Two routes: repair the system, or disable it in software

When an AdBlue system starts playing up, you usually have two options:

• Repair: replace failed parts so the system runs as designed
• Delete: disable AdBlue and SCR logic inside the ECU with software-only changes

A key point before we go further: iFixAdBlue does not replace AdBlue parts or carry out hardware repairs. We provide software-only AdBlue deletes and related system resets where suitable. If you want to keep the system working as factory, you’ll need a garage or dealer to handle parts and fitting.

What an AdBlue repair looks like

A repair aims to restore the SCR and AdBlue system back to factory operation. In most cases, that means fault-finding, then replacing one or more components.

Typical repair steps

1. Diagnostic scan: a technician reads fault codes and live data to narrow down the cause.
2. Testing: the system gets checked for sensor readings, pressure behaviour, and dosing conditions.
3. Parts replacement: one or more components may be replaced to restore normal readings.
4. Reset and verification: faults are cleared and the vehicle is re-tested.

Common repair targets

• NOx sensors and sensor wiring issues
• AdBlue tank level and quality readings
• AdBlue pump and pressure faults
• SCR efficiency readings and related control issues

Costs vary by vehicle and diagnosis, but many owners see bills in the hundreds, and sometimes over a thousand, once parts and labour stack up. Time also varies. If parts are not in stock, a “one-day job” can turn into days off the road.

Repairs can be the right move when the van is newer, you want to keep factory emissions systems active, and you’re happy to maintain it long term.

Why repairs can turn into repeat visits

The AdBlue and SCR system relies on multiple sensors and control checks working together. If one reading goes out of range, the ECU can trigger warnings, reduce power, or start a countdown.

The tricky part is that replacing a single component does not always stop the pattern. A van can show the same warning again if another reading drifts later, or if the underlying control logic still sees a condition it doesn’t like.

That’s why many owners only start looking at a delete after:

• the warning returns after a repair
• a no-start countdown keeps coming back
• the van loses time and money through downtime
• the repair cost no longer makes sense for the vehicle

How an AdBlue delete works

An AdBlue delete disables AdBlue and SCR system functions in the ECU software. It removes the triggers that cause AdBlue warnings, limp mode, and no-start countdowns.

This is a software-only process. We do not cut, drill, remove parts, or physically modify your vehicle.

Typical delete steps

1. Initial checks: we confirm the vehicle is suitable and identify any related fault behaviour.
2. ECU read: we read the ECU file using professional tools.
3. Software change: we apply the correct AdBlue delete solution for your ECU type.
4. Write back and clear faults: we write the updated file and clear relevant warnings.
5. Road-ready check: we confirm the warning has gone and the vehicle drives as expected.

Most jobs take under an hour on site. Pricing depends on the vehicle and ECU type, but many deletes sit in a lower range than repeat repair cycles.

If you want the service details, see our AdBlue Delete service page. If you’re dealing with a countdown, see No-Start Countdown help.

Delete vs repair: what matters most for most van owners

When repair makes sense

Repair tends to suit you if:

• you want to keep factory emissions systems active
• the van is newer and you plan to run it long term
• you’re happy to maintain the system as components age
• you’ve had one clear fault and it has not returned

When a delete makes sense

A delete often suits you if:

• faults keep returning after repairs
• you’ve had repeated warnings and lost time off the road
• a no-start countdown keeps coming back
• repair costs no longer feel worth it
• you need a dependable work van and downtime hurts

We see this a lot with working vans where reliability matters more than chasing the next part swap.

Real-world examples we see

A common pattern is a van that has had one or more parts replaced, then the warning returns weeks later. The owner ends up stuck in the same loop: warning, reset, warning, garage visit, repeat.

We also see vans that trigger warnings after NOx sensor readings drift or the SCR system flags efficiency issues. In these cases, a software-only delete removes the AdBlue/SCR triggers so the van can get back to work without the same countdown cycle.

Questions to ask yourself before you decide

• Do I want to keep factory emissions systems active?
• How much downtime can I afford this month?
• Have faults returned after a previous repair?
• Am I paying for repeat visits, resets, and parts?
• Do I want a one-visit, software-only solution?