Frequently Asked Questions

ECU remapping is a software optimisation of your vehicle’s engine control unit. It improves how the engine delivers power, torque, and efficiency by refining manufacturer safety margins. Stage 1 requires no hardware changes.

Yes — when done correctly. We apply custom, vehicle-specific calibrations that stay within safe engine and gearbox tolerances. We do not use generic “one-file-fits-all” maps.

Most vehicles take 60–90 minutes in total, including diagnostics, file reading, calibration and final checks. Some ECUs may take longer depending on access method and vehicle condition.

Yes. Northern Calibration is fully mobile across Cumbria, the Borders and wider Northern regions. We come to your home or workplace — no garage visits, no waiting rooms.

We cover Cumbria and the Borders, plus wider Northern coverage including the North East, North West and Scotland depending on the job.

If you’re unsure, contact us with your postcode and we’ll confirm availability.

Yes. We scan for faults and check key live data before any tuning. If there’s an underlying issue (boost control, airflow, fuel pressure, DPF load or sensors), tuning first becomes guesswork — and we don’t do guesswork.

Often yes. Limp mode is a protection strategy triggered by a fault (boost control, airflow, fuel pressure, emissions systems or sensors). We diagnose the cause first and then advise the best route before any calibration work is carried out.

A full scan, code interpretation, key live data checks, and clear next steps. If deeper testing is needed, we explain why and what options make sense — no vague guessing.

In many cases, yes. An eco or torque-optimised calibration can improve fuel efficiency when driven sensibly, especially on diesel vehicles used for motorway or long-distance driving.

Absolutely. We offer:

• Stage 1 performance remaps
• Eco remaps
• Balanced setups combining power, torque and drivability

We’ll discuss how you use the vehicle and tune accordingly.

Yes. Stage 2 and Stage 3 are consultation-led services because results depend on supporting hardware, ECU strategy and drivetrain limits. We confirm your setup first and advise the safest route.

Yes. That’s exactly what Stage 1+ and Stage 2 are for. We tailor the calibration to suit the setup so it drives properly and stays within safe limits.

You should inform your insurer of any performance modification. Many insurers accept ECU remaps, and some charge little or no increase. It’s always best to declare it.

Yes. A standard Stage 1 or eco remap does not affect MOT compliance.

For vehicles with DPF, EGR, or AdBlue issues, legality depends on how the vehicle is used and applicable regulations. We’ll explain the implications clearly before any work.

Yes. We provide diagnostics-led support for DPF, EGR and SCR/AdBlue systems where appropriate. We assess fault codes, live data and vehicle condition before advising.

Frequent regens are usually a symptom. Common causes include short-trip driving, boost/air leaks, EGR faults, sensor issues, injector problems, or excessive soot production. We check soot/load values and differential pressure first.

Where appropriate, yes — but only after checks. A forced regen on the wrong vehicle condition can cause damage. We verify it’s safe before attempting it.

Common symptoms include an emissions warning, reduced power, a countdown to no-start, and recurring NOx/SCR fault codes. Causes can include NOx sensors, pump pressure issues, dosing/injector faults, wiring or module faults — so diagnosis matters.

Yes, many SCR systems trigger a no-start countdown if certain faults remain unresolved. If you have a countdown active, message us the exact warning and codes ASAP.

Yes. We remap manual and automatic vehicles, including DSG and other modern gearboxes. Gearbox software upgrades may be recommended on higher-torque vehicles.

Where supported, yes. Gearbox software can improve shift strategy and torque handling, especially on higher-torque builds. We’ll advise if it’s worthwhile for your vehicle and goals.

Yes. Your original software is backed up and can be restored if required.

A remap may affect manufacturer warranty. If your vehicle is under warranty, let us know and we’ll advise honestly on your options.

We support most petrol and diesel vehicles, including:

• Cars
• Vans
• 4x4s
• Performance models

If you’re unsure, contact us with your registration number and we’ll check compatibility.

Where practical, we can review key live data and confirm requested targets are being met safely. Exact gains vary by vehicle, condition and modifications — we focus on safe, repeatable performance and drivability.

Prices vary depending on vehicle, ECU type, and service required. You’ll always receive a clear price upfront — no hidden charges. Stage 2 and Stage 3 require a brief consultation to confirm hardware and goals.

Yes. We offer flexible payment options on selected services. Details are provided during booking.

• Mobile service across Cumbria, the Borders & Northern regions
• Custom, vehicle-specific tuning (no generic files)
• Diagnostics-first approach
• Consultation-led Stage 2/3 builds
• Operated by Precision Remaps UK

You can book directly online or contact us to discuss your vehicle first. For Stage 2/3, include your modifications list and goals so we can advise the correct route before scheduling.