Buses & Coaches AdBlue (SCR), NOx Sensor & DPF Removal Emulators
When an SCR, NOx sensor or DPF fault puts your bus or coach into limp mode, our plug-in emulator devices restore normal operation without delay. Covering Volvo, Temsa and Setra vehicles across Euro 5 and Euro 6 standards, every unit ships with the vehicle-specific wiring harness your workshop needs. 21 products.
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What Is a Bus & Coach Emission Removal Emulator?
Modern buses and coaches are equipped with AdBlue (SCR) systems, diesel particulate filters (DPF) and NOx sensors to meet Euro 5 and Euro 6 emission standards. When any of these components fails or degrades, the engine control unit (ECU) responds with limp mode, persistent warning lights and a flood of DTC fault codes — taking the vehicle off the road and disrupting schedules. A plug-in emission removal emulator is a compact electronic device that generates the correct CAN-bus signals the ECU expects from the affected component, allowing the vehicle to run normally while the underlying hardware issue is addressed or replaced.
Supported Bus & Coach Makes and Models
Our Buses & Coaches category includes purpose-built emulator devices for Volvo B8R, Temsa Maraton (EAS3 and EAS4 generations), Temsa Safir, and Setra buses across multiple build periods — including Setra Euro 5, Setra Euro 6 and Setra Euro 6.2 variants. Each product is matched to a specific chassis and ECU type, and ships with a vehicle-matched wiring loom so installation can be completed quickly by a competent emission workshop or auto-electrician.
Emission Systems Covered
- AdBlue (SCR) Removal Emulator: Generates the valid sensor signals the ECU expects from the AdBlue (DEF) dosing system and SCR catalyst, eliminating faults caused by a failed injector, pump, or catalyst without triggering limp mode.
- NOx Sensor Emulator: Simulates the voltage and frequency values expected from upstream and downstream NOx sensors, preventing limp mode and fault codes such as P20EE and P2201 that are common on Euro 6 buses.
- DPF Removal Emulator: Neutralises stop-protection errors caused by a blocked diesel particulate filter or a failed differential pressure sensor, keeping the vehicle in full power mode.
- DTC Fault Code Eraser: Permanently clears stored and pending DTC records across Euro 5 and Euro 6.2 systems, extinguishing warning lights and resetting MIL indicators after repairs are complete.
Choosing the Right Emulator for Your Bus or Coach
- Check the Euro Standard: Confirm the emission norm on the vehicle's registration document — Euro 5, Euro 6 or Euro 6.2. An emulator matched to the wrong standard will cause ECU communication errors.
- Match the Model and Chassis Generation: The Temsa Maraton EAS3 and EAS4 use different ECU protocols and wiring layouts; always cross-reference the product title with your vehicle's chassis generation.
- Identify All Faulty Systems: If both AdBlue and DPF faults are active, a combined AdBlue SCR + DPF Removal Emulator resolves both systems in a single installation, saving labour time.
- Read Fault Codes First: Scan active DTCs with an OBD diagnostic tool before ordering. Sharing the fault code list with our technical support team ensures you receive the precisely matched emulator.
Ordering, Dispatch and Warranty
All bus and coach emulators held in stock are dispatched the same business day. Every device is covered against manufacturing defects, and our technical support team — available via live chat and WhatsApp — provides step-by-step installation guidance if needed. Vehicle-specific wiring harnesses are included with each product, so no additional adapters or converters are required for Setra, Volvo or Temsa installations.
Frequently Asked Questions
Will fitting a Volvo B8R Euro 6 AdBlue removal emulator clear the limp mode permanently?
Yes. The Volvo B8R Euro 6 AdBlue (SCR) Removal Emulator reproduces the NOx and DEF (AdBlue) sensor signals the ECU requires. Once installed correctly, limp mode is deactivated and the associated DTC fault codes are cleared permanently. If multiple systems are at fault — for example, both the NOx sensor and the AdBlue system — a combined emulator device should be selected.
Can the same emulator be used for a Temsa Maraton EAS3 and an EAS4?
No. The EAS3 and EAS4 generations use different ECU firmware and wiring architectures, so they require separate, model-specific emulator devices. We list individual products for each generation. Before ordering, verify your vehicle's generation using the chassis number to avoid compatibility issues.
How quickly does a Setra Euro 6.2 DTC Fault Code Eraser work?
The Setra Euro 6.2 DTC Fault Code Eraser connects via the OBD port and clears active and stored fault codes within minutes. For a lasting result, the root-cause hardware fault should be resolved at the same time — typically by fitting the appropriate removal emulator — so the codes do not return.
Can a bus owner install the emulator without a workshop?
Our emulator devices are designed on a plug-and-play principle and ship with detailed wiring diagrams. However, because bus and coach emission systems vary considerably by model and generation, installation by a qualified emission workshop or experienced auto-electrician is strongly recommended. Our technical support team is available to assist throughout the process.
Does fitting an emulator affect the vehicle's periodic roadworthiness or emissions test?
Emulator devices regulate ECU sensor communication and fault code status — they are not designed to alter exhaust gas composition readings taken during a smoke or tailpipe emissions test. Roadworthiness inspection procedures and emissions test criteria vary by country and jurisdiction, so we recommend checking local regulations before use.
What are the dispatch and returns conditions?
In-stock items are dispatched the same business day whenever possible. If you are not satisfied with the product or a hardware defect is identified, please contact our customer support team to arrange a return or exchange. Full details are provided at checkout.
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