Monday 28 November 2022

how to replace air quality sensor (G238 : 5K0907659) Tiguan 2017 : 263425 - Air Quality Sensor B10AF 04 [008] - Internal System Fault

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





















1 comment:

95 GTS said...

wow, good work chief. I had to take mine to a garage to fit an oil temperature sender, I'm really out of practice / skillz working on my car