A few nights ago my engine cut out during driving, and I've not been able to start it since. When trying to start I get a loud click from the lower rear right side of the engine (starter area?) and my dash, MMI, lights all go out before coming back on after a second.
Video upload taken from roadside on the night:
I've ruled out battery as have tried 2 more including a brand new one... Jump starting from another car had exactly same outcome regardless if we jump to battery or under bonnet points. I've checked all of the fuses except for the ones under the ECU in engine bay which I will do shortly... Also checked all grounds in back by battery, engine bay, heads, near starter by front right tyre, etc... Battery isolator switch in boot is also good.
Car has been sat for 3 or 4 days, oil from dipstick looks clean but smells slightly of fuel, oil was changed twice including engine flush about 1000 miles ago during a recent engine out job that cost me an arm and a leg for a whole timing chain kit, pcv, supercharger cooler and engine mounts amongst other things....
Nothing I can see looks out of order, no damage to aux or sc belts, no leaks or smells or anything obvious, no melted cables, electrical connectors all seated, and all electronics are functioning as normal except when trying to start the engine.
Car is a 2010 B8 S4 3.0T at 87k miles and has been meticulously looked after (I have literally 100s of receipts), oil changes at 5k with Millers NT+ 5w40, MRC Stage 2 since 35k miles- car has never missed a beat in the 25k miles I've driven it including 40c summer through Europe or below freezing start ups. I always log via Torque pro during driving, and the log shows absolutely nothing out of the ordinary, no major DTCs reported by Torque either...
After losing power and failing to restart the engine I immediately scanned for DTCs and 5 came up, all electrical related so I'm really really hoping this is not going to be a trashed engine right after having paid for work costing me about enough for a replacement... I cleared codes but still unable to start, unsurprisingly codes have not returned:
Code:
============1============== 0471 Raw code: 01D7 ECU: 19. CAN Gateway Status: Test conditions are met, Validated and stored in non volatile memory Audi: Electronic damping control unit EGD-J250; Control unit for EGD electronically controlled damping-J250 ============2============== 0446 Raw code: 01BE ECU: 03. ABS control unit Status: Pending fault present during this driving cycle, Validated and stored in non volatile memory Audi: B105000: Function limitation due to excessive temperature Audi: Work restriction due to insufficient voltage; Functional restriction due to undervoltage ============3============== 0955 Raw code: 03BB ECU: 05. Authorization system for access and starting the engine Status: Pending fault present during this driving cycle, Validated and stored in non volatile memory Audi: Key 1 ============4============== 0446 Raw code: 01BE ECU: 14. Email system Damping controls Status: Pending fault present during this driving cycle, Validated and stored in non volatile memory Audi: B105000: Function limitation due to excessive temperature Audi: Work restriction due to insufficient voltage; Functional restriction due to undervoltage ============5============== 0471 Raw code: 01D7 ECU: 55. Headlights corrector Status: Test conditions are met, Validated and stored in non volatile memory Audi: Electronic damping control unit EGD-J250; Control unit for EGD electronically controlled damping-J250
I'd really appreciate any help!
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