure (10-25% of cases)
Common Causes
How to Diagnose P0453
- 1Check connector
- 2Test sensor
- 3Check vent valve
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Repair guides, symptom pages, and wiring diagrams related to P0453.
Related Codes
Fault in the fuel tank pressure sensor that monitors EVAP system for leaks.
Fuel tank pressure sensor reads too low.
Fault in the EVAP vent valve circuit. The vent valve allows the EVAP system to breathe.
Frequently Asked Questions
- Can a blocked vent cause P0453?
- Yes — if the tank cannot vent, pressure builds up, and the sensor correctly reads high. Fix the vent issue.
- Will this affect gas pump shutoff?
- Possibly — high tank pressure can cause the pump nozzle to click off repeatedly.
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Author & Review
Written by AllOEMManuals Editorial Team. Reviewed by ASE-certified technicians and updated with factory-reference checks for fitment-sensitive steps.
This guide was drafted with AI assistance and reviewed for accuracy by a human editor.
Last updated: 2026-05-07