Exhaust Gas Recirculation Flow Excessive
What it means
More exhaust is entering the engine than intended, or it is entering when it should not, such as at idle. The usual cause is an EGR valve stuck open by carbon, which chokes the engine at low speeds.
Symptoms4
- Very rough idle or stalling.
- Hard starting.
- Hesitation when pulling away.
- Check engine light on.
Possible causes5
- EGR valve held open by a carbon flake.
- Vacuum control solenoid supplying vacuum constantly.
- Faulty valve position sensor.
- Vacuum hoses routed incorrectly.
- Faulty exhaust pressure sensor on some vehicles.
How to diagnose and fix5
- Inspect vacuum hoses and confirm correct routing.
- Remove the EGR valve, confirm it closes fully and clean off carbon.
- Test the vacuum solenoid or electronic valve circuit.
- Monitor the valve position sensor reading with a scan tool.
- Replace the valve if it still will not close after cleaning.
Repair cost
In Saudi riyals; the highlighted part is the expected range for this fault.
Cleaning, a hose or a small control solenoid stays in the lowest tier, while a complete EGR valve may reach the second.
Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Frequently asked questions
Why does the engine stall only at traffic lights?
At idle the engine needs clean air, and extra exhaust smothers it. While driving the engine tolerates it better, so the problem is less noticeable.
Can I drive to the workshop?
Yes, with care. If the engine stalls at idle, avoid heavy traffic and risky junctions, and keep a generous following distance.
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.
Report a mistake
Spotted something inaccurate? Tell us and we will review and correct it.
Report received — thank you
This is your private tracking link. It shows the status and our reply as soon as it is posted.
The link is saved in this browser only.