P0443

EVAP System Purge Control Valve "A" Circuit

Car Fault Codes Emissions & exhaust

Can you still drive? Yes, normally

Who can fix it? DIY with some experience

Typical repair time 20 minutes – 1.5 hours

Typical cost SAR 100 to 500

What it means

The engine computer has detected an electrical fault in the purge valve circuit. The purge valve is opened by the computer to draw fuel vapor from the charcoal canister into the engine, so a fault stops vapor purging or makes it uncontrolled.

Symptoms4

Check engine light on.
Usually no driving symptoms.
Occasional light fuel smell.
Hard starting after refueling if the valve stays open.

Possible causes5

Corroded or loose purge valve connector.
Failed internal purge valve coil.
Open or shorted wiring in the circuit.
Blown fuse feeding the valve on some vehicles.
Faulty driver circuit inside the engine computer (rare).

How to diagnose5

Visually inspect the connector and wiring for corrosion or damage.
Check for voltage at the connector with the ignition on.
Measure the valve coil resistance and compare it with the manufacturer specification.
Command the valve with a scan tool and feel for it clicking.
Check the control wire to the computer for continuity and shorts.

How to fix5

Clean or repair the connector.
Repair open or shorted wiring.
Replace the fuse after finding why it blew.
Replace the purge valve if its resistance is out of specification.
Clear the codes and confirm the code does not return.

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 wiring fault, and reaches the upper end when the purge valve is replaced along with the diagnosis fee.

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 this code affect engine performance?

Usually not, but if the valve sticks open you may notice hard starting after refueling or an unstable idle.

How do I know the valve itself is faulty?

If voltage reaches the connector and the wiring is good, but the coil resistance is out of specification or the valve does not respond when commanded, the valve is at fault.

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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