Workshop questions

Today I picked up my Opel Astra from the workshop, where your differential pressure sensor was installed because the old one was defective. The vehicle has now clocked up 325,000 km. The workshop informed me that the catalytic converter needs to be replaced at a cost of €1,300 because the ash content is too high. A friend checked the soot content with his private tester and found that the particulate filter is not that full. Is the repair shop trying to rip me off, or is your sensor giving the wrong reading?

Answer: I think there is a misunderstanding here. I am sure that our new sensor is working properly and displaying the correct values. The workshop is talking about ash content? This is ash that is produced during the regeneration of the particulate filter and accumulates in the filter over time. Your friend is talking about soot content? This is soot that is stored in the particulate filter and will be removed during the next regeneration cycle. If the ash content is too high, the filter must be replaced. If the soot content is too high, the filter can burn itself free by a forced regeneration cycle – provided the fill level is not too high

Hello everyone, the ignition coils on my Focus MKII frequently malfunction. Are your coils superior to those of your competitors?

Answer: You are welcome to try out our ignition coils to see if they are superior. Unfortunately, you have not provided any vehicle data, so we are unable to provide you with an item number.
Please note that individual vehicles become more susceptible to ignition coil defects as they age. This is not due to quality issues but to the ingress of moisture that can damage the coils.
The vehicle manufacturer has not installed any engine top cover on some models. Due to age, leaky windscreen washer nozzles in the bonnet are becoming more and more common, causing water to drip onto the spark plug wells and thus leading to premature failure.
Please check the nozzles for leaks and, if necessary, install an engine cover from Volvo (there are identical engines available) to get the problem under control.

My VW Polo 1.6 TDI with the DGTD engine from 2018/19 has 95 hp and sporadically throws up the error ‘P20EE 00 – Efficiency too low’ or ‘3110 – SCR NOx catalytic converter’ in the data memory via VCDS. This also causes the engine control light to come on. I would therefore like to replace the front NOx sensor. Which part do I need for this?

Answer: We would be happy to sell you a new NOx sensor, but the cause is probably the engine control unit. Please check the unit’s software version using VCDS. It should be higher than or equal to V7798.
If that is not the case, this error will be displayed sporadically due to a possible software mismatch. A new NOx sensor will not solve this problem.
In this case, please contact an authorised workshop to install an update. We are confident that the two errors will no longer occur.

I bought a GEBE NOx sensor from you. Unfortunately, I couldn’t remove the old sensor head from the exhaust, so I cut off the cable and soldered it to your new NOx control unit. Why isn’t the sensor working now?

Answer: This simple repair solution is not possible as the control unit is calibrated to the sensor head during production. The new GEBE sensor has therefore been destroyed and must no longer be soldered as this can lead to contact resistance. As stuck sensor heads occur again and again, we offer our customers a tool set. It includes several tools to remove the sensor head non-destructively and 2 taps to enable reliable installation.

I own a Mercedes-Benz A-Class that was registered in September 2018. The NOx sensor A 000 905 31 09 was originally installed. I have now fitted the GEBE sensor 9 2968 1 from you, which corresponds to this part number. However, the car reports that the sensor cannot be calibrated because it has the wrong part number. What am I doing wrong?

Answer: The NOx sensors for this vehicle have been successively updated by the manufacturer. The replacement sequence is as follows:
A0009053109 (GEBE 9 2968 1) → A0009058111 (GEBE 9 2997 1) → A0009051014 (GEBE 9 3685 1).
Due to product improvements and/or software updates, it is likely that the vehicle’s ECU now only accepts the latest version.
We recommend using the GEBE sensor 9 3685 1, which corresponds to A0009051014. This version will be recognized by the vehicle without any compatibility issues.

The engine light comes on in my SEAT Alhambra 2.0 TDI 4Drive from 2013. The following error is stored in the engine control unit: P220B – NOx Sensor 2 Supply.
This indicates a fault in the second NOx sensor. However, I can only find one NOx sensor in my car. Where is the other faulty sensor supposed to be installed?

Answer: Modern NOx sensors are based on broadband lambda sensor technology. Some manufacturers classify certain lambda sensors as NOx sensors.
In your vehicle, a broadband lambda sensor is installed in position 1, and the actual NOx sensor is installed in position 2. This is why the engine control unit refers to the NOx sensor as “Sensor 2” — the first position is occupied by the lambda sensor, which is not a true NOx sensor but is functionally related.