Live Data
Last reported case: 4 weeks ago
Based on 3 owner reports (3 from Reddit)
What is P0171?
🚗P0171 on 2010 TOYOTA Corolla
This page focuses specifically on P0171 issues reported by 2010 TOYOTA Corolla owners. The experiences and fixes below are from real owners of this exact vehicle.
Symptoms Reported by 2010 TOYOTA Corolla Owners:
vacuum leakscheck engine light
Parts Often Involved:
o2 sensorthrottle bodymaf sensorcheck engine lighthosepcv valvedownstream
What Owners Say
Real experiences from 2010 TOYOTA Corolla owners
Warningvia reddit_post
“The car had a lean code specifically P0171 and I changed the MAF and the upstream o2 sensor replaced. But I'm still getting an o2 sensor fault the upstream is 3.8 volts and the downstream is 0.5 or 0.05 (I can't remember).”View original
Warningvia reddit_post
“But I'm still getting an o2 sensor fault the upstream is 3.8 volts and the downstream is 0.5 or 0.05 (I can't remember). I'm just trying to figure out if the voltage is are okay.”View original
Experiencevia reddit_post
“Vacuum leaks I’m missing, throttle body, O2 sensor, fuel pressure, or something common on these cars? I’d appreciate any direction before throwing more parts at it.”View original
Experiencevia reddit_post
“I’m dealing with a P0171 (system too lean) on a 2006 Toyota Corolla 1.8L and I’m honestly exhausted. So far I’ve:”View original
These are real experiences shared by 2010 TOYOTA Corolla owners on automotive forums and communities. Results may vary based on vehicle condition and repair quality.
About This Data
This page aggregates 3 discussions about P0171 from 2010 TOYOTA Corolla owners across automotive communities.
Success rate (0%) is calculated from posts where owners confirmed whether their fix resolved the issue.
Last updated: 12/22/2025