2017 Mk2 Tiguan 150TDI 4Motion , yellow DTC light on
Fault code was
263425 - Air Quality Sensor
B10AF 04 [008] - Internal System Fault
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 3
Reset counter: 243
Mileage: 77120 km
Date: 2022.08.28
Time: 10:16:46
Outside temperature: 19.0 °C
Voltage terminal 30: 14.3 V
System run time-Engine running time: 253 s
System run time-Terminal 15 on: 253 s
Air quality status: Malfunction
System run time-Engine running time: 253 s
System run time-Terminal 15 on: 253 s
threads that helped
https://forums.ross-tech.com/index.php?threads/29183/
https://forums.ross-tech.com/index.php?threads/25677/
non critical role, you can still drive the car
- Sensor for air quality detects pollutants in the ambient air (mostly gasoline and/or diesel fumes).
- The Climatronic Control Module -J255- evaluates the signal from the Air Quality Sensor -G238-. The A/C system is activated depending on the strength and type of heavily polluted air.
This picture , 19 indicates the sensor G238
Note on my UK car this was incorrect, mine was on the passengers side (offside) for me
Air Quality Sensor -G238-, Removing and Installing is shown in the link below.
It also gives a comprehensive list of what the sensor does.
https://www.vwtiguan.org/874/additional_components_for_control_and_regulation.html
dont have access to TPS, so bought from autodoc £39 + 5 shipping, took 5 days
OEM Part number is 5K0907659 (superceeds 1K part number)
PIC
Options also for other sensors for £48 (Hella) £63 (Herth and Buss) and £89 (Vemo) , time will tell if the AIC part is ok
(If i chose again Id probably go for the Hella part as it looks like the part I removed : https://www.autodoc.co.uk/hella/7915637 )
Replacement is easy.
- open bonnet
- sensor is on the RHS (for a uk car)
- remove 1 or more clips holding wiper arm back cover to car body on front edge
- lift up the black plastic cover (enough so you can gain access , you dont need to remove it)
- remove black cover (optional) but its easy
- push tabs to allow removal of sensor from car body bracket
- disconnect connector from sensor
- replace (checking its a match for what you had before) and reverse steps
- use vcds or other to scan and remove any fault codes
