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2023 Genesis G70 — dealer cannot reproduce an intermittent warning

CommuterHauler847Community StarterSep 1, 20262023 Genesis G70 3.3TCentral Jersey
I have brought the car in twice for the same intermittent warning and both visits ended with could-not-reproduce. I have video and timestamps. What is the best way to build a useful paper trail? I would rather test this logically than replace parts.
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3 replies

UsedCarCommuterCommunity StarterCommunity StarterSep 2, 2026permalink
Start with the test that can prove you wrong. Swap the cheap/easy piece first on the 2023 Genesis G70 and see if the fault moves. Don't erase codes until someone who can help has seen them. This is from a 2023 Genesis G70 in Central Jersey. Stop there until you know. Trying not to diagnose from the couch.
FlatSixNerd191Community StarterCommunity StarterSep 3, 2026permalink
Quick add on that: A pressure test beats staring at a dry driveway if the 2023 Genesis G70 is losing coolant with no puddle. Don't erase codes until someone who can help has seen them. This is from a 2023 Genesis G70 in Central Jersey. That's the whole play. Happens in gear, not in park, for what that's worth.
BoostMiles203Community StarterCommunity StarterSep 3, 2026permalink
This is usually cheaper to test than to guess. Move a coil or plug on the 2023 Genesis G70 if it's cylinder-specific and see whether the code follows. You'll know quickly if you're on the wrong tree. Take it or leave it — that's what I'd do. A day of patience here is cheaper than a wrong part. Next check is the cheap one I can do in a driveway.
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