budgie55

Finally managed as of start of this week get my car back. Was the alternator, not sure what they did to discuss with Audi UK (given it wasn't flagging fault codes post me wiping the first lot with VAGCOM (facepalm)) but it was all replaced free of charge. Shout out to Adam at Audi Bolton who actually was proactive eventually in getting it sorted and working around the "computer says no" piece. Hope you get sorted Alrawis quickly and with as little fuss as possible.

Great to hear that your problem is resolved. Best of luck with Audi in respect of getting some cash back. It was Bolton Audi which I have been dealing with. Despite initial concerns and having to go in and make a bit of a scene, once we had got through that Adam (their mechanic / tech) was very good and got it sorted (hopefully waiting for return later this week!).

I hope it resolves the issue for you once and for all. Not to rub salt in wounds but I've also been having fun and games, went in to dealership to confront them, ended up taking car for my own drive and as expected it died and had to get recovery back to the dealership (not my most fun day off work haha). Told them I wouldn't be taking it anywhere until they fixed it. One of their techs to be fair to him pulled out all the stops with Audi UK, using my own logs from VAGCOM with the original faults which wouldn't replicate on the starter generator, they eventually agreed to replacing it. So hoping to have it back by the end of the week or Monday next. Fingers crossed it repairs the issue. Been quite stressful as they wouldn't even take to extended warranty without the starter generator issuing a fault code. God knows what you do if it never faults, the car would only drive 5 miles or so before dying, so would have ended up with a £30k plus car that was useless (alternative I guess would have been to take to an independent).

I’ve used Audi extended, to be fair the guy I spoke to this morning re my issues was very helpful. Never had to use them before, car is late 2018 Q7 30k miles and I want for the all compenent cover with £250 excess, cost was £425 ish from memory. North West UK, hope that’s useful. Should apologise as just realised I’ve been posting on the A7 forum with my Q7 alternator woes 😄

So sorry to hear of your frustrations, expense and troubles. These cars nowadays are just too complex, once upon a time if your car was draining battery and failing they would either replace battery, alternator, or find what is causing the drain. Now it is just whatever the computer tells them. I mean what if the generator / alternator is faulty and doesn't log any fault code ever, do you just have a £50k plus (or more) car you simply can never drive more than 20 miles or so. Madness. Hope you get sorted one way or another, ideally without any more cost to you!

Yeah I had the stop / start fail first time around, guess that fault code cleared too. Only likely not come back on as I charged the 12v for 2 days before taking to garage. I have no idea what they expect me to do. I may take Friday off work and go and drive round their car park aircon on full, full beam on until it dies 😄 I took a dump of the first faults which I cleared, before I knew of the TSB and the issues with the MHEV and the alternator. The error codes and messages are all there from the TSB, which I’ve provided to Audi Bolton. They can’t use the VAGCOM file though I guess as evidence grrrrr

Update day 4: They can't replace alternator either under Audi UK TSB (as noted in this thread 2 August), or under my extended warranty as the alternator is not displaying a fault code.... No fault code on the alternator (my fault from initial problem as I cleared the codes), despite them driving the car (unknown if driven until it stopped again due to no 12v battery power) faults not re-appeared. Despite 17 other faults relating to: Engine - 2 faults voltage supply inadequate and engine failed to start (when I got the red stop asap warning and car packed in on the drive due to dead battery) HVAC (aircon) blower output reduction due to energy management Databus fault in central electrics Battery regulator - DC/DC converter - inadequate performance (fault priority 2 in VAGCOM - immediate service appointment) Steering assist - Due to insufficient voltage All the child lock motors on rear doors flagging error codes Can gateway - 6 faults including Battery Mgmt 2 with various 48v activation restrictions / Generator fault (electrical malfunction) / 12v electrical system - failure (stage 1 and stage2) / and Energy Management active (presume due to poor 12v battery voltage) Not quite sure where to go from here, if alternator never flags a fault code then what do you do; clearly there is a fault creating all the other faults above. Other than to drive the car around until it fails again and hope it flags a fault code on the generator (or buy a new alternator myself). Absolute madness, lesson to self never clear fault codes EVER AGAIN. ...... may go and drive the car round their carpark tomorrow until it packs in. 😞

Update: Day 2 with Bolton Audi. Call on Friday last week to say they needed car longer to get a serial number from the alternator (not convinced of this). No call today so rang them up, no fault codes for the alternator on the car (despite umpteen other warnings DC/DC inverter being one of many saying "inadequate performance" in VAGCOM). Asked me if I wanted to come and pick car up, errrr no thanks it has yellow lights saying bring in to workshop due to electrical fault, "what would you normally do to clear all the errors and fix the car"? Unfortunately Audi UK want specific fault codes and unfortunately (my lesson learned), I cleared the codes the first time the warning came up, specific code first time around in VAGCOM was per below. Now no fault code on starter generator, so Audi UK won't replace. Anyway, going to test on the road tomorrow as I said I don't want it back until fixed..... no doubt they will break down somewhere and have to tow it back in *sigh*. Wait and see what tomorrow brings! First error (before clearing) associated with Alternator: Address CC: Starter-Generator (----) Labels:* None Part No SW: 4N0 903 028 H HW: 4N0 903 028 H Component: BSG-HP1-65 H16 0523 Serial number: 03081800020231 Coding: 28000000000000 Shop #: WSC 31414 790 00001 ASAM Dataset: EV_Start48VAU651 001006 ROD: EV_Start48VAU651_001.rod VCID: 303910DDCAA0AD5ABFB-8064 1 Fault Found: 21798 - 48V Electrical System P136C 00 [108] - Voltage too High Intermittent - Confirmed - Tested Since Memory Clear Freeze Frame: Fault Status: 00000001 Fault Priority: 4 Fault Frequency: 1 Reset counter: 227 Mileage: 46772 km Date: 2024.08.18 Time: 15:23:59 Temperatures-Temperature of processor circuit board: -50.00 °C Temperatures-Stator temperature: 23.20 °C Temperatures-Coolant temperature 1: 25.60 °C Temperatures-Coolant temperature 2: 26.80 °C Temperatures-Temperature of speed sensor: NOT-DEFINED No error now on starter generator: 😞 Address CC: Starter-Generator (----) Labels:* None Part No SW: 4N0 903 028 H HW: 4N0 903 028 H Component: BSG-HP1-65 H16 0523 Serial number: 03081800020231 Coding: 28000000000000 Shop #: WSC 31414 790 00001 ASAM Dataset: EV_Start48VAU651 001006 ROD: EV_Start48VAU651_001.rod VCID: 303910DDCAA0AD5ABFB-8064 No fault code found. However.... quite a few on battery regulator, CAN Bus, and DC/DC converter: Address 19: CAN Gateway (J533) Labels:* None Part No SW: 8W5 907 468 G HW: 8W5 907 468 G Component: Gateway H43 0135 Revision: 8A000003 Serial number: 0388A578418724 Dataset Number: 4M0909515P 0091 Coding: 02010001000486407396000000590032C89A0007180000000175078E10000000 Shop #: WSC 31414 790 00001 GVL: 01503C040804020042BC08000002C80011082010000000000000000000000000 ASAM Dataset: EV_CGateCONTIAU491 003150 ROD: EV_CGateCONTIAU491_003_AU49.rod VCID: 4DC76929BD52E0B2B4D-8018 Multifunction steering wheel control module: Subsystem 1 - Part No SW: 4M0 951 523 HW: 4M0 951 523 Component: J453 MFL H06 0004 Serial number: 20180710070907 30226 Battery Monitoring Control Module: Subsystem 2 - Part No SW: 8S0 915 181 C HW: 8S0 915 181 C Component: J367-BDMHella H10 9070 Serial number: 2628248504 6 Faults Found: 9502726 - Battery Management 2 C124F F0 [008] - Sequence Error during Operating Mode Selection [BMS_OPM_Failure] Intermittent - Confirmed - Tested Since Memory Clear Freeze Frame: Fault Status: 00000001 Fault Priority: 4 Fault Frequency: 14 Reset counter: 229 Mileage: 46772 km Date: 2024.08.19 Time: 14:04:11 48V activation restriction-Airbag control module: not active 48V activation restriction-Engine Electronics: not active 48V activation restriction-Roll stabilization: not active 48V activation restriction-48 V activation restriction due to open circuit: not active 48V activation restriction-48 V activation restriction due to deactivation: not active 48V activation restriction-Battery management 2: active 48V activation restriction-Voltage converter: not active 48V activation restriction-Auxiliary Air Heater Control Module/PTC: not active 48V activation restriction-Electrical compressor: not active 9502763 - Engine Control Module B106D F1 [008] - Sequence Error during Operating Mode Setting [MVK_MSG_OPS_Error] Intermittent - Confirmed - Tested Since Memory Clear Freeze Frame: Fault Status: 00000001 Fault Priority: 4 Fault Frequency: 3 Reset counter: 229 Mileage: 46772 km Date: 2024.08.20 Time: 08:27:24 48V activation restriction-Airbag control module: not active 48V activation restriction-Engine Electronics: not active 48V activation restriction-Roll stabilization: not active 48V activation restriction-48 V activation restriction due to open circuit: not active 48V activation restriction-48 V activation restriction due to deactivation: not active 48V activation restriction-Battery management 2: active 48V activation restriction-Voltage converter: not active 48V activation restriction-Auxiliary Air Heater Control Module/PTC: not active 48V activation restriction-Electrical compressor: not active 8526354 - Generator P1B01 00 [008] - Electrical Malfunction Intermittent - Confirmed - Tested Since Memory Clear Freeze Frame: Fault Status: 00000001 Fault Priority: 4 Fault Frequency: 3 Reset counter: 229 Mileage: 46772 km Date: 2024.08.19 Time: 13:57:50 Generator voltage: 10.6 V Battery voltage: 12.020 V 8519684 - 12V Electrical System C11CB 01 [008] - Electrical Failure Intermittent - Confirmed - Tested Since Memory Clear Freeze Frame: Fault Status: 00000001 Fault Priority: 4 Fault Frequency: 3 Reset counter: 229 Mileage: 46772 km Date: 2024.08.20 Time: 08:29:19 12-Volt Vehicle electrical system: malfunction status: Stage 1 8519685 - 12V Electrical System C11CB 01 [008] - Electrical Failure Intermittent - Confirmed - Tested Since Memory Clear Freeze Frame: Fault Status: 00000001 Fault Priority: 4 Fault Frequency: 1 Reset counter: 229 Mileage: 46796 km Date: 2024.08.20 Time: 18:10:14 12-Volt Vehicle electrical system: malfunction status: Stage 2 8519683 - Energy Management Active U140B 00 [008] - - Intermittent - Confirmed - Tested Since Memory Clear Freeze Frame: Fault Status: 00000001 Fault Priority: 6 Fault Frequency: 6 Reset counter: 229 Mileage: 46784 km Date: 2024.08.20 Time: 08:49:17 EM_vehicle_state: 00 00 Static current shut-off stage: Deactivation stage 3 Auxiliary heater activation restriction request-Parking heater: Permitted Auxiliary heater activation restriction request-Allowed parking heater runtime: 0 min Address 61: Battery Regul. (J1120) Labels: 4M0-915-105.clb Part No SW: 4M0 915 105 B HW: 4M0 915 105 B Component: BMS_48V_LiIon H06 0108 Shop #: WSC 00000 000 00000 ASAM Dataset: EV_BMS48VLiIonLGAU536 001001 ROD: EV_BMS48VLiIonLGAU536_AU37.rod VCID: 2809F8BDF270E59A67B-807C 1 Fault Found: 32772 - DC/DC Converter P0A94 00 [047] - Inadequate Performance Confirmed - Tested Since Memory Clear Freeze Frame: Fault Status: 00000001 Fault Priority: 2 Fault Frequency: 1 Mileage: 46772 km Date: 2024.08.19 Time: 13:57:50

Dropped car off (made it after a 12v charge) at Audi Bolton this morning. Explained to guy problems, he seemed to know about Audi UK paying for 90% of the alternator failures, and seemed a bit disinterested with what I told him to be honest. I get that they need to diagnose themselves etc and probably hear stories all the time about what people have read on internet. Anyway wait and see what they come back with today; slightly annoyed with myself at initially clearing first faults with vagcom, but it failed completely around a week ago, so hoping fault codes reappeared. Lesson to self to never clear them going forwards. Fingers crossed and will keep updated on progress.

Sorry to hear your troubles Nik, keep us updated as I’m interested for sure. Mine only due to go in to Audi Bolton this Friday (waiting for a slot) so currently sat on drive. Will give the 12v a charge night before Friday, and hope I can get to the garage without breaking down. Hope you get yours sorted.

Thanks for that, wasn’t aware the voltage converter also needed swapping out ….. eek. Makes the £500 worth of warranty extension with Audi hopefully feel warranted (no pinup intended). Lots of expense for the sake of meeting emissions standards for the end user isn’t it 😞 So sorry to hear of your experience and expense too, hope you get sorted and can fall in love with the car again once it is fixed.

Cheers DADSQ7, 12 miles will get me to the garage which is around 9 miles or so away which solves one problem. When I checked the lithium battery yesterday it was around 50%, that may have moved today. Don’t want to run down the lithium as they’re damn expensive to replace so I hear. Am I right that once the 12v is charged, the car will / may also charge the LIPO up further or is that just an urban myth? Presume there would need to be some sort of DC/DC converter involved (which I believe the cars have)?

Ah well, 2018 (68 uk plate) Q7 here 29,000 miles just had yellow warning yesterday electronics failure take to workshop. Booked in to Bolton Audi but 1 week this coming Friday; took my chances and drove to work today, car failed with red lights, power steering etc going as I pulled on the drive at home thankfully. Car now won’t start so charging 12v battery. Hooked up to VAGCOM and have the alternator issue so pretty sure it is the same issue, no idea if it will be covered by any recall given UK not recalled yet. But thankfully have Audi extended warranty, only issue now is how to get the car to the dealers?! One for the morning…. Pretty disappointed in this car since I had it from nearly new and will likely be my last Audi after owning several now.