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ADBLUE OFF

We are a professional ECU tuning file provider and offer a specialized service for AdBlue/SCR system modifications. This document provides technical insight useful to automotive engineers and mechanics, who are experts in engine tuning and emission regulations.

adblue off

AdBlue Delete: Unleash Power, Less Maintenance, Save More!

AdBlue delete is the process of disabling or removing the AdBlue system in diesel vehicles, which is designed to reduce nitrogen oxide emissions. The system functions by adding AdBlue, a liquid solution, into the exhaust stream to transform harmful nitrogen oxides into safe nitrogen and water. 

Some vehicle owners opt for AdBlue deletion to increase fuel efficiency or avoid the cost of purchasing AdBlue fluid. This is typically done using electronic tuning devices or software that turns off the system.

While it may offer some benefits, tampering with emissions systems can have severe environmental and legal consequences.


ADBLUE OFF PROCESS

There are several critical steps involved in modifying the AdBlue system:

Diagnostic Assessment

  • Analyze the system with OEM-level tools and perform complete diagnostics.
  • Evaluate AdBlue system performance 
  • Check and record active fault codes. 
  • Check the status of critical components (NOx sensors, adblue tank and injectors)
  • Check the status of the AdBlue counter and reset its capacity. 
  • The AdBlue counter needs to be reset, and the AdBlue tank needs to be filled.

ECU Data Extraction

  • The ECU data should be read out of the engine control module.
  • Delete data from the treatment module (DCU) if present.
  • Make sure data capture is complete for both modules.
  • Read all software (usually in the boot or bench) for reliable deletion of AdBlue tasks.
  • Use throne or boot mode for more reliable operation of the customization tool. (Guaranteed checksum calculation for all maps)

File Upload and Analysis Process

·        First-time customers must register on the website and purchase credits before uploading.

·        Upload of extracted files by customer to secure portal

·        Provides detailed system status reports, including:

1.     AdBlue system performance

2.     Counter reset position

3.     Component failure (e.g. NOx sensor, tank integrity)

4.     Active fault code

File Modification Process

  • The uploaded data is analyzed by our engineers.
  • Apply custom modifications to your vehicle's specific needs.
  • Change the map and specific parameters to bypass the AdBlue system.

File Delivery Process

  • The converted file will be uploaded to the customer portal.
  • Typical processing time: <20 minutes for standard AdBlue blocking.
  • Complex case: The connection file (or connection file) will be processed within a maximum of 1 hour.

Implementation and Testing

  • The modified file was flashed to ECU by the customer
  • Upon the engineer's request, unplug the connectors (SCR unit, tank plug, SCR fuse, NOX sensor) (the batteries should be disconnected 20 minutes before removing the SCR unit).
  • Extensive testing of the system was performed.
  • Verify that the AdBlue system is bypassed without errors.
  • Check the maximum performance of the engine.

Support and Refinement

  • Our website provides ongoing technical support.
  • Diagnostic trouble codes should be explained before making pro assistance requests or providing the issue clients are facing. 
  • Post-modification issues are addressed promptly by engineers
  • Additional improvements are made based on real-world performance as needed.

Changes to Key Maps and Parameters AdBlue Off Process

AdBlue removal typically involves modifying the following maps and parameters:

1.     NOx Sensor Map: Set it to zero or bypass to prevent detecting high NOx levels. 

2.     AdBlue Injection Map: Set it to zero to stop the AdBlue injection. 

3.     Diagnostic Trouble Code (DTC) Map: Disables AdBlue-related fault codes. 

4.     SCR System Map: Change the AdBlue pump and injector operation to turn off. 

5.     Temperature Map: Adjust or skip to resolve temperature-related issues. 

6.     Emergency mode map: Disabled due to AdBlue error to ensure regular vehicle operation

7.     Error Map: AdBlue system errors are now ignored.

Considerations for Technical Options

  • ECU Compatibility: Hardware and software modifications tailored to specific ECU versions
  • Emissions Compliance: Striking to maintain acceptable emissions levels through accurate ECU calibration.
  • Performance enhancement: Often combined with performance tuning to increase engine power.
  • Legal Implications: Clients are advised of potential legal issues.
  • Checksum Calculation: Ensure proper checksums on all edited maps. 
  • AdBlue Counter Reset: It is important to reset before changing software. 
  • System Integrity: It is recommended that system integrity be maintained by unplugging only the necessary sensors.

LATEST DEVELOPMENTS IN ADBLUE REMOVAL 

Here are some examples of recent innovations:

  • Combining start-off or inversion with AdBlue off
  • AdBlue dosage limit: Reduce the amount of AdBlue injected by 50-80%.

Every file is optimized for a specific vehicle and engine control unit configuration while maintaining the optimal operational characteristics of the car. This is done using a compliant Adblue file the team of calibration engineers explicitly designed for the task. We stress the importance of using proper diagnostic software and clean techniques to read the ECU for successful modifications. Customers must understand that this may have an impact on their warranty claims. According to local regulations and enforcement practices, vehicles may need to be inspected or analyzed for emissions. Many tuning tools have the option of keeping the original CVN, but this is a complex process and is only successful with some types of ECUs and modifications.

 

scr off

 

ADBLUE OFF (FAQs)

How does AdBlue removal affect SCR system durability?

Not employing AdBlue may build up thermal strain on the SCR catalyst. This results in an increased concentration of NOx, which might hasten the catalytic converter's deterioration over time.

What are the effects of modifying NOx sensor maps?

NOx sensor maps that are modified disrupt the closed-loop feedback system for emissions control. Maintaining acceptable NOx levels without using AdBlue injection requires careful adjustment of the fuel injection timing and EGR rate.

Do AdBlue removals impact OBD-II compliance and emission tests?

Removing AdBlue generally results in non-OBD-II compliance and failure of most local emissions tests. Depending on your location, a complex OBD simulator may be required to simulate normal system operation. However, it remains a legal gray area.

What can be done to prevent secondary fault codes after AdBlue is removed?

Dealing with secondary fault codes requires extensive modification of interconnected parameters. This includes disabling specific diagnostic routines, threshold adjustment, and sometimes using custom code to simulate normal system behavior.

How are optimal EGR rates maintained after AdBlue removal?

To reduce NOx emissions, the rate of EGR has to be increased. This requires modifying EGR maps, changing the timing of the valves, and possibly replacing the EGR cooler for greater exhaust flow.

How is DPF regeneration affected by AdBlue removal?

DPF rejuvenation rounds may have to be stepped up due to the possibility of increasing particle concentration. Occasionally, we adjust the DPF regeneration temperature and time to replace the AdBlue-dependent regeneration.

How can multi-stage injection systems be used to remove AdBlue?

Multi-stage injection complicates AdBlue disposal because it is often integrated into emissions controls. We can carefully adjust each injection event to maintain efficiency by reducing NOx generation without using AdBlue.

How are exhaust gas temperature changes addressed after AdBlue removal?

The temperature of exhaust may rise if AdBlue is not injected. We change the timing sequence and fuel injection quantity diagram to control the exhaust temperature, which sometimes has to be exchanged for reducing power.

How should vehicles with dual SCR catalysts be treated?

Dual SCR systems require more complex adjustments. Both pre-and post-turbo catalysts need to be fixed, and this often involves separate temperature management strategies for each catalyst phase.

What are the legal ramifications of AdBlue removal?

Road use of AdBlue is prohibited in many jurisdictions. Although regulations vary widely, we must inform our customers that you can use this product for off-road or racing applications in some markets.

How is fuel economy and performance maintained after AdBlue removal?

Adjusting injection timing, pressure, and quantity is key to fuel economy, with any power gain from reduced back pressure needing to be balanced against possible higher fuel use.

How should variable geometry turbochargers be adjusted after AdBlue is removed?

Optimizing exhaust flow and boost pressure often requires recalibration of VGT maps. This involves adjusting the blade position map to the modified injection EGR strategy.

How is system reactivation prevented after AdBlue removal?

This may require permanently disabling ECU functions and making hardware changes. Some clients use software locks to prevent dealer tools from reactivating them.

Can limp mode be removed after AdBlue system modification?

Although in some cases we can disable Limp mode, it is not advisable. We prefer to fix the root cause rather than eliminate the symptom.

What challenges arise with hybrid diesel-electric powertrains during AdBlue removal?

These systems require careful balancing of the diesel engine's operation with the help of the electric motor. Adjusting energy management strategies and regenerative braking measures may be necessary to compensate for changes in the diesel engine's exhaust emissions profile.

When AdBlue is removed, how does exhaust back pressure affect the engine?

Removing AdBlue injection can slightly reduce exhaust back pressure. For engines with variable valve timing, the cam timing map may need to be adjusted to accommodate exhaust drive under new conditions.

How does AdBlue removal affect emission test readiness?

Removing AdBlue may affect readiness for emissions testing, causing the readiness results to fail. We can set the readiness flag to always be displayed on some ECU types.

Are vehicle diagnostics able to detect AdBlue removal modifications

Yes, programming modifications can be detected using the vehicle's Calibration Verification Number (CVN). CVN is a verification value calculated from the ECU's measurement data when changes are made to the ECU software, including changes related to the AdBlue CVN exhaust pipe change. This means that even though the AdBlue system is operating normally.

 

What are the most common fault codes related to AdBlue and NOx problems?

 

AdBlue System Codes:

•P20EE: SCR NOx is below the catalytic efficiency limit.

•P204F: Reductant system performance

•P203F: Reduction level too low

•P2047: Reductant injector circuit open

•P2048: Injector reductant communication circuit

•P2049: Reductant Injector Circuit High

•P20E8: Pressure reduction too low

•P20E9: Pressure reduction is too high.

 

AdBlue Quality Sensor Codes:

•P20FC: Reductant quality sensor circuit 

•P20FD: Range/Display of Reductant Quality Sensor Circuit 

•P20FE: Reductant quality sensor circuit low. 

•P20FF: High-quality reductant sensor circuit.

 

AdBlue Tank and Level Sensor Codes:

•P202E: Reductant tank temperature sensor circuit

•P202F: Reductant tank temperature sensor circuit/display

•P2043: Reductant tank temperature sensor circuit low

•P2044: Reductant tank temperature sensor circuit high

•P205A: Reductant tank level sensor circuit

•P205B: Reductant tank level sensor/display circuit

•P205C: Low Reductant Tank Level Sensor Circuit

•P205D: The reductant tank level sensor circuit is high.

•U010E: Lost Communication With Reductant Control Module 

 

AdBlue Heater Codes:

•P20B9: The reductant heater control circuit is open.

•P20BA: The reductant heater control circuit is low.

•P20BB: Reductant heater control circuit high.

•P20BC: Reductant heater temperature sensor circuit.

•P20BD: Reductant Heater Temperature Sensor Circuit Range/Display.

 

NOx Sensor Codes (related to AdBlue system efficiency):

•P220A: NOx Sensor Circuit Bank 1 Sensor 1 

•P220B: NOx Sensor Circuit Low Bank 1 Sensor 1 

•P220C: NOx Sensor Circuit High Bank 1 Sensor 1 

•P229F: NOx sensor is located in Bank 1 Sensor 1 of the Heater Control Circuit.

•U029D: Lost Communication With NOx Sensor

•U029E: Lost Communication With NOx Sensor

•P2201:  NOx Sensor Circuit Range/Performance Bank 1

•P2202: NOx Sensor Circuit Low Bank 1

•P2209: NOx Sensor Heater Sense Circuit Range/Performance Bank 1

•P220E: NOx Sensor Heater Control Circuit Range/Performance, Bank 1 Sensor 1

•P220F: NOx Sensor Heater Control Circuit Range/Performance, Bank 1 Sensor 2

•P225F: NOx Sensor Performance - Signal Biased/Stuck Low Bank 1 Sensor 2

•P2BA9: NOx Exceedence - Insufficient Reductant Quality

•P2BA7: NOx Exceedence - Empty Reductant Tank

•P2BAB: NOx Exceedence - Incorrect EGR Flow

•P2BAC: NOx Exceedence - Deactivation of EGR 

•P2BAD: NOx Exceedence – Root Cause Unknown

 

AdBlue Pump Codes:

•P20F8: Reductant Pump Control Circuit

•P20F8: Control Range / Capacity of Reductant Pump Control Circuit

•P20FA: Reductant Pump Control Circuit Low

•P20FB: Reductant Pump Control Circuit High

 

SCR System Codes:

•P249D: Closed loop reductant injection control at the limit—flow is too high.

•P249E: Closed loop reductant injection control at the limit—flow is too low.

 

If you have further questions about AdBlue and NOx problems, do not hesitate to ask us

(Note: Removing the AdBlue system may void your vehicle's warranty and cause environmental damage. Therefore, you should carefully consider all risks and legal implications before performing this operation.)