Case Study: P0420 on a 2021 Ford F‑150
ResolvedDriver reported a Check Engine Light with reduced fuel economy. AI identified likely O2 sensor vs. catalytic converter issue.
- • Guided OBD‑II code reading and live data checks
- • Recommended downstream O2 sensor inspection first
- • Provided compatible part numbers and torque specs
Outcome
- • Time saved: ~2.5 hours
- • Cost saved: ~$220 vs. shop diagnostic
- • Confidence: 95%