2012 Q7 TDI
04-22-2024, 09:15 PM
#1
2012 Q7 TDI
Hey everyone,
I'm dealing with some engine issues and could use some advice.
Should I begin by cleaning the NOx sensor or checking the DEF injector?
Thanks!
I'm dealing with some engine issues and could use some advice.
Should I begin by cleaning the NOx sensor or checking the DEF injector?
Thanks!
Address 01: Engine (J623-CATA) Labels:. 059-907-401-V2.clb
Part No SW: 4L2 910 401 HW: 4L0 907 401 D
8 Faults Found:
9583 - NOx Sensor 1 Bank 1
P2200 00 [096] - Electrical Malfunction
Intermittent - Not Confirmed - Tested Since Memory Clear
9645 - Reductant
P20E8 00 [096] - Pressure too Low
Intermittent - Not Confirmed - Tested Since Memory Clear
9659 - Sensor for NOx (G295)
P1019 00 [096] - Signal too Slow
[New feature! Extended UDS fault detail is only supported by current gen. interfaces]
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 163791 km
Date: 2024.04.20
Time: 16:59:02
Engine RPM: 1351.50 /min
Normed load value: 0.0 %
Vehicle speed: 30 km/h
Coolant temperature: 88 ∞C
Intake air temperature: 22 ∞C
Ambient air pressure: 980 mbar
Voltage terminal 30: 14.700 V
Unlearning counter according OBD: 40
Air mass: actual value (mg/stroke): 570.5 mg/stroke
EGR Vacuum Regulator Solen.val.: activation: 100.00 %
NOx Emission NOx-Sensor 2: 39 ppm
NOx Emission NOx Sensor: 1650 ppm
Mean injection quantity: 0.00 mg/stroke
Calculated NOx concentration behind turbocharger: 0 ppm
Exhaust gas temperature sensor 1: 205.5 ∞C
9574 - NOx Sensor 1 Bank 1
P2200 00 [096] - Electrical Malfunction
Intermittent - Not Confirmed - Tested Since Memory Clear
9580 - NOx Sensor 1 Bank 1
P2201 00 [096] - Implausible Signal
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 163767 km
Date: 2024.04.19
Time: 16:57:04
Engine RPM: 1184.00 /min
Normed load value: 0.0 %
Vehicle speed: 49 km/h
Coolant temperature: 78 ∞C
Intake air temperature: 5 ∞C
Ambient air pressure: 980 mbar
Voltage terminal 30: 14.900 V
Unlearning counter according OBD: 40
Air mass: actual value (mg/stroke): 613.2 mg/stroke
EGR Vacuum Regulator Solen.val.: activation: 100.00 %
NOx Emission NOx-Sensor 2: 18 ppm
NOx Emission NOx Sensor: 1650 ppm
Mean injection quantity: 0.00 mg/stroke
Calculated NOx concentration behind turbocharger: 0 ppm
Exhaust gas temperature sensor 1: 180.1 ∞C
9690 - Sensor for NOx (G295)
P1032 00 [096] - Signal too High
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 3
Mileage: 163796 km
Date: 2024.04.20
Time: 17:54:32
Engine RPM: 780.00 /min
Normed load value: 27.8 %
Vehicle speed: 0 km/h
Coolant temperature: 86 ∞C
Intake air temperature: 14 ∞C
Ambient air pressure: 980 mbar
Voltage terminal 30: 14.660 V
Unlearning counter according OBD: 40
Air mass: actual value (mg/stroke): 486.2 mg/stroke
EGR Vacuum Regulator Solen.val.: activation: 100.00 %
NOx Emission NOx-Sensor 2: 259 ppm
NOx Emission NOx Sensor: 1229 ppm
Mean injection quantity: 9.60 mg/stroke
Calculated NOx concentration behind turbocharger: 232 ppm
Exhaust gas temperature sensor 1: 183.2 ∞C
9643 - Reductant
P20E8 00 [096] - Pressure too Low
[New feature! Extended UDS fault detail is only supported by current gen. interfaces]
Intermittent - Not Confirmed - Tested Since Memory Clear
5162 - Particulate Filter; Differential Pressure Sensor
P2453 00 [237] - Implausible Signal
[New feature! Extended UDS fault detail is only supported by current gen. interfaces]
MIL ON - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 2
Mileage: 162482 km
Date: 2024.03.15
Time: 08:59:27
Engine RPM: 0.00 /min
Normed load value: 0.0 %
Vehicle speed: 0 km/h
Coolant temperature: 85 ∞C
Intake air temperature: 9 ∞C
Ambient air pressure: 980 mbar
Voltage terminal 30: 12.120 V
Unlearning counter according OBD: 40
Sensor for particle filter differential press: raw value: 31 hPa
Particle filter: difference pressure: 3 hPa
DPF: offset for differential pressure: 28 hPa
Particle filter: differential pressure: dynamic offset: 0 hPa
Outside temperature: 1.0 ∞C
Particle filter: soot mass measured: 3.56 g
Particle filter: soot mass calculated: 14.50 g
Readiness: 1 1 0 0 0
Part No SW: 4L2 910 401 HW: 4L0 907 401 D
8 Faults Found:
9583 - NOx Sensor 1 Bank 1
P2200 00 [096] - Electrical Malfunction
Intermittent - Not Confirmed - Tested Since Memory Clear
9645 - Reductant
P20E8 00 [096] - Pressure too Low
Intermittent - Not Confirmed - Tested Since Memory Clear
9659 - Sensor for NOx (G295)
P1019 00 [096] - Signal too Slow
[New feature! Extended UDS fault detail is only supported by current gen. interfaces]
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 163791 km
Date: 2024.04.20
Time: 16:59:02
Engine RPM: 1351.50 /min
Normed load value: 0.0 %
Vehicle speed: 30 km/h
Coolant temperature: 88 ∞C
Intake air temperature: 22 ∞C
Ambient air pressure: 980 mbar
Voltage terminal 30: 14.700 V
Unlearning counter according OBD: 40
Air mass: actual value (mg/stroke): 570.5 mg/stroke
EGR Vacuum Regulator Solen.val.: activation: 100.00 %
NOx Emission NOx-Sensor 2: 39 ppm
NOx Emission NOx Sensor: 1650 ppm
Mean injection quantity: 0.00 mg/stroke
Calculated NOx concentration behind turbocharger: 0 ppm
Exhaust gas temperature sensor 1: 205.5 ∞C
9574 - NOx Sensor 1 Bank 1
P2200 00 [096] - Electrical Malfunction
Intermittent - Not Confirmed - Tested Since Memory Clear
9580 - NOx Sensor 1 Bank 1
P2201 00 [096] - Implausible Signal
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 163767 km
Date: 2024.04.19
Time: 16:57:04
Engine RPM: 1184.00 /min
Normed load value: 0.0 %
Vehicle speed: 49 km/h
Coolant temperature: 78 ∞C
Intake air temperature: 5 ∞C
Ambient air pressure: 980 mbar
Voltage terminal 30: 14.900 V
Unlearning counter according OBD: 40
Air mass: actual value (mg/stroke): 613.2 mg/stroke
EGR Vacuum Regulator Solen.val.: activation: 100.00 %
NOx Emission NOx-Sensor 2: 18 ppm
NOx Emission NOx Sensor: 1650 ppm
Mean injection quantity: 0.00 mg/stroke
Calculated NOx concentration behind turbocharger: 0 ppm
Exhaust gas temperature sensor 1: 180.1 ∞C
9690 - Sensor for NOx (G295)
P1032 00 [096] - Signal too High
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 3
Mileage: 163796 km
Date: 2024.04.20
Time: 17:54:32
Engine RPM: 780.00 /min
Normed load value: 27.8 %
Vehicle speed: 0 km/h
Coolant temperature: 86 ∞C
Intake air temperature: 14 ∞C
Ambient air pressure: 980 mbar
Voltage terminal 30: 14.660 V
Unlearning counter according OBD: 40
Air mass: actual value (mg/stroke): 486.2 mg/stroke
EGR Vacuum Regulator Solen.val.: activation: 100.00 %
NOx Emission NOx-Sensor 2: 259 ppm
NOx Emission NOx Sensor: 1229 ppm
Mean injection quantity: 9.60 mg/stroke
Calculated NOx concentration behind turbocharger: 232 ppm
Exhaust gas temperature sensor 1: 183.2 ∞C
9643 - Reductant
P20E8 00 [096] - Pressure too Low
[New feature! Extended UDS fault detail is only supported by current gen. interfaces]
Intermittent - Not Confirmed - Tested Since Memory Clear
5162 - Particulate Filter; Differential Pressure Sensor
P2453 00 [237] - Implausible Signal
[New feature! Extended UDS fault detail is only supported by current gen. interfaces]
MIL ON - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 2
Mileage: 162482 km
Date: 2024.03.15
Time: 08:59:27
Engine RPM: 0.00 /min
Normed load value: 0.0 %
Vehicle speed: 0 km/h
Coolant temperature: 85 ∞C
Intake air temperature: 9 ∞C
Ambient air pressure: 980 mbar
Voltage terminal 30: 12.120 V
Unlearning counter according OBD: 40
Sensor for particle filter differential press: raw value: 31 hPa
Particle filter: difference pressure: 3 hPa
DPF: offset for differential pressure: 28 hPa
Particle filter: differential pressure: dynamic offset: 0 hPa
Outside temperature: 1.0 ∞C
Particle filter: soot mass measured: 3.56 g
Particle filter: soot mass calculated: 14.50 g
Readiness: 1 1 0 0 0
04-23-2024, 01:29 PM
#2
AudiWorld Super User
Hi,
Helpful if you will share what 'symptoms' you are noticing from the car...beyond the scan data, as this will help members to understand what is being impacted. Paint us a picture.
It is pretty typical of the reductant system (DEF spray = NOx emissions level reduction from tailpipe) to begin experiencing problems around/after 100k miles, which is right about where yours is sitting, based on the scan data provided.
The course of action required really depends on what you are seeing inside the car in conjunction with the scan data. For example, if the transfer pump is failed from main DEF storage tank undercar to refill DEF in the working tank (very typical item), then it'll only go for a limited range of few thousand kilometers before firing off the dash alert to tell you to refill the DEF tank, as the working tank is quite small, etc.
Then there's also another pump on the working tank (located behind wheel liner, next to fuel cap in rear fender of car) specifically to pressurize the DEF to allow the injector to function properly, and the injector is controlled by the NOx sensor, etc., and of course sometimes the injector can get gummed up, but most often it is the other bits that transfer, pressurize, or regulate the system that are the root-cause issue.
To sort it out, you have to really look at the symptoms presented by the car, especially in the messaging you will receive inside the car related to miles to 'no-restart', whether that seems to be accurate or it is bouncing around up/down in that calculation, etc.
On my '10, first the transfer pump feeding the working tank went out (TDI warranty), then later began getting no-restart message with an oddly changing mileage number that seemed to bounce around randomly, which ended up being a bad NOx sensor (TDI warranty), and at one point It also began leaking DEF just behind the right-rear wheel onto ground, and the dealer replaced the entire working tank/pump assembly, etc (also warranty), so basically every bit of my reductant system has been replaced over the course of about a year's time via the TDI extended warranty, however my car was a buy-back, so it sat in storage a few years, which isn't great for the longevity of systems like these.
Fun fact: DEF has a short shelf-life, so be sure you check the expiration date whenever buying DEF, and be sure there is no crusty accumulation on the exterior of the bottle/jug, etc., which is a sign the DEF is leaking and then oxidizing/crystallizing...not good to put in your car's DEF tank.
Post more details on your car's symptoms, and you'll get more direct responses. As always, the internet search is one of your most powerful tools to locate archival threads on topic and related videos, etc. Forums are great, but these cars have been around for awhile now, so most anything you looking for already exists as a resource.
Helpful if you will share what 'symptoms' you are noticing from the car...beyond the scan data, as this will help members to understand what is being impacted. Paint us a picture.
It is pretty typical of the reductant system (DEF spray = NOx emissions level reduction from tailpipe) to begin experiencing problems around/after 100k miles, which is right about where yours is sitting, based on the scan data provided.
The course of action required really depends on what you are seeing inside the car in conjunction with the scan data. For example, if the transfer pump is failed from main DEF storage tank undercar to refill DEF in the working tank (very typical item), then it'll only go for a limited range of few thousand kilometers before firing off the dash alert to tell you to refill the DEF tank, as the working tank is quite small, etc.
Then there's also another pump on the working tank (located behind wheel liner, next to fuel cap in rear fender of car) specifically to pressurize the DEF to allow the injector to function properly, and the injector is controlled by the NOx sensor, etc., and of course sometimes the injector can get gummed up, but most often it is the other bits that transfer, pressurize, or regulate the system that are the root-cause issue.
To sort it out, you have to really look at the symptoms presented by the car, especially in the messaging you will receive inside the car related to miles to 'no-restart', whether that seems to be accurate or it is bouncing around up/down in that calculation, etc.
On my '10, first the transfer pump feeding the working tank went out (TDI warranty), then later began getting no-restart message with an oddly changing mileage number that seemed to bounce around randomly, which ended up being a bad NOx sensor (TDI warranty), and at one point It also began leaking DEF just behind the right-rear wheel onto ground, and the dealer replaced the entire working tank/pump assembly, etc (also warranty), so basically every bit of my reductant system has been replaced over the course of about a year's time via the TDI extended warranty, however my car was a buy-back, so it sat in storage a few years, which isn't great for the longevity of systems like these.
Fun fact: DEF has a short shelf-life, so be sure you check the expiration date whenever buying DEF, and be sure there is no crusty accumulation on the exterior of the bottle/jug, etc., which is a sign the DEF is leaking and then oxidizing/crystallizing...not good to put in your car's DEF tank.
Post more details on your car's symptoms, and you'll get more direct responses. As always, the internet search is one of your most powerful tools to locate archival threads on topic and related videos, etc. Forums are great, but these cars have been around for awhile now, so most anything you looking for already exists as a resource.
The following users liked this post:
rich2020 (04-24-2024)
04-24-2024, 08:37 AM
#3
Hi,
Thank you for the detailed response.
Currently, apart from the check engine light that I mentioned previously, I haven't noticed any other issues with the car's behaviour.
I added DEF last summer, and I'm planning to fill it up again now and monitor its usage closely.
Thank you for the detailed response.
Currently, apart from the check engine light that I mentioned previously, I haven't noticed any other issues with the car's behaviour.
I added DEF last summer, and I'm planning to fill it up again now and monitor its usage closely.
04-24-2024, 11:18 AM
#4
AudiWorld Super User
OK, so that's good news then if you only got the CEL; probably just a bad NOx sensor that is throwing things out of balance then. Seems that sensor 1 bank one NOx sensor is most likely the one based on your dataset. The code will definitely come back again if you aren't sure which NOx sensor was triggering the CEL.
In 'normal use' the DEF tanks (undercar + working tank) total capacity is designed to be large enough to closely mirror the oil change interval before requiring refill. The 'dieselgate' ECU reflash results in additional DEF being injected to help reduce NOx emissions, and so it generally consumes more DEF per oil change interval. Myriad factors like fuel quality, driving style, towing/vehicle load, etc., affect the DEF consumption, so your mileage may vary. What's important to know on that is when the transfer pump from the large storage tank undercar goes out, then you are left with the smaller working tank, which holds about one gallon of DEF; enough to last roughly 1500-2000 miles. So you will definitely see dashboard DEF refill alerts at significantly shorter intervals if the DEF transfer pump has failed.
That does not appear to be an issue for your car at this point, so focus your attention on the error code(s) triggering the CEL. When you scan for codes after CEL illuminates, you will see MIL ON or CEL ON reflected/included as part of the dataset with the trouble code that is triggering due to reading outside of 'normal' operating parameters, etc.
In 'normal use' the DEF tanks (undercar + working tank) total capacity is designed to be large enough to closely mirror the oil change interval before requiring refill. The 'dieselgate' ECU reflash results in additional DEF being injected to help reduce NOx emissions, and so it generally consumes more DEF per oil change interval. Myriad factors like fuel quality, driving style, towing/vehicle load, etc., affect the DEF consumption, so your mileage may vary. What's important to know on that is when the transfer pump from the large storage tank undercar goes out, then you are left with the smaller working tank, which holds about one gallon of DEF; enough to last roughly 1500-2000 miles. So you will definitely see dashboard DEF refill alerts at significantly shorter intervals if the DEF transfer pump has failed.
That does not appear to be an issue for your car at this point, so focus your attention on the error code(s) triggering the CEL. When you scan for codes after CEL illuminates, you will see MIL ON or CEL ON reflected/included as part of the dataset with the trouble code that is triggering due to reading outside of 'normal' operating parameters, etc.
The following users liked this post:
rich2020 (04-24-2024)
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