EGR
Services
EGR fault diagnosis, valve cleaning and testing, and ECU software configuration for commercial vehicles, trucks, vans, and diesel cars. Manufacturer-level diagnostic equipment as standard.
What Is the EGR Valve?
The EGR (Exhaust Gas Recirculation) valve is designed to open and close electronically at specific points in the rev range, routing a portion of exhaust gas back into the intake manifold. This lowers combustion temperature and reduces NOx emissions.
These valves are subject to heavy carbon accumulation from exhaust gases over time. Carbon buildup on the valve seat, butterfly, or position sensor causes the valve to fail to open or close correctly — or in severe cases, to seize entirely.
A malfunctioning EGR can trigger warning lights, fault codes, reduced power, and in commercial vehicles, a full engine derate. Accurate diagnosis is essential to distinguish valve failure from sensor, wiring, or ECU software causes.
Common EGR Fault Symptoms
Clean EGR valve
Carbon-fouled EGR valve
Our Diagnostic Approach
Vehicle Coverage
We carry out EGR diagnostic and software work across the commercial vehicle range as well as diesel cars and vans. Coverage depends on the emissions system, available manufacturer diagnostic access and the vehicle's ECU type.
Diagnostic Equipment
Accurate EGR diagnosis requires the OEM tool for each manufacturer. Generic OBD readers cannot access manufacturer-specific live data parameters for EGR position, flow, and adaptation values.
Frequently Asked Questions
Start Here
EGR Issue? Check Your Vehicle
Enter your registration and we'll confirm which EGR services are available for your specific vehicle.
EGR Fault? Contact ECUFLASH
Let us diagnose the fault properly before any parts are ordered. Most EGR faults can be identified in a single diagnostic session.