NHTSA Complaint #11692460 — 2017 HONDA PILOT

In August 2022, with approx. 92,000 miles, my 2017 Honda Pilot received fuel injector replacement and a PCM update under Honda TSB 20-100, performed by Schaumburg Honda. This Technical Service Bulletin is known to have downstream impacts on emissions systems if the root cause is not fully corrected. On August 13, 2025, at 134,045 miles, the vehicle triggered a P0430 code (“Bank 2 Catalyst Efficiency Below Threshold”). Schaumburg Honda again replaced the injectors. Less than a month later, on September 8, 2025, at 135,101 miles, the vehicle triggered a second emissions code, P0420 (“Bank 1 Catalyst Efficiency Below Threshold”). Schaumburg Honda informed me that both catalytic converters had now failed and quoted over $5,800 in replacement costs. This sequence of events strongly suggests a long-term emissions defect potentially caused by unresolved impacts from TSB 20-100. American Honda denied goodwill assistance based on mileage, despite the clear connection to prior manufacturer-directed service. I have purchased several vehicles from this dealer over the years and have maintained all service through authorized Honda service centers. This raises safety and environmental concerns due to the catalytic converter failure, and may indicate a systemic issue tied to the TSB.