Description

Function of the EGR Valve

The Exhaust Gas Recirculation (EGR) valve recirculates a controlled amount of exhaust gas back into the intake manifold. This dilutes the incoming air charge, lowering combustion temperatures and significantly reducing harmful nitrogen oxide (NOx) emissions. A stuck-open EGR valve causes rough idle, stalling, and poor performance. A stuck-closed valve increases NOx emissions and may cause engine knock. Carbon buildup is the most common cause of EGR failure in diesel engines.

Common Diagnostic Trouble Codes (DTCs)

A generic OBD reader displays the standard 5-character code shown below.

• P0401 — Exhaust Gas Recirculation Flow Insufficient Detected (valve stuck closed / clogged)
• P0403 — Exhaust Gas Recirculation Control Circuit / Open
• P0404 — Exhaust Gas Recirculation Control Circuit Range/Performance
• P0405 — Exhaust Gas Recirculation Sensor A Circuit Low (position feedback)

Why order it from Partszar

An air or exhaust fault strangles the engine and pushes up fuel consumption, and left alone it sends unmetered air, soot or oil into the turbo and the DPF. Fix the small part and the big ones stay out of the workshop.

• Fitment checked before it is listed. Every part is cross-referenced against the official parts catalogue and OEM part number so it fits first time. If your vehicle is listed above, this is the one you need. Not sure? Send us your VIN using the contact form below and we confirm the exact part for free, no obligation.
• Dispatched fast, tracked to your door. In-stock parts leave within 1 to 2 business days and reach you anywhere in South Africa in 2 to 5 business days with tracking. Back-order parts are sourced directly from our supplier, typically 3 to 4 weeks, and we keep you updated by email.
• Decide with confidence. Selected parts carry our 6-month limited guarantee when fitted by an RMI-approved mechanic. Not sure about anything? Contact us below before you order.

It is normal to second-guess a purchase this size. The short version: it is cross-referenced to your engine, it is the part the workshop calls for, and if you send us your VIN through the form below first there is nothing left to doubt.

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