01
AdBlue System Fault Diagnosis
We scan the full AdBlue system - including level sensors, quality sensors, and dosing injectors - to pinpoint the source of fault codes and warnings.
AdBlue / SCR Assistance
AdBlue errors and SCR system faults can put your vehicle into limp mode fast - we diagnose and resolve them before they stop you driving.
What We Do
Expert AdBlue and SCR diagnosis to keep you on the road.
Modern diesel vehicles fitted with Selective Catalytic Reduction systems are highly sensitive to AdBlue quality, sensor faults, and NOx performance issues. Warning lights, limp mode, and countdown-to-no-start messages are all common symptoms of SCR system problems - and they can escalate quickly.
At Tune It Scotland, we use professional diagnostic tools to accurately identify whether the issue lies with the AdBlue system, NOx sensors, SCR catalyst, or the associated software - and carry out the right fix to get you moving again and prevent the problem from recurring.
Services Offered
Comprehensive diagnosis and resolution for AdBlue and SCR faults
From NOx sensor failures to AdBlue quality issues, we cover the full SCR system to identify the root cause and resolve it correctly.
02
NOx Sensor Testing
We test upstream and downstream NOx sensors to identify failures or incorrect readings that trigger SCR system warnings and limp mode.
03
SCR Catalyst Assessment
We assess SCR catalyst performance through live NOx efficiency data to identify degraded or failing catalysts.
04
AdBlue Dosing System Check
We verify correct AdBlue dosing injector operation - checking for blockages, failures, or incorrect delivery affecting NOx conversion.
05
Limp Mode Investigation & Resolution
Where the vehicle has entered limp mode due to SCR faults, we carry out structured diagnosis to identify and resolve the trigger cause.
How We Work
Accurate diagnosis before your countdown reaches zero.
SCR and AdBlue faults can escalate into a no-start condition if left unresolved. Our structured process identifies the fault early and resolves it correctly.
01
Diagnose
Full AdBlue and SCR system scan with live data - reading NOx values, dosing rates, sensor states, and fault codes to build an accurate fault picture.
02
Identify
We isolate the specific fault - whether sensor, catalyst, dosing system, or software - and advise clearly on what needs to be done.
03
Resolve
We carry out the appropriate repair or calibration, working efficiently to get you back on the road before the situation worsens.
04
Clear & Verify
Post-repair system verification confirms correct SCR operation, fault codes are legitimately resolved, and the limp mode condition is cleared.
AdBlue warning or limp mode?
Act quickly - book an AdBlue / SCR diagnostic with Tune It Scotland today. Mobile and workshop appointments available.
Other Services
All Services
ECU Diagnostics
Warning lights and unexplained faults need more than a code reader - we use OEM-level tools and real expertise to find what is actually wrong.
- Full System ECU Scan
- Live Data Analysis
- Sensor Testing & Fault Tracing
- Injector & Fuelling Diagnostics
Vehicle Diagnostics
Fast, accurate fault finding for any warning light, performance issue, or unexplained problem - using professional tools, not guesswork.
- Multi-System Fault Code Scan
- Live Data Capture & Interpretation
- Warning Light Investigation
- Pre-MOT Diagnostic Check
Servicing & Repairs
Reliable, thorough servicing and repairs carried out by people who genuinely care about your vehicle - done right, every time.
- Engine Oil & Filter Service
- Air, Fuel & Cabin Filter Replacement
- Brake Inspection & Replacement
- Cooling System Service
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