EGR Solutions

The Exhaust Gas Recirculation (EGR) system is designed to reduce harmful emissions by recirculating a portion of exhaust gases back into the engine. While essential for cleaner emissions, the EGR system can become clogged or fail over time—leading to reduced performance, warning lights, or even engine damage.


At Hill Vehicle Services, we offer expert diagnostics, cleaning, and repair services to keep your EGR system functioning properly and your vehicle running smoothly.


Common EGR Issues

EGR systems are prone to carbon build-up and mechanical failure. Here are some of the most common problems:



  • Carbon Deposits – Soot and carbon can block the EGR valve or cooler, restricting airflow and causing performance issues.


  • Sticky or Stuck Valves – The valve may get stuck open or closed, leading to rough idling, stalling, or poor acceleration.


  • EGR Cooler Failure – Leaks or cracks in the cooler can result in coolant loss or engine overheating.


  • Warning Lights or Fault Codes – A faulty EGR system often triggers engine warning lights or limp mode.


  • MOT Emissions Failures – A malfunctioning EGR system can lead to increased emissions and MOT test failures.


Our Comprehensive

EGR Solutions Process

01

Initial Diagnosis

We start with a full diagnostic scan and physical inspection of the EGR system to identify the cause of the issue, whether it’s a stuck valve, sensor fault, or excessive carbon build-up.

02

Repair & Clean

We clean out carbon deposits, repair faulty components, or replace the EGR valve or cooler if necessary. All work is done using high-quality parts and manufacturer-recommended procedures.

03

Reset & Road Test

Once repairs are complete, we reset the system and carry out a full road test to ensure everything is working perfectly. You’ll leave with a fully functioning, emissions-compliant vehicle.

Callie. D

Highly recommend friendly & extremely helpful. My car was taken in for diagnostics and repaired the same day, I was expecting it to be a big / expensive problem but this garage was extremely thorough & honest and ended up costing a lot less that I expected.

Sophie. D

Mike found the root cause of the issue and there was no problem with the filter itself. Mike rectified the issue and I collected my car the next day, amazing service and great people!!

Judith. S

What a great company, when I called them my car had previously been misdiagnosed at a different garage at a significant cost, when I spoke to Mike he asked me a lot of questions, and I dropped my car at a easy location, he had the car for a few hours and I had a full assessment report and he talked me through what was required, later that day my car was ready for collection dash light free!! Would highly recommend

Frequently Asked Questions About EGR Solutions

What is the purpose of the EGR system?

The EGR (Exhaust Gas Recirculation) system helps reduce harmful NOx emissions by recirculating a portion of exhaust gases back into the combustion chamber. This lowers combustion temperatures and improves emissions performance.

What are the signs of a faulty EGR valve?

Common symptoms include rough idling, reduced power, increased fuel consumption, engine knocking, and warning lights. In some cases, the vehicle may enter limp mode.

Can a clogged EGR valve be cleaned?

Yes, in many cases a carbon-clogged EGR valve can be professionally cleaned, restoring proper function without the need for replacement.

Is EGR removal legal in the UK?

No. EGR delete or removal is illegal for vehicles used on public roads and will cause your vehicle to fail its MOT. At Demo Website, EGR delete services are available strictly for off-road use only, such as motorsport or agricultural vehicles.

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