I have been fighting this very issue on my 06 Vibe Base. It seems I have to keep replacing the MAF Sensor every 6-8 Months. (Thankfully a lifetime warranty) It's good for half a year, then right back to the same P0171. I chased the problem for months back in 2024. Replaced the Fuel Pump Assembly, ne...

Hey what's up? Do you by chance have the grey plastic A Pillar piece for the passenger side? Run's from the roof to the base of the windshield/dashboard. My old one had a broken slot that the retaining clips slide into.