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AME · 04/12/2023, 12h52

Je viens de tomber sur ce post : https://forums.ross-tech.com/index.php?threads/29644/

Ran the MAF plausibility test and it completed and said not OK. Fault is then on the system as below:

7330 - Mass Air Flow Sensor (G70)
P0101 00 [167] - Implausible Signal
MIL ON - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 218981 km
Date: 2021.10.25
Time: 18: 29: 41

Engine RPM: 2242.00 /min
Normed load value: 10.6 %
Vehicle speed: 0 km/h
Coolant temperature: 93 �C
Intake air temperature: 55 �C
Ambient air pressure: 990 mbar
Voltage terminal 30: 14.456 V
Unlearning counter according OBD: 40
Air mass: ****** value (mg/stroke)-MAF_MES: 556.766 mg/stroke
Air mass proportion filtered-FAC_MAF_CYL_KGH_RATIO_FIL: 0.84100
EGR Solen.val.: ****** value-ANG_EGRV[0]: 0.000 %
Throttle valve adapter: ****** value-ANG_THR[0]: 94.995 %
Charge air pressure: specified value-MAP_SP_MMV: 1137.05 hPa
Charge air pressure: ****** value-MAP_MMV: 1137.05 hPa
Engine torque-TQI_SP: 36.44 Nm

Welllll. Changed the MAF and it went worse! ******ly had some help from my son this time and because he could rev whilst I'm in the engine bay I heard a sound like wheezing. Upon further investigation I found a leak of air from the turbo outlet towards the intercooler. Sure enough there was a split in the 120mm long reinforced hose. This is definitely causing issues and hopefully when I replace the £16 hose (or £62 from Audi) all will be well....holds his breath. :rolleyes: Tell you how it goes on Saturday. Thought it may have been the intercooler but this would give the same symptoms, implausible signal and air leak. I just wish I knew what air leak was before trying to find a vac hose or breather pipe failure or induction to the turbo hose fail. surely this should have given a boost problem post turbo!

Je n'ai pas bien compris de quel tuyau il parle.
Je vais tout de même inspecter les tuyaux.... Pas facile de détecter une fuite avec le bruit du moteur !
Je vais également lancer un test du turbo...

---------- Post added at 13h52 ---------- Previous post was at 13h47 ----------

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04/12/2023, 12h52
AME Membre attaché Date d'inscription: juin 2011 Localisation: France, Roissy CDG Âge: 53 Messages: 498 Thanks: 217 Thanked 418 Times in 151 Posts Pouvoir de réputation: 20	Je viens de tomber sur ce post : https://forums.ross-tech.com/index.php?threads/29644/ Ran the MAF plausibility test and it completed and said not OK. Fault is then on the system as below: 7330 - Mass Air Flow Sensor (G70) P0101 00 [167] - Implausible Signal MIL ON - Not Confirmed - Tested Since Memory Clear Freeze Frame: Fault Status: 00000001 Fault Priority: 2 Fault Frequency: 1 Mileage: 218981 km Date: 2021.10.25 Time: 18: 29: 41 Engine RPM: 2242.00 /min Normed load value: 10.6 % Vehicle speed: 0 km/h Coolant temperature: 93 �C Intake air temperature: 55 �C Ambient air pressure: 990 mbar Voltage terminal 30: 14.456 V Unlearning counter according OBD: 40 Air mass: **** value (mg/stroke)-MAF_MES: 556.766 mg/stroke Air mass proportion filtered-FAC_MAF_CYL_KGH_RATIO_FIL: 0.84100 EGR Solen.val.: ** value-ANG_EGRV[0]: 0.000 % Throttle valve adapter: ** value-ANG_THR[0]: 94.995 % Charge air pressure: specified value-MAP_SP_MMV: 1137.05 hPa Charge air pressure: ** value-MAP_MMV: 1137.05 hPa Engine torque-TQI_SP: 36.44 Nm Welllll. Changed the MAF and it went worse! ****ly had some help from my son this time and because he could rev whilst I'm in the engine bay I heard a sound like wheezing. Upon further investigation I found a leak of air from the turbo outlet towards the intercooler. Sure enough there was a split in the 120mm long reinforced hose. This is definitely causing issues and hopefully when I replace the £16 hose (or £62 from Audi) all will be well....holds his breath. :rolleyes: Tell you how it goes on Saturday. Thought it may have been the intercooler but this would give the same symptoms, implausible signal and air leak. I just wish I knew what air leak was before trying to find a vac hose or breather pipe failure or induction to the turbo hose fail. surely this should have given a boost problem post turbo! Je n'ai pas bien compris de quel tuyau il parle. Je vais tout de même inspecter les tuyaux.... Pas facile de détecter une fuite avec le bruit du moteur ! Je vais également lancer un test du turbo... ---------- Post added at 13h52 ---------- Previous post was at 13h47 ---------- [IMG][/IMG]