Mercedes C-Class NOX Sensor Issue Resolved Without Replacement | Saving £650!
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- เผยแพร่เมื่อ 9 ก.ค. 2024
- Mercedes C-Class 2017 NOX Sensor Issue Resolved Without Replacement | Saving £650 Just Clean Adblue Injector And Adblue Injector Hole
Welcome back to our TH-cam channel! Today, we have an interesting and cost-saving story to share with you about a Mercedes C-Class 2017 that had a persistent NOX sensor problem. This car owner went to several garages, spent over £1500, and was told that they needed to replace the NOX sensor 2, which would cost an additional £800. However, the customer decided to seek another opinion and ended up at our workshop.
Upon a thorough assessment of the Mercedes C-Class, we discovered two faulty error codes related to the NOX sensor 2:
P229F92 NOX SENSOR 2 (CYLINDER BANK 1) HAS A MALFUNCTION. THE FUNCTION OR THE INSTRUCTION IS FAULTY.
P220F77 THE HEATER OF NOX SENSOR 2( CYLINDER BANK 1) HAS AN ELECTRICAL FAULT.THE COMMANDED POSITION CAN NOT DE REACH
Instead of jumping straight into replacing the NOX sensor, we decided to take a different approach. We decided to perform a bit of experimentation to see if there might be an alternative solution to this problem. After all, saving money is always a good thing, right?
During our investigation, we made a crucial discovery - the Adblue injector and injector hole were blocked. This blockage was potentially causing the NOX sensor issues. Instead of immediately replacing the NOX sensor, we decided to tackle the root cause of the problem and set out to clean and reinstall the injector.
With the injector cleaned and reinstalled, we took the Mercedes C-Class for a motorway road test. Our goal was to allow the car to clean the Diesel Particulate Filter (DPF) on its own, without the use of any DPF chemical additives.
To our delight, as we drove on the motorway, the DPF soot load began to drop significantly. It went from a staggering 99% down to a mere 3%. This result was a clear indicator that our approach was working, and the car was doing the job on its own.
In the end, not only did we resolve the NOX sensor issue, but we also managed to save the customer a whopping £650 by avoiding the unnecessary replacement of the NOX sensor. We went the extra mile to ensure that the customer's Mercedes C-Class was back in great shape and running smoothly.
We believe in transparency and providing value to our customers. Our dedication to solving problems efficiently and cost-effectively is what sets us apart. We take pride in our work, and this happy car owner is a testament to our commitment.
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Another testament to your automobile ingenuity Charlie. Thanks for helping the community to be a better place for vehicle owners.
Thank you so much for your kind words! I'm glad this car has completed 570 miles and came to free assessment after repair, DPF system is working as it should. It's always rewarding to know that our efforts in the automotive industry are helping vehicle owners to have a better experience. If you have any more questions or need further assistance, feel free to reach out. Drive safely!
thank you
Just had identical problem with my C250D, dashboard said it can't read Adblu level and orange engine management light came on repeatedly even after a reset. OBD scanner reported downstream Nox and Adblu component faults. I'm sure had I taken it to Mercedes the bill would have been in excess of £1000 for parts and labour. Instead took it to specialist local garage who cleaned the adblu injector housing and then reset the adblu metering (you need a sophisticated scanner to do this) and all fixed. Total cost £65 (no parts required). Brilliant video- thanks
thanks for the comment, this repair bit expensive, however untill do the assessment im not sure what's going on, our assessment charges 120+ VAT
thanks
hello mate ,think I have a same problem. Where abouts are you from? I am in Manchester area.. asking for the garage and Sanu Motors is so far from me.
@@vilemkmec1576 we are at Bromley (Br13pe)
It’s ok. Also 2 coustomer came from your area
Good luck with the job
Not convenient for you i'm afraid, I'm in Kent, the place i went to was Leeds Auto Centre CT3 4GP.
@@sanumotorswithcharlie I will give you a call tomorrow and we can discuss it . Thank you
Great job done. I have similar issues with my GL 350 and change all 2 NOX sensors but still have the check engine light on . Also the adblue starts remaining 10
I'm sorry to hear that you're still experiencing issues with your Mercedes-Benz GL 350, even after changing both NOx sensors. If your check engine light is still on and you're getting an AdBlue warning with a remaining 10 count, there may be other underlying issues that need to be addressed. Here are some steps you can take to troubleshoot the problem:
Check for Error Codes: The first step is to retrieve the specific error codes stored in the vehicle's computer system. You can use an OBD-II scanner or take your vehicle to a mechanic or dealership to read the codes. These codes will provide more information about the exact issue.
Verify the NOx Sensors Installation: Ensure that the NOx sensors were installed correctly and that there are no loose connections or damaged wires. Sometimes, improper installation can cause issues.
Inspect the AdBlue System: The AdBlue warning indicates a problem with the diesel exhaust fluid (DEF) system. Check the AdBlue tank level, and if it's still at 10, it may need to be refilled. Also, check for any leaks or malfunctions in the AdBlue system components, such as the AdBlue pump or injector.
Reset the Error Codes: After addressing any issues found in steps 2 and 3, you can clear the error codes using an OBD-II scanner or by disconnecting the vehicle's battery for a few minutes. This will reset the check engine light.
Drive the Vehicle: Take the vehicle for a drive and see if the check engine light returns. It may take some time for the system to recognize that the issues have been resolved.
Monitor AdBlue Usage: Keep an eye on the AdBlue consumption over the next few miles. If it continues to decrease rapidly after refilling, there could be an issue with the AdBlue system, and it may require professional diagnosis and repair.
Professional Inspection: If the check engine light persists or if you continue to have AdBlue-related issues, it's advisable to have a professional mechanic or dealership technician inspect your vehicle. They have the tools and expertise to diagnose and address complex issues.
Remember that the check engine light can illuminate for various reasons, and it may not always be directly related to the NOx sensors or AdBlue system. Proper diagnostics are essential to pinpoint the exact cause of the problem and ensure that it is resolved correctly
Nice video, I'm glad you could save money for the customer.
I noticed the car has very low mileage, even though it's several years old. Do you think the SCR catalytic converter and injector have gotten clogged up because of constant shorter journeys? These modern diesel engines need longer journeys regularly, otherwise things get clogged up unfortunately.
It's possible that the low mileage on Mercedes C Class 220D could lead to issues with the SCR (Selective Catalytic Reduction) catalytic converter and injectors, especially if the car primarily undergoes shorter journeys. Diesel engines, especially modern ones with emissions control systems like SCR, tend to perform better and maintain their components more effectively during longer drives.
Here are some reasons why shorter journeys can potentially cause problems:
Incomplete Regeneration: Diesel particulate filters (DPF) and SCR systems require sufficient heat and driving time to undergo regeneration, which helps remove accumulated soot and prevent clogging. Short trips may not allow the engine to reach the required temperature for effective regeneration.
Carbon Buildup: Short journeys can lead to carbon buildup in the engine and exhaust system, which may affect the efficiency of the SCR catalyst and injectors.
AdBlue Usage: The SCR system relies on AdBlue (diesel exhaust fluid) to reduce NOx emissions. Short trips may not allow the system to use AdBlue effectively, potentially leading to issues with the SCR catalyst and injectors.
To mitigate these potential problems, it's a good idea to occasionally take your Mercedes C Class 220D on longer drives, especially if it primarily undergoes short trips. This will help the engine reach operating temperatures, facilitate regeneration processes, and maintain the health of the emissions control components.
Additionally, following the manufacturer's recommended maintenance schedule and using high-quality fuel and AdBlue can also help prevent issues related to clogging and component degradation in your diesel engine. If you notice any warning lights or performance issues, it's advisable to have the vehicle inspected by a qualified technician to address any potential concerns
great video. I have a mercedes c class w205 2015 year, c 250 diesel. I cleaned the adblue injector just like you. he turned on the check engine light. p220162 The NOx sensor (cylinder bank 1) has a malfunction. The Signal Cimparmision is Faulty. when I clear the error it is gone for 20-30 days or 50-60 kilometers and then it appears again. how do I know which sensor it is, upper or lower, what should I do?
It seems like you're experiencing a recurring issue with the NOx sensor on your Mercedes C-Class W205. Here's what you can do to troubleshoot and potentially resolve the problem:
Diagnostic Scan: If you haven't already, perform a comprehensive diagnostic scan using a professional OBD-II scanner or diagnostic tool. This will provide more detailed information about the fault code and may help pinpoint the exact issue with the NOx sensor.
Identify Sensor Location: The Mercedes C-Class W205 typically has two NOx sensors, one upstream (before the catalytic converter) and one downstream (after the catalytic converter). Based on the fault code description ("NOx sensor (cylinder bank 1)"), it indicates a problem with the sensor on cylinder bank 1.
Consult Service Manual: Refer to the service manual or technical documentation for your specific vehicle model. It should provide detailed information about the location of the NOx sensors and how to access them.
Inspect Sensors: Once you've identified the location of the sensors, visually inspect them for any signs of damage, corrosion, or loose connections. Pay particular attention to the wiring harness and connectors.
Swap Sensors (Optional): If you have access to a similar NOx sensor, you may consider swapping the sensors between cylinder banks (if applicable) to see if the fault code follows the sensor. This can help determine if the issue is with the sensor itself or another component.
Check Exhaust System: Inspect the exhaust system for any leaks or damage that could affect the operation of the NOx sensor. A faulty exhaust system can lead to inaccurate sensor readings.
Professional Assistance: If you're unable to diagnose or resolve the issue on your own, it's advisable to seek assistance from a qualified mechanic or Mercedes-Benz dealership. They will have the expertise and specialized equipment to diagnose and repair the NOx sensor system accurately.
Addressing the NOx sensor malfunction promptly is important to ensure proper emissions control and engine performance. Continuing to drive with a persistent fault code may lead to further complications or potential damage to other components.
Really interesting work. I have a BMW E90 2 litre petrol with NOX sensor faults from diagnostic scan. How do I force catalytic convertor regeneration without computer, before replacing sensor - does a motorway trip initiate this automatically? Should I try removing and cleaning the sensor in situ and then refit? Many thanks.
Forcing catalytic converter regeneration on a BMW E90 without using a computer is a bit more challenging, but it can often be accomplished through a specific driving cycle. Here are the steps you can take to try and initiate the regeneration process:
Initiating Catalytic Converter Regeneration
Motorway Drive:
Drive on the motorway or highway at a steady speed of around 60-70 mph (100-110 km/h).
Maintain this speed for at least 20-30 minutes. This helps in reaching the necessary temperature for the catalytic converter to initiate the regeneration process.
High RPM Driving:
Occasionally, drive the car at higher RPMs (around 3,000-4,000 RPM) for short bursts.
You can do this by shifting to a lower gear and maintaining higher RPMs for a few minutes at a time.
Avoid Short Trips:
Avoid short trips where the engine doesn't get a chance to reach its optimal operating temperature. The engine and catalytic converter need to be hot for regeneration to occur.
Cleaning the NOX Sensor
Before replacing the NOX sensor, you can try cleaning it. Here's how you can do it:
Locate the NOX Sensor:
The NOX sensor is usually located in the exhaust system, either before or after the catalytic converter.
Remove the Sensor:
Carefully remove the sensor using the appropriate tools. Be gentle to avoid damaging the sensor or the wiring.
Clean the Sensor:
Use a suitable cleaner, like a MAF (Mass Air Flow) sensor cleaner or electronic contact cleaner, to clean the sensor.
Spray the cleaner on the sensor element and let it dry completely.
Refit the Sensor:
Once the sensor is dry, refit it into the exhaust system and ensure it is properly secured.
Additional Tips
Check for Exhaust Leaks: Make sure there are no exhaust leaks as they can affect the efficiency of the catalytic converter and the accuracy of the NOX sensor readings.
Fuel Quality: Use high-quality fuel as poor-quality fuel can lead to deposits forming in the catalytic converter and on the sensors.
Regular Maintenance: Ensure that the vehicle is regularly serviced, including oil changes and air filter replacements, as these can affect the overall health of the engine and exhaust system.
Final Thoughts
If after these steps, the NOX sensor faults persist, it might be necessary to replace the sensor. Persistent faults can lead to increased emissions and potentially damage the catalytic converter if not addressed promptly. If you continue to experience issues, it might be worthwhile to consult with a professional mechanic to ensure proper diagnosis and repair.
@@sanumotorswithcharlie Thanks so much for all this detailed and prompt advice.
Your Welcome
Hi. Is there a need for specialized coding equipment after such a nox replacement?
Hi there! After replacing the NOx sensor in a Mercedes, specialized coding equipment might not be necessary. However, it's always a good idea to consult with a qualified mechanic or technician who has experience working on Mercedes vehicles to ensure everything is properly calibrated and functioning correctly after the replacement. They can provide you with the best advice based on your specific vehicle and situation. Hope this helps!
I had issue with downstream nox sensor going out all time should I clean adblue injector that can fix my problem ???
If it blocked you need to clean. Follow the process, if it same problem, it’s should be fine
Did you have to dpf regen manually? What was reading supposed to for both nox sensor after cleaning adblue nozzle ?
I reset fault. Go to trip 750km whitout fault. Tomorrow morning I start my car driving 160km without fault. Than after few hours I start engine again and I got fault of engine.. how long you drive without fault? (2nd nox sensor, merc c250 2015)
Based on the information you provided, you were able to drive 750km without any faults after resetting the fault. Then, the next day, you drove 160km without any issues before encountering a fault with the engine.
So, in total, you drove 910km (750km + 160km) without a fault before the engine issue occurred again. It's important to address the fault code related to the second NOx sensor in your Mercedes C250 2015 to ensure optimal performance and to avoid potential damage to the engine or emissions system. If you haven't already, it might be a good idea to have the vehicle diagnosed by a qualified mechanic or at a dealership to pinpoint and resolve the issue.
Great video. What tester are you using to troubleshoot the fault?
Do you mean my scan tools? if yes please follow this link ,thanks
th-cam.com/video/x0SSgJY5vpk/w-d-xo.htmlsi=rmuKCe5DQQXYKers
how much did it cost the customer to fix charlie?
assessment 120+VAT and 80+VAt for cleaning
i dont need assesment i done that already i just need the ad blue injector cleaned and the exhaust hole how much for that?@@sanumotorswithcharlie
@@user-fi5cj4vi6i please contact us .we need more information
07541021029
Thanks
i told you all you need to know just clean ablue injector and hole and clear codes i dont want to pay £240 quid@@sanumotorswithcharlie
Hello, I got this code fault P229F08, I ve installed a new, non originali sensor, cos the old one gave me 3 fault code, now only one and differente, the ad blue injector is quite cleaned, do you have any idea why this code? Whit the code is written. That the sensor has a malfonction, signal error or wrong message.
Hello there! Thanks for reaching out. It sounds like you've already taken some steps to address the issue with the P229F08 fault code by replacing the sensor. Since you're still encountering the issue, there could be a few things to consider.
Sensor Quality: While you mentioned installing a new sensor, if it's a non-original part, there's a chance it might not be fully compatible or of the same quality as the original. Double-checking the compatibility and quality of the sensor could be worthwhile.
Installation: Ensure that the new sensor is properly installed and securely connected. Sometimes issues can arise from improper installation or loose connections.
System Check: Perform a thorough system check to ensure there are no other underlying issues causing the fault code. This could involve checking related components or systems for any potential malfunctions.
Software Update: In some cases, a software update might be necessary to recalibrate the system after sensor replacement. Check if there are any available updates for your vehicle's software that could address this issue.
Professional Diagnosis: If you're still unable to resolve the issue, it might be best to consult a professional mechanic or technician who can conduct a more comprehensive diagnosis using specialized equipment. They'll be able to pinpoint the exact cause of the fault code and recommend the appropriate solution.
Remember, troubleshooting automotive issues can sometimes be complex, so don't hesitate to seek professional assistance if needed. Good luck, and I hope you're able to resolve the issue soon!
Thank You
@@sanumotorswithcharlie thank you very much friend, I'm an old mecanic, but I still work in My car, in fact I'm using the lauch x431, some calibration isn't there, and the diagnosis always show the nox2 even if you disconnect the number 1, now I' ve decided to change both, and It's 2 days without faults, of course they aren't original Mercedes spare parts, because It's almost impossibile to get even one.
Have a nice day 👍
thanks for the update, looks like to me it needs to be updated Software
your phone number or email please as i have same car and same problem
you can google "SANU MOTORS" or call us 07551021029
thank yoyu