P1454

Fuel Tank Pressure Sensor Range/Performance

Car Fault Codes Honda Emissions & exhaust

Can you still drive? Yes, normally

Who can fix it? Needs a workshop

Typical repair time 30 minutes – 2 hours

Typical cost SAR 100 to 700

What it means

This is a Honda- and Acura-specific code; the same number can mean something different on other makes. The fuel tank pressure sensor in the EVAP system is not changing the way the engine computer expects during the system test. The cause is either the sensor itself or something stopping it from reading the real pressure.

Models covered: Honda and Acura models, mainly around 1996–2005.

Symptoms3

Check engine light on, usually with no driving symptoms.
An EVAP leak code may be stored with it.
The car may fail an emissions check because the EVAP test cannot finish.

Possible causes5

Faulty fuel tank pressure sensor.
Blocked or disconnected hose or port the sensor reads from.
Faulty two-way valve next to the sensor.
Corroded or loose sensor connector or wiring.
Problem with the sensor reference voltage supply.

How to diagnose5

Read tank pressure with a scan tool with the cap removed; it should be close to atmospheric.
Close the cap and watch the reading change while the engine runs and the system is tested.
Inspect the hose and port feeding the sensor for blockage or disconnection.
Measure supply, ground and signal at the sensor and compare with the manufacturer specification.
Check the connector for corrosion and moisture.

How to fix5

Clean the connector or repair the damaged wire.
Clear the blocked hose or refit it.
Replace the two-way valve if it is faulty.
Replace the fuel tank pressure sensor.
Clear the code and confirm the EVAP test completes.

Repair cost

0–500

500–2,000

2,000–5,000

5,000+

In Saudi riyals; the highlighted part is the expected range for this fault.

The cost is low for a connector or hose repair, and rises for a new sensor or the nearby valve, depending on access.

Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026

Frequently asked questions

Does P1454 affect engine performance?

Usually not. It concerns fuel vapor monitoring, but it stops the computer from testing the EVAP system for leaks correctly.

Should I replace the sensor right away?

First check the reading with the cap off and inspect the hose and connector, because a blockage or corrosion can set the same code.

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This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.

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