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2017 Audi Q7 — no crank with full dash power, then it starts later

TorqueBuyer457Community StarterAug 23, 20262017 Audi Q7 3.0TChicago
2017 Audi Q7 3.0T, about 130,000 miles. Twice I have had full lights and accessories but no crank. After waiting a few minutes it starts normally. Battery terminals look clean. What would you want to measure during the actual failure?
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10 replies

DetailScoutCommunity StarterCommunity StarterAug 23, 2026permalink
This is usually cheaper to test than to guess. Write temp, speed, and in-gear vs coast when the 2017 Audi Q7 does it — then decide on parts. You'll know quickly if you're on the wrong tree. No need to make it theatrical. That's coming from doing this as an owner, not a shop. Not interested in a five-hour wait for a shrug.
FlatSixFanCommunity StarterCommunity StarterAug 24, 2026permalink
Log the conditions before you spend. If a shop can't duplicate it on the 2017 Audi Q7, bring a video plus freeze-frame data, not just a story. Don't erase codes until someone who can help has seen them. On “no crank with full dash power, then,” that was the fork that mattered for me. Stop there until you know. Next check is the cheap one I can do in a driveway.
DailyCamper897Community StarterCommunity StarterAug 24, 2026permalink
Start with the test that can prove you wrong. Get a real battery/charging test on the 2017 Audi Q7, not just resting voltage, before blaming a module. Don't erase codes until someone who can help has seen them. Not gospel, but it saved me a headache. I'll update if anything new shows up.
TireNomad734Community StarterCommunity StarterAug 24, 2026permalink
This is usually cheaper to test than to guess. Capture voltage while the 2017 Audi Q7 is actually failing — after it restarts you've lost the clue. That's the branch I'd chase this week. Keep sale price, fees, and rate as three different conversations. That's coming from doing this as an owner, not a shop. Heat soak after errands is the other window.
FlatSixFanCommunity StarterCommunity StarterAug 24, 2026permalink
Agree — and I'd add this: Move a coil or plug on the 2017 Audi Q7 if it's cylinder-specific and see whether the code follows. Save the big job until that test fails. This is from a 2017 Audi Q7 in Chicago with 130,000 miles. Stop there until you know. Checking again after work.
TrailRoadieCommunity StarterCommunity StarterAug 26, 2026permalink
I hear you, though I'd still want a second check. Swap the cheap/easy piece first on the 2017 Audi Q7 and see if the fault moves. Don't erase codes until someone who can help has seen them. Stop there until you know. I already checked the easy fluid levels.
CleanDad31Community StarterCommunity StarterAug 25, 2026permalink
Asking because it changes the advice: Write temp, speed, and in-gear vs coast when the 2017 Audi Q7 does it — then decide on parts. You'll know quickly if you're on the wrong tree. Was this after sitting overnight? I'd rather look cautious in this thread than stuck later.
WrenchCollectorCommunity StarterCommunity StarterAug 24, 2026permalink
Log the conditions before you spend. Swap the cheap/easy piece first on the 2017 Audi Q7 and see if the fault moves. You'll know quickly if you're on the wrong tree. On “no crank with full dash power, then,” that was the fork that mattered for me. That's the sequence I'd use. Cold start is when I can actually reproduce it.
TorqueBuyer457Community StarterCommunity StarterAug 25, 2026permalink
Cleared nothing. I want service to see the alert on the 2017 Audi Q7 first. Trying not to diagnose from the couch.
TorqueBuyer457Community StarterCommunity StarterAug 25, 2026permalink
It did no crank with full dash power, then twice this week, both times after sitting. No change in mileage feel. Cold start is when I can actually reproduce it.
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