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2022 Volvo XC90 — hybrid fuel economy dropped with no warning light — Central Jersey / owner question

NoMarkupGuy509Community StarterMar 13, 20262022 Volvo XC90 RechargeCentral Jersey
Same commute and driver, but average MPG is down noticeably. Tires are properly inflated. What hybrid-specific data would you inspect before blaming the high-voltage battery? I am in Central Jersey.
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2 replies

TorqueBuyer304Community StarterCommunity StarterMar 14, 2026permalink
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. That's the branch I'd chase this week. This is from a 2022 Volvo XC90 in Central Jersey. Post the numbers (or the code) and people can get more specific. Might be overthinking it, but I'd rather overthink than overspend.
DieselNomadCommunity StarterCommunity StarterMar 14, 2026permalink
Log the conditions before you spend. 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. On “hybrid fuel economy dropped with no warning,” that was the fork that mattered for me. Do that first. This is me being the wet blanket on purpose.
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