AdBlue issues - remap related?

[Qais2020]

Hi do they charge for an adblue software update. As I had an issue with mine on the weekend called out the AA he said it’s a adblue fault code.

 

[SteveW1963]

Currently sat at VW Commercial in Tewkesbury....

I had a caution on the way back from Devon yesterday. AdBlue top up and spanner in amber.
The van now tells me it’s got 650 miles range until no start. Naturally I topped the AdBlue up, no register at f this on the trip computer. Now it says 600 miles.

I scanned using vcds and got the following:


33262 - Reductant System Performance Bank 1
P204F 00 [100] - Malfunction
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 187651 km
Date: 2042.01.00
Time: 14:30:46

Engine speed: 1918.00 /min
Normed load value: 83.9 %
Vehicle speed: 105 km/h
Coolant temperature: 91 °C
Intake air temperature: 24 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 12.984 V
Unlearning counter according OBD: 40
Simulated particle filter surface temperature: 326.5 °C
Reducing agent fill level sensor: act. value: 75 mm
Sensor for reducing agent tank temperature: temperature: 25.5 °C
Calculated NOx concentration behind turbocharger: 0 ppm
NOx sens.dwnstrm.SCR cat conv: NOx conc.: 70 ppm
Reducing agent quality sensor: urea concentration: 0.00 %

31103 - SCR NOx Catalyst Bank 1
P20EE 00 [100] - Efficiency too Low
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 187635 km
Date: 2042.01.00
Time: 14:21:12

Engine speed: 1843.50 /min
Normed load value: 59.6 %
Vehicle speed: 101 km/h
Coolant temperature: 91 °C
Intake air temperature: 25 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 13.031 V
Unlearning counter according OBD: 40
Air mass at air mass meter 1: 165.6 kg/h
Extern.temp.sens.1 bank 1: raw value: 24.0 °C
Mass airflow sensor 1 bank 1 airflow: raw value: 760.8 mg/stroke
Throttl.valve adapt. 1 bank 1: posit feedback - Act.value: 64.17 %
NOx sensor before SCR cat conv: offset correction factor: 0 ppm
NOx sensor after SCR cat conv: offset correction factor: 95 ppm
Reducing agent quality sensor: urea concentration: 0.00 %
Reducing agent quality sensor: raw temperature value: 0.0 °C

bit of reading suggests a VW software update may fix the issue so, that’s being done now.
The van is mapped and I’ve been told that it’ll remove the map - fair enough I’ll have to have it redone.
I just thought I’d create a post to log another AdBlue fault and will update once the issue is resolved.
Josh

I have exacted the same fault code and problem, I’ve read all the forums I cannot determine whether it’s a Nox sensor fault, a def injector problem crystallised adblue, van is 2017 with only 31k miles. It’s had spender map but the problem only started in he recent cold period, has anyone any ideas? How did you resolve your problem? Thanks

 

[WS338]

I have exacted the same fault code and problem, I’ve read all the forums I cannot determine whether it’s a Nox sensor fault, a def injector problem crystallised adblue, van is 2017 with only 31k miles. It’s had spender map but the problem only started in he recent cold period, has anyone any ideas? How did you resolve your problem? Thanks

I had the P204 and the P20EE. the software update and recalibration of the level sensor got sorted but received numerous P20EE faults resulting in 6 trips to VW and having my van for over 50 days last year.
So in order I had the software update, new nox sensor, twice they didn’t really do anything, new inlet manifold and then glow plug chamber on no.3 cylinder cleaned out as it has a pressure sensor in it. I still got pending P20EE codes on average every 300 miles. I havent had one now for 3000 miles.