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P0454: Evaporative Emission Control System Pressure Sensor Intermittent

Quick Answer

Safe to drive (short-term)

P0454 means the ECU detected an intermittent fault in the EVAP system fuel tank pressure (FTP) sensor signal. The sensor is typically mounted on top of the fuel tank or in the fuel pump module and reports tank pressure to the ECU during EVAP self-tests. Intermittent codes usually point to wiring issues, a flaky connector, or a sensor in early failure.

Severity
Low · EVAP System
Estimated repair cost
From €60 to €900+, varies by vehicle

€60 or €900, depending on your car.

  • Repair connector or wiring at FTP sensor€60–€190
  • Replace fuel pump module with integrated FTP sensor€350–€900

A scan shows whether P0454 is really stored on your car, which codes sit next to it and how urgent each one is.

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What does P0454 mean?

P0454 is a evap system-related diagnostic trouble code classified as low severity.

Where it is on the car

  1. Fuel filler cap
  2. Fuel tank pressure sensor
  3. Charcoal canister
  4. Vent valve (to fresh air)
  5. Purge valve
  6. Intake manifold and engine

What are the symptoms of P0454?

  • Check engine light illuminated, sometimes flickering on and off
  • Rejection at an emissions test
  • EVAP readiness monitor stays incomplete
  • No noticeable driveability issues
  • May appear alongside other EVAP leak codes if the sensor reading is unreliable

What causes P0454?

  • Loose or corroded fuel tank pressure sensor connector

    : high

  • Chafed or damaged wiring to the FTP sensor

    : high

  • Failing FTP sensor (intermittent internal fault)

    : medium

  • Water intrusion into the in-tank wiring harness

    : medium

  • Poor ground at the fuel pump module

    : low

Is it safe to drive with P0454?

Generally yes, for short-term driving. P0454 is an intermittent sensor fault and does not affect engine performance or safety. Drive normally, but a lit check engine light is a standard reason for rejection at a periodic emissions inspection, and each country runs that test to its own rules, so book the repair before the test is due.

How do you diagnose P0454?

  1. Read freeze frame data to see what the FTP sensor reported when the code set. Compare to atmospheric pressure (around 101 kPa). Wild swings or readings far from atmospheric indicate sensor or wiring issues
  2. Access the FTP sensor. On most vehicles it is on top of the fuel tank, requiring you to drop the tank or access through a service hatch under the rear seat. Inspect the connector for moisture or corrosion
  3. Wiggle-test the connector and harness with the engine running while watching the tank pressure reading. Some cars report it as standard OBD2 live data; on others it needs manufacturer-level software. Sudden jumps in the reading during the wiggle confirm a connection fault
  4. Measure sensor reference voltage (typically 5V) and ground at the connector with the key on. Missing voltage or ground means the harness or ECU side has the fault
  5. If wiring is good, swap in a known good FTP sensor and clear the code. Drive several cycles to confirm the intermittent fault has cleared

How much does P0454 cost to fix?

Repair Parts Cost Labor Cost Total Estimate DIY Difficulty
Repair connector or wiring at FTP sensor €10–€40 €50–€150 €60–€190 Moderate
Replace fuel tank pressure sensor €40–€150 €80–€200 €120–€350 Professional
Replace fuel pump module with integrated FTP sensor €200–€600 €150–€300 €350–€900 Professional

Prices estimated as of October 2026. Costs vary by region, vehicle, and shop.

P0454 on specific vehicles

P0454 on BMW

BMW 3 Series

See BMW-specific causes & cost

P0454 on Volkswagen

Volkswagen Golf

See Volkswagen-specific causes & cost

P0454 on Audi

Audi A4

See Audi-specific causes & cost

P0454 on Ford

Ford Focus

See Ford-specific causes & cost

Common questions about P0454

Why is P0454 hard to diagnose?
Intermittent codes are notoriously difficult because the fault is not present when you're testing. The best approach is to read freeze frame data, look for patterns (cold weather, after refuelling, over bumps), and do a thorough wiggle-test of the connector and harness while watching live data.
Will P0454 clear itself?
If the underlying intermittent fault stops occurring (for example, a marginal connector that eventually re-seats itself), the code can clear after several successful drive cycles. However, intermittent issues usually return and worsen over time. Better to diagnose and fix the root cause.
Can I replace the FTP sensor myself?
It depends on the vehicle. On some models the sensor is accessible through a hatch under the rear seat, making it a one-hour DIY. On others it requires dropping the fuel tank, which is a 3 to 5 hour professional job and 150 to 300 EUR labour. Check your specific model before committing.
Why did P0454 appear after a wet weather drive?
Water intrusion into the FTP sensor connector or the underbody harness is a frequent intermittent fault trigger. Cars driven through standing water, in heavy rain, or in winter slush conditions can develop corrosion in the connector that only manifests when the connection is damp. Clean and dry the connector and apply dielectric grease.

Read our detailed guides

Sources

  1. publications.jrc.ec.europa.eu publications.jrc.ec.europa.eu/repository/bitstream/JRC77061/final_evap_report_on

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