2022 Volvo XC90 — coolant slowly disappears without an obvious leak

If it were in my driveway, move a coil or plug on the 2022 Volvo XC90 if it's cylinder-specific and see whether the code follows. Don't erase codes until someone who can help has seen them. That's the sequence I'd use. Cold start is when I can actually reproduce it.

Ask what changed right before it started. A pressure test beats staring at a dry driveway if the 2022 Volvo XC90 is losing coolant with no puddle. If the cheap test changes it, stop and reassess. Not gospel, but it saved me a headache. I'm in no rush to be a hero on it.

Intermittent stuff lies if you only catch it once. If a shop can't duplicate it on the 2022 Volvo XC90, bring a video plus freeze-frame data, not just a story. If the cheap test changes it, stop and reassess. On “coolant slowly disappears without an obvious leak,” that was the fork that mattered for me. That's the sequence I'd use. If your situation is the opposite, ignore me. This is me being the wet blanket on purpose.

I wouldn't throw parts yet. Write temp, speed, and in-gear vs coast when the 2022 Volvo XC90 does it — then decide on parts. If the cheap test changes it, stop and reassess. Stop there until you know. Worth doing even if the car feels fine right now. If that fails I'll eat the diagnostic fee.

I'd want a measurement, not a hunch. A pressure test beats staring at a dry driveway if the 2022 Volvo XC90 is losing coolant with no puddle. Don't erase codes until someone who can help has seen them. This is from a 2022 Volvo XC90 in Washington DC. Had a similar mess a couple years ago and that's what finally sorted it. Next check is the cheap one I can do in a driveway.

This is usually cheaper to test than to guess. Move a coil or plug on the 2022 Volvo XC90 if it's cylinder-specific and see whether the code follows. Don't erase codes until someone who can help has seen them. When does it actually happen? I'll update if anything new shows up.