jdragon

The AC started working fine but only because the flaps had become stuck in the open position. I was able get this covered under Warranty so the motor was replaced on Friday, now everything is operating as it should. I found this video which helped:

Car is running fine (perhaps MPGs have dropped a little) but the P2002 00 fault code keeps coming back. After some more research it would seem I've missed a potential (G450 EGR or G451 DPF) sensor issue. These are usually indicated by the relevant fault code, but not always. I measured as follows from cold start: Engine off: IDE07084 Differential pressure ratio: low-pressure EGR 0.0 kg/h IDE07086 Exhaust mass flow of low-pressure EGR: calculated 1.317 IDE07378 Exhaust flap actuator 1: B1: inlet pressure - specified value 1006.0 hPa IDE07385 Exhaust flap actuator 1: B1: inlet pressure - actual value calculated 1006.0 hPa IDE07744 Particle filter: air pressure sensor 1 bank 1: raw value 0 hPa IDE07745 Particl.filt.: different.press.sensor 1 bank 1: adaptat. value 1 hPa IDE07747 Par.fil: diff.pr.sens.1 bank 1: offset 0 hPa IDE07750 Exhaust recirculat.2: different.press.sens.1 bank 1: raw value -4.2 hPa IDE07751 Exh.recircul. 2: differential pres.sensor 1 bank 1: adap. value -2.8 hPa IDE07754 Exhaust recirculation valve 1 bank 1: activation 0.00 % -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Idle: IDE07084 Differential pressure ratio: low-pressure EGR 3.6 kg/h IDE07086 Exhaust mass flow of low-pressure EGR: calculated 1.317 IDE07378 Exhaust flap actuator 1: B1: inlet pressure - specified value 1013.3 hPa IDE07385 Exhaust flap actuator 1: B1: inlet pressure - actual value calculated 1013.3 hPa IDE07744 Particle filter: air pressure sensor 1 bank 1: raw value 12 hPa IDE07745 Particl.filt.: different.press.sensor 1 bank 1: adaptat. value 12 hPa IDE07747 Par.fil: diff.pr.sens.1 bank 1: offset 0 hPa IDE07750 Exhaust recirculat.2: different.press.sens.1 bank 1: raw value 6.7 hPa IDE07751 Exh.recircul. 2: differential pres.sensor 1 bank 1: adap. value 8.1 hPa IDE07754 Exhaust recirculation valve 1 bank 1: activation -9.04 % -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- ~2000 RPM: IDE07084 Differential pressure ratio: low-pressure EGR 16.2 kg/h IDE07086 Exhaust mass flow of low-pressure EGR: calculated 1.317 IDE07378 Exhaust flap actuator 1: B1: inlet pressure - specified value 1032.3 hPa IDE07385 Exhaust flap actuator 1: B1: inlet pressure - actual value calculated 1032.3 hPa IDE07744 Particle filter: air pressure sensor 1 bank 1: raw value 26 hPa IDE07745 Particl.filt.: different.press.sensor 1 bank 1: adaptat. value 26 hPa IDE07747 Par.fil: diff.pr.sens.1 bank 1: offset 0 hPa IDE07750 Exhaust recirculat.2: different.press.sens.1 bank 1: raw value 30.1 hPa IDE07751 Exh.recircul. 2: differential pres.sensor 1 bank 1: adap. value 31.4 hPa IDE07754 Exhaust recirculation valve 1 bank 1: activation -11.28 % IDE07750 and IDE07751 went up to ~50 hPa at the same RPM if that has any relevance -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- The behaviour appears to be typical i.e. the pressure increases with RPM. I've probably measured some useless bocks there too 😄 From what I have understand, the DPF sensor offset value shouldn't be 0 hPa, is that correct?

Thanks Steve. I'll do exactly that, and keep tabs on the regens, soot and ash values. I found a TPI about this P2002 00 code I'm seeing. Interesting statement about the clogging being caused by the reducing agent. If the code keeps returning, I'll have to consider the EGR as the next step. TPI_2050077-7.pdf

Thanks. I like the thought of hazards flashing with emergency brake, so will do that. Still haven't found a working solution to disable the engine on warning 🙃

Here's a few more tweaks confirmed working: -------------------------------- Comfort Blinking: [46-Central Module] > [Adaptation-10] > Turn Signal Control > Freeway Flashing Cycles > Current Value: 3 > New Value: 5 (1-5 possible) -------------------------------- Increase time required to open boot with remote: [46 - Central Convenience] > [Adaptation - 10] > IDE08400-Actuation time to open rear lid with remote control > Current Value: 800 (ms) > New Value: 2000 > Do it -------------------------------- Windows Open/Close with Fob: [46-Cent. Conv] > [Coding] > [Long Coding Helper] > Allow Experimental Data > Byte 12 > Bit 0 = Comfort_operation > active --------------------------------

From the little data I have over the past 8 or so weeks, it's doing a regen every 290 miles - Google suggests this is normal but I don't know? I'll happily put another bottle in with my next full tank of diesel. And the Archoil should be here on Friday so I'll add that too.

Here's the data from the night before I used the Cataclean: ----------------------------------------------------------------------- Monday,25,April,2022,20:06:45 Mileage: 114587km-71201miiles IDE00430-ENG57549 Particle filter: field regeneration request status-Bits 0-7 0 IDE00432 Particle filter: time since last regeneration 5.650 H IDE00434 Particle filter: soot mass calculated 22.12 g IDE00435 Particle filter: soot mass measured 5.39 g IDE00436 Particle filter: kilometers since last regeneration 395.1 km IDE06059 Particulate filter: oil ash mass 27.4953320 g IDE06060 Particulate filter ash load limit 80.000 g ----------------------------------------------------------------------- I drove to work in 5th gear so the revs were at around 2000rpm There are several corners and roundabouts within 0.5 mile of leaving work before I get onto the the A road. I instantly noticed the car was much smoother accelerating cold, so much that I forgot to stop and fill up on my way home 😄 Measured values after driving 86 miles with cataclean in 1/4 tank: ----------------------------------------------------------------------- Tuesday,26,April,2022,18:25:59 Mileage: 114725km-71287miiles IDE00430-ENG57549 Particle filter: field regeneration request status-Bits 0-7 0 IDE00432 Particle filter: time since last regeneration 1.049 H IDE00434 Particle filter: soot mass calculated 7.55 g IDE00435 Particle filter: soot mass measured -2.93 g IDE00436 Particle filter: kilometers since last regeneration 64.4 km IDE06059 Particulate filter: oil ash mass 27.5283779 g IDE06060 Particulate filter ash load limit 80.000 g ----------------------------------------------------------------------- Looking at the mileage, the car did a regen shortly after starting my drive home, so not stopping wasn't a bad thing in the end. The soot values are slightly less than when I measure after the last regen, but the last regen was done at idle, and I had done an additional 25 miles before I read the values posted Apr 20, so I cannot say for sure if the soot values were reduced more. The best I could do is check after another 25 miles to see how the values compare. However, I assume with the cataclean running through whilst the regen was being done, it would yield the best possible outcome in terms of cleaning?

I've got 13l in the tank according to VCDS so I'll use the bottle I have in the morning and drive to work, which is about 40 minutes of A roads. Will report back tomorrow evening.

Would there be any advantage in emptying two bottles into 30 litres of fuel?

I have the cataclean and instructions say "remove seal" but there isn't one. The seal/foil insert in the lid is damaged because I picked at it to see if the seal had popped off in the post, but there is no chance that could've happened. Is this normal? There was no other seal on the bottle securing the lid or contents.

Welcome. What brings you to the forum?

The V5 for my previous A4 B8 said it was 'Automatic' but it was definitely a manual, and always had been.

I'd just need to manipulate the setup so the flaps are always open. Should be easy enough. I'm fitting a honeycomb grill tomorrow afternoon, so I'll probably have a look after that if there's enough daylight left 😄

That's a very convincing recommendation. Is this the correct version? https://www.amazon.co.uk/gp/aw/d/B01IDD99T8/ref=ox_sc_saved_image_2?smid=A16LCI2OKPZO4H&psc=1

I'm working through a couple of errors found in a scan. ------------------------------------------------------------------------------- Address 08: Auto HVAC (E87) Labels:* Redir Fail! Part No SW: 8W0 820 043 T HW: 8W0 820 043 T Component: Klima Zone 3 H60 0251 Coding: 141800295544440D02000100880000000000000000000000000000000000 Shop #: WSC 56021 002 1048576 ASAM Dataset: EV_AirCondiBHTCAU491 001013 ROD: EV_AirCondiBHTCAU491.rod VCID: 44D143C82E1B0FFBABA-8010 Fresh air blower control module (front): Subsystem 1 - Part No SW: 4M2 820 021 A HW: 4M2 820 021 A Component: J126 FLuftV H08 0003 Serial number: 00000000000001758876 Humidity sensor: exterior: Subsystem 2 - Part No SW: 4H0 907 658 A HW: 4H0 907 658 A Component: AQ_Hum_Sensor H01 0006 Serial number: ADD09EB880PAG0MUFU02 Rear A/C control head: Subsystem 3 - Part No SW: 8W0 919 158 HW: 8W0 919 158 Component: E265 Kli Fond H40 0080 1 Fault Found: 328003 - Motor for Recirculation Flap B1092 07 [009] - Mechanical Failure Confirmed - Tested Since Memory Clear Freeze Frame: Fault Status: 00000001 Fault Priority: 5 Fault Frequency: 1 Reset counter: 206 Mileage: 113708 km Date: 2022.04.05 Time: 12:19:48 Recirc. air flap motor: spec.value: 11907 Recirculation air flap motor: actual value: 10006 System run time-Engine running time: 0 s System run time-Terminal 15 on: 472 s Recirculation air flap motor: diagnostic-Last operating state: No routine started Recirculation air flap motor: diagnostic-Operating condition: Blocking handling Voltage terminal 30: 11.68 V Outside temperature: 14.00 °C ------------------------------------------------------------------------------- The behaviour I am experiencing is intermittent, regardless of auto or manual mode temperature and air flow speed. What happens is the aircon seemingly goes into 'recirculation mode' shortly after starting a journey with no lights indicating the setting has changed i.e. the flaps at the bulkhead intake close, which throttles the air flow through into the cabin vents. A visual check in this error state has confirmed the flaps at the bulkhead intake are closed, each and every time air flow is restricted into the cabin. Something to note; if I press the windscreen button the air blasts through, but still not through the vents. If I select 'air con off' the flaps at the bulkhead intake will open (if they are closed with 'air con on') allowing air to flow through the vents - this would be ok if I only wanted warm air. Something else that happened is the fans were blowing according to the speed level setting I had selected at 20degC but I was getting warm so I reduced the temperature, which in turn reduced the fan/air flow speed into the cabin (the speed level indicator on the display did not change). This seemed repeatable when increasing the temp again, but the air flow speed topped out at 20degC, so I reduced the temperature again down to 17degC in 0.5 increments, and the fan consistently reduced and held at each change, then all of a sudden the air flow speed went back up according to the speed level setting on the display. The next time I was able to pull over and observe the flap positions for each temp setting: https://imgur.com/Exwefts https://imgur.com/Iaxq1Jp http://imgur.com/QZ5PjyK http://imgur.com/sC9Ul2a http://imgur.com/uDQMlmf http://imgur.com/Z6QRVj5 http://imgur.com/Htza5jm https://imgur.com/IV56m8Y I have found that if I stop and start the car, the behaviour sometimes corrects itself. In an attempt to resolve this, I cleared the error and did the following with VCDS: [Select] [08-HVAC] [Basic Settings] [Drop down menu: IDE01546-adapt door end stops] [Go!] The routine completed with no errors but still I have the problem (and an additional error code: 65543 - No Basic Setting B2010 09 [009] which just will not clear). I think I have two options here: 1. Replace the recirculation motor. According to the erWIN Audi repair sheet I downloaded it's 4M0.820.511.A 2. Pull the flaps open essentially mechanically fixing the position, and ignore the error code (I don't use recirculation anyway). However, if anyone has any suggestions I would be happy to consider them (also posted on Ross-Tech forum).

I appreciate the explanation, so thank you for taking the time to reply. My engineering mind is running wild with this, though at some point I need to accept the system for what it is, and enjoy the car. From what I can understand, the soot values I'm seeing are OK and will be easy to manage with decent fuel and the millers/Hydra/Archoil with my current driving schedule? I'll definitely be using the cataclean. Is there a recommended frequency for using it?

Not cataclean yet but I did my usual 34mile (x2) trip to work today and hooked up the VCDS to look at this again. The error code has not returned and values as follows: --------------------------------------------------------------------------------- Wednesday,20,April,2022,19:10:25 Mileage: 114294km-71019miiles IDE00430-ENG57549 Particle filter: field regeneration request status-Bits 0-7 0 IDE00432 Particle filter: time since last regeneration 1.322 H IDE00434 Particle filter: soot mass calculated 9.49 g IDE00435 Particle filter: soot mass measured -0.67 g IDE00436 Particle filter: kilometers since last regeneration 105.8 km IDE06059 Particulate filter: oil ash mass 27.4332197 g IDE06060 Particulate filter ash load limit 80.000 g --------------------------------------------------------------------------------- It looks stable currently. I wonder if there is any possibility that the initial error was caused by some build up being dislodged(?) since the car has been moving again, and I've been using Millers Diesel Power Ecomax (used with my old A4 B8 with good results) which has now been burnt off - too early to tell perhaps. I've been posting this on the Ross Tech Forum should anyone not be familiar with that resource https://forums.ross-tech.com/index.php?threads/31977/

Quick update: On Friday I did a 40 mile drive, then a few days of short trips, and a 40 mile drive on Monday. Today I drove to and from work (34 mile) and checked the soot values which were: IDE00434 Particle filter: soot mass calculated 22.48 g IDE00435 Particle filter: soot mass measured 6.52 g The car stood idle for ~2 hours then I took my son to football training which is a 10 minute drive of A roads. When I got back and parked the car, the fan was running so I checked and it was doing a regen. I measured the values just before the fan stopped at: IDE00432 Particle filter: time since last regeneration 7.547 H IDE00434 Particle filter: soot mass calculated 11.19 g IDE00435 Particle filter: soot mass measured -0.23 g IDE00436 Particle filter: kilometers since last regeneration 367.5 km Looking at them again, the values had reset for time and kilometres since last regen Research suggests the regen should happen every 483km/300miles, so this was a little early but the fault code has disappeared. I'm still planning to use the cataclean when it arrives, and will likely monitor this over the next few weeks to better understand what is happening.

Can you post a photo?

I'd have a look on eBay for the part, or A5s being broken for spares

Thanks for the links and info. I'm planning to try the cataclean next week when it arrives, so I'll report back. It could be that now the car is moving again, and I've been using Millers Diesel Power Ecomax with every fill (Esso), a bit of crap has been shifted and that's what has thrown the error so just needs a few regens/help to clear.

This is really interesting; thanks for the explanation. What is the measurable I need to look at for the particle trap? Most of my driving to work (3-4 days a week) is 30 miles each way of A roads, and I average 60 mph sticking to the speed limits. Is there a better alternative to the Millers for that? The cataclean should be here next week, at which point I'll be able put it straight in the tank and run it to work.

For anyone looking to do some coding with VCDS, here are a couple of helpful resources: https://www.audiworld.com/forums/audi-a5-s5-rs5-coupe-cabrio-b9-220/***official***-b9-a5-s5-rs5-obdeleven-coding-thread-updated-8-6-2018-a-2954987/ https://www.a5oc.com/threads/complete-vcds-vagcom-mod-list.28600/ The changes I've made so far: Gauge Test/Needle Sweep [17 Instruments] > Coding-07 > Long Coding Helper > Byte 1 > Enable Bit 0 -------------------------------- DRL option in MIB: [09 Central Electrics] > Coding-07 > Long Coding Helper > Byte 2 > Enable Bit 1 -------------------------------- Acoustic Lock/unlock: [46-Central Module] > Coding-07 > Long Coding Helper > Byte 4 > Enable Bit 6 [ 46-Central Module ] > Adaptation - 10 > ENG146368-ENG146488-central_locking_system-beep_at_opening > activate Configure these channels as desired: Lock sounds: ENG146372-ENG146515-horn_settings-number_of_acoustic_acknowlagement_signals_zv_close (default 1 beep) Unlock sounds: ENG146372-ENG146514-horn_settings-number_of_acoustic_acknowlagement_signals_zv_open (default 2 beeps) My car was already set with the corresponding number of hazard blinks to match the sound, so I've left as default. -------------------------------- Does anyone know how to do the following: 1. disable the 'passenger air bag on' warning/chime that is displayed every time the car is started 2. disable the 'engine running' warning/chime every time the drivers door is opened I've got plans to do a few more, so I'll post the outcome.

Has anyone removed and cleaned the EGR valve on a DETA engine? I attempted it yesterday but it looks like there's so much to remove, I abandoned the task. I'm assuming it has never been done on my A5, and at 60k it's likely to be in need of a clean soon, if the build up is similar to my old A4 B8 diesel that I cleaned every 30-40k. Given the effort, I'm wondering if a more frequent "remove a pipe and spray clean" would at least manage the build up, though knowing what it takes to actually clean the valve, I have low expectations. I'm also wondering where the crap goes downstream from the insitu cleaning method e.g. stuck in the CAT? If anyone has some experience to share, I'd be very grateful to learn from it.

Hi Steve, Thank you for the suggestion. I've ordered the cataclean and will report back. My car was running fine, responsive, mpgs were high 70s and no light. I only picked this up from a scan, so it'll be interesting to see if it yields some improvement. Do you know what 'time since last regeneration 4.287 H" means from the first set of measuring block data? Edit: as a side note, I've only had the car for a few months (driven 3k miles), it has full Audi history and I did an oil change after a week, just because. I only use ESSO diesel and put a shot of Millers Oils Diesel Power Ecomax in with every fill up) as I did with my A4 B8 🙂