NHTSA Complaint #11559310 — 2018 HONDA ACCORD

The vehicle has been giving a check engine light and a litany of other warning lights including: electric power steering system problem, brake system problem, forward collision mitigation braking system problem, tire pressure monitoring system problem, adaptive cruise control system problem, traction control system problem. This issue happened intermittently at first including the warning lights, then constantly beginning about 3 weeks ago. The check engine light produced a P0304 code indicating a misfire on cylinder 4. The vehicle on cold start would idle rough indicating the misfire and idle at a higher RPM than normal. The vehicle would return to idling normally after approximately 15 minutes of warming up however all the lights would stay on. The vehicle felt like it was down on power, was running rough, and could go into limp mode at any time while the issue was present and significantly reduced the driveability and all of these other warning lights were on indicating potential problems with those systems. I had the vehicle inspected by a Honda dealership and two different master technicians have diagnosed it as a fuel injector issue, although they thought it could have been a head gasket issue as well and in fact have not ruled that out entirely at this point. This is a known issue with this vehicle shown by AHM putting out a request for parts from 2018-2019 1.5 Liter engine Accords affected by a P030X (Cylinder 1,2,3, or 4 misfire) code back in April.