P0453

EVAP System Pressure Sensor/Switch Circuit High

Car Fault Codes Emissions & exhaust

Can you still drive? Yes, normally

Who can fix it? Needs a workshop

Typical repair time 30 minutes – 3 hours

Typical cost SAR 100 to 900

What it means

The engine computer has detected that the fuel tank pressure sensor signal is above its allowed maximum. This usually means an open ground or signal wire, a short to a voltage source or a failed sensor, so the pressure reading cannot be trusted.

Symptoms4

Check engine light on.
Usually no driving symptoms.
EVAP self-test stops running.
Failed emissions test.

Possible causes5

Open ground wire to the sensor.
Open signal wire or a disconnected connector.
Signal wire shorted to a power wire.
Failed fuel tank pressure sensor.
Connector terminals corroded by water.

How to diagnose5

Watch the sensor reading on a scan tool and compare it with the manufacturer specification.
Check the ground at the sensor connector.
Check continuity of the signal wire between the sensor and the computer.
Inspect the wiring for a short to a power wire.
Check the connector for corrosion or looseness.

How to fix5

Clean or replace the connector.
Repair the open ground or signal wire.
Repair the short to the power wire.
Replace the tank pressure sensor if it is proven faulty.
Clear the codes and confirm the reading is back in range.

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 ground or connector fault, and rises if the fuel tank must be lowered to replace the sensor.

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

What is the difference between P0452 and P0453?

P0452 means the signal is too low, usually from a short to ground. P0453 means it is too high, usually from an open ground or signal wire.

Can I drive with this code?

Yes. It does not affect the engine, but repair it before an emissions test.

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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