Kernowsport Diagnostics & Tuning – Viezu-Approved Mobile ECU Remapping Services in Hayle, Cornwall

Ford Ranger 2.2TD in Helston with DPF software fault being resolved.

Ford Ranger DPF Software Fix in Helston

At Kernowsport, we regularly support main dealers and independent garages when vehicles fall outside their tooling capabilities or present unusual software issues. This time, we were called to Helston to assist with a Ford Ranger 2.2TD that had developed DPF-related fault codes following a routine dealer software update. When Dealer Updates Clash with Previous Modifications Unbeknown to the dealership, this Ranger had previously undergone a DPF delete. When Ford’s latest software update was applied, it reintroduced emissions checks—triggering fault codes and illuminating the engine management light. The owner was left with two options: Unsurprisingly, they opted for the more cost-effective software solution. Professional OBD Programming with the Right Equipment Using our Alientech KESS 3, we carried out a safe and controlled OBD ECU write, ensuring the vehicle’s software correctly reflected its current configuration. This job also marked the first proper outing of our fully equipped VW Caddy, allowing us to put our CTEK battery conditioner to work during live programming—maintaining perfect voltage stability throughout the process. Reliable power management is essential during ECU work, and it’s one of the many small details that separates professional remapping from risky shortcuts. Back on the Road – Fault-Free and Running Right Despite a

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Fiat Ducato 2.3 campervan in Porthleven before performance remap.

Fiat Ducato Camper Remap in Porthleven

Another Fiat Ducato camper remap for Kernowsport, this time in Porthleven, just a short hop from our base in Hayle—and conveniently close to one of our favourite coffee spots at Origin. Any excuse! This 2.3-litre Fiat Ducato camper belonged to a lovely couple visiting Cornwall from Wales, spending the New Year exploring the county. After the long, slow drive down, they decided the van needed more usable power and better driveability—especially for hills and motorway cruising. Not All Remaps Are Created Equal We carried out a full ECU read using our Alientech KESS 3, before sending the original file to our trusted file partners at VIEZU for analysis and calibration. What we discovered was unexpected. Despite the owners being unhappy with the performance, the vehicle had already been remapped previously. On closer inspection, the existing map was missing several critical elements, meaning the engine was never delivering its full potential. This is, unfortunately, more common than many owners realise. Unlocking the True Potential with a Proper Calibration Thanks to VIEZU’s experience as the UK’s most established tuning provider, the file was completely rewritten and optimised correctly for this engine. Once applied, the difference was immediate:✔ Stronger mid-range torque✔ Improved throttle

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Citroën C4 parked in Launceston for AdBlue delete by Kernowsport.

Last-Minute Citroën C4 AdBlue Delete – Launceston

Another last-minute AdBlue problem just before Christmas had us heading east to Launceston, this time to work on a late-model Citroën C4 fitted with the notoriously troublesome 1.5D engine. These engines are well known for AdBlue system faults and no-start countdowns, and this vehicle was no exception. With the festive period fast approaching, the owner needed the issue resolved quickly—and reliably. Specialist Tools for Common AdBlue Problems At Kernowsport, we work on so many Stellantis-group vehicles (Citroën, Peugeot, Vauxhall, Fiat) that we’ve invested in specialist ECU leads specifically for the 1.5D platform. Without this lead, the ECU normally has to be removed from the vehicle and bench-programmed. With our setup, we can simply connect directly to the ECU under the bonnet, dramatically reducing labour time and disruption. The result?✔ No ECU removal✔ No unnecessary dismantling✔ Around one hour saved on the job What used to be one of our least-favourite vehicles to work on has now become one of the quickest and most efficient. Back on the Road in Under an Hour With a total turnaround time of less than an hour, the AdBlue countdown was permanently resolved and the Citroën C4 was back to full usability. Most importantly, the

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Peugeot 308 parked in St Austell for AdBlue delete and remap by Kernowsport.

Peugeot 308 AdBlue Delete & Blend Remap – St Austell

One of our final jobs before Christmas took us over to St Austell to work on this Peugeot 308, carrying out an AdBlue delete alongside a blend performance remap. It was a slightly last-minute booking, but we were keen to fit it in so the owner could enjoy worry-free motoring over the holiday period—without the stress of an AdBlue countdown or no-start scenario. Helping Cornwall Keep Moving Living in Cornwall without a car is challenging at the best of times, especially around Christmas. That’s why we were more than happy to head up to St Austell and get this Peugeot back on the road quickly and reliably. AdBlue faults are becoming increasingly common on modern Peugeot diesel models, and the 308 is no exception. Once the warning countdown begins, the vehicle can become unusable—something no one wants just before the holidays. AdBlue Delete with a Sensible Performance Upgrade While resolving the AdBlue issue, we also installed one of our popular blend remaps. This type of tune is ideal for daily drivers, offering: It’s a perfect setup for Cornish roads and hills, especially around the St Austell area, where a little extra pulling power makes everyday driving far more relaxed. Quick

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Ford Mondeo 2.0 ST parked in St Erth near Hayle for Stage 1 remap by Kernowsport.

Ford Mondeo 2.0 ST Stage 1 Remap – St Erth, Near Hayle

Our first job after Christmas took us just down the road to St Erth near Hayle, making it a perfect local start to the year for Kernowsport. The vehicle was a cracking Ford Mondeo 2.0 ST, and it also marked the first outing of the year for our fully equipped VW Caddy mobile tuning van. A Proper Local Job for Kernowsport Being so close to home, this job was a great opportunity to put our on-board CTEK battery conditioner and KESS 3 ECU tuning system through their paces in real-world conditions. Stable voltage and professional tools are essential when reading and writing an ECU—and this setup ensures consistent, safe results every time. The owner, William, had paid top money for this Mondeo and it showed. The car was in excellent condition and a great example of a model we don’t see as often these days, with many drivers opting for newer or alternative brands. Stage 1 Performance Remap – Tailored, Not Generic We carried out a Stage 1 performance remap, using a custom-built file created specifically for this vehicle by our trusted calibration partners at Viezu. This isn’t an off-the-shelf tune—each map is tailored to the engine, ECU, and driving

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Audi A5 V6 undergoing EGR delete with professional ECU tuning equipment.

Audi A5 3.0D V6 Stage 1 Remap & EGR Delete – Four Lanes, Cornwall

At Kernowsport, we don’t see many Audi A5s, but today’s job in Four Lanes, Cornwall was a cracking example of the 3.0D V6 model. It was the second job on the estate this week—the previous one being a VW T5 Transporter—but this Audi was in beautiful condition with exceptionally low mileage for its year. If we were in the market ourselves, this would have been the perfect choice. Why the Audi Needed Attention The owner had gone to great lengths to find this vehicle but wanted it tuned for performance and reliability: With Audi diesels, this is usually a straightforward job. Most models are compatible with a simple OBD port connection, making it a quick and safe process. The Kernowsport Process Using professional diagnostic tools and ECU tuning software, we were able to: Within a short time, the Audi was ready for a test drive. The V6 engine responded beautifully, giving the owner a noticeable improvement in performance and drivability. Seeing that big smile after the test drive is exactly why we love our jobs at Kernowsport. Mobile ECU Remapping Across Cornwall Kernowsport provides mobile vehicle tuning and ECU remapping across Cornwall, including:Four Lanes, Camborne, Redruth, Hayle, Penzance, Truro, Helston,

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Volvo V60 diesel parked in Penponds near Camborne for remap by Kernowsport.

Volvo V60 Diesel Performance Remap in Penponds, Near Camborne

Job number two today took us to Penponds near Camborne for a Volvo V60 diesel remap. While we’ve worked on plenty of Volvos over the years, this was our first V60, and it proved to be a great example of why careful, professional ECU work matters. The owner wanted improved drivability and efficiency, and trusted Kernowsport to carry out the remap properly. Why a Bench Read Was the Right Choice for This V60 On the Volvo V60, the ECU is positioned beneath the windscreen scuttle, meaning some trim needs to be removed to access it. While OBD tuning via the diagnostic port is often the quickest route, in this case we opted for a bench read. A bench read allows us to: It takes a little longer, but it’s the safest and most thorough approach, especially on vehicles where ECU access isn’t straightforward. A Relaxed Job With Great Results With the ECU safely read and written, the remap itself went smoothly. Volvo diesels respond well to tuning, delivering: Add in an hour of conversation about all things aviation, and before we knew it the job was complete and the V60 was back on the road. More Than Just a Remap

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BMW 320d parked in hayle Cornwall ready for Stage 1 remap by Kernowsport.

BMW 320d Stage 1 Performance Remap – Mobile Tuning in Cornwall

The first of three jobs today was this tidy BMW 320d, booked in for a Stage 1 performance remap. BMW diesels are always a pleasure to work on, offering excellent gains with minimal fuss when done correctly. This particular car had been stood for a while, and with the recent cold weather, the battery had gone flat—something that needs careful attention before any ECU work begins. Why Stable Voltage Is Critical During ECU Remapping When reading from or writing to an ECU, stable voltage is absolutely essential. Low or fluctuating voltage can cause interruptions, failed writes, or even ECU damage. At Kernowsport, we use a professional-grade battery conditioner specifically designed for ECU programming. These units aren’t cheap, but they are a vital part of doing the job properly and safely. It’s small details like this—often unseen—that separate a professional remap from a risky one. Quick BMW Remap, Big Gains Once the battery was fully stabilised, the remap itself was a straightforward and efficient process, as BMWs usually are. After the Stage 1 tune, this 320d was producing around 230bhp, delivering: Best of all, the owner was back on the road before the ASDA delivery arrived—which is always a win! Why

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Ford Transit 2.2D tipper in Southampton during mobile remap by Kernowsport.

Ford Transit 2.2D Tipper Remap & Speed Limiter Removal – A Sunday Call-Out

This Sunday job was an unexpected one—but also one of the most enjoyable we’ve done in a while. Back in the summer, Kernowsport attended a VW Transporter that had gone into limp mode on a holiday park in St Austell. We worked a little magic, got the van running properly again, and helped the customer make it home without further issues. Fast forward a few months, and that same customer got back in touch—this time with a rather bigger request. From Cornwall to Southampton… On a Sunday The customer had since bought a Ford Transit 2.2D tipper and wanted two things done before work on Monday morning: The catch?The vehicle was in Southampton. We explained that it was a fair distance from Hayle, Cornwall—and on a Sunday, no less—but the customer was adamant. He specifically wanted Kernowsport to do the job, based on his previous experience with us. After agreeing a price, we loaded up and headed off. Transit 2.2D – Tuned and Ready for Work The Ford Transit 2.2D is a solid platform for tuning, especially when used as a working tipper. A well-written remap delivers: Removing the speed limiter was the final touch—ensuring the van was fully ready

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VW Transporter T6 BiTDI parked in Relubbus for EGR valve repair by Kernowsport.

VW Transporter T6 EGR Valve Repair in Relubbus, Cornwall

The first job of the day took us just down the road to Relubbus, a trip that brought back a few childhood memories—and gave us the chance to work on a truly lovely 2017 VW Transporter T6 BiTDI with just 40,000 miles on the clock. The owner was experiencing an EGR valve issue, and with an upcoming busy period ahead, wanted it resolved quickly and properly. That’s where Kernowsport stepped in. A Standout Transporter T6 in a Rare Specification We work on a lot of VW Transporters—often five or more per week—but this one was right up there with the best. This particular T6 came in a rare all-seat configuration with twin sliding doors, powered by the 204bhp BiTDI engine and paired with a 6-speed gearbox. Even in standard form, it’s an impressively quick and capable van—perfect for both work and family use. Quick, Effective EGR Diagnostics & Repair As expected with the Transporter platform, this was a straightforward and efficient job for us. We quickly diagnosed the EGR fault, resolved the issue, and ensured everything was operating as it should—no warning lights, no drivability problems, and no compromises. Reliable diagnostics and correct fixes are key on modern VW vans,

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Fiat 500 at Lockley Contracting in Mount Hawke for DPF delete by Kernowsport.

Fiat 500 DPF Delete for Lockley Contracting in Mount Hawke

We were back over at Lockley Contracting in Mount Hawke today for another job—and interestingly, this was the third Fiat 500 we’ve worked on this week. Some weeks we seem to get a run of the same models, and the Fiat 500 is certainly a familiar sight for us at Kernowsport. This particular vehicle was booked in for a DPF delete, with the physical work handled by the team at Lockley Contracting and the software side completed by Kernowsport. Trusted DPF Work – Hardware & Software Done Right DPF work isn’t something many garages are keen to take on—it’s messy, time-consuming, and often avoided altogether. That’s why it’s great to work with specialists like Oliver and Thomas at Lockley Contracting, who are happy to: All without fuss and at very competitive prices. Once the hardware side was complete, we dropped in to carry out the DPF delete software, ensuring the ECU was correctly configured and free from fault codes. Quick Turnaround, Real-World Results As expected, this Fiat 500 was a quick and straightforward job. Within a short time, the vehicle was: The owner relies on the car for a daily commute from Penzance to Treliske, so minimising downtime was essential.

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BMW 1 Series diesel parked in Lanner near Redruth before remap by Kernowsport.

BMW 1 Series Diesel Remap, DPF & EGR Delete in Lanner, Near Redruth

We seem to have worked on a lot of BMW 1 Series diesels recently, and this visit to Lanner, near Redruth, was another great example of why they remain such a popular choice for tuning. The owner had already completed the physical DPF and EGR removal himself and called on Kernowsport to take care of the software side, along with a Stage 1 performance remap to bring everything together properly. An Early BMW 1 Series – And One of the Cleanest We’ve Seen This particular car was a 2004 model, making it one of the earliest BMW 1 Series diesels on the road. Despite its age, it was also one of the cleanest examples we’ve seen for the year—clearly well looked after and a real bargain for the owner. With the right tuning and software corrections, cars like this can continue to offer reliable, economical motoring for years to come. Why BMW 2.0D Engines Are Fantastic Value to Tune BMW’s 2.0D diesel engines are among the best “bang for buck” engines we work on here at Kernowsport. Depending on the year and specification, a Stage 1 remap can typically take these engines from: That means: It’s hard to find another

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