There are 2 stored owner reports matching the engine leading-label group for the 2016 Ford F-550 in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)The contact called on behalf of the owner of a 2016 Ford F550. The contact stated that while one of the employees was driving 30 MPH and making a turn, a diesel fuel-burning odor was coming from the engine and entered the inside of the cabin through the A/C vents. No warning lights were illuminated. The driver was three hundred feet away from the business and continued to drive up to the business. The driver exited the vehicle and noticed oil dripping from underneath the vehicle. The driver opened the hood and noticed diesel fuel all over the engine. Upon further investigation, the driver noticed that the plastic drain valve on the bottom of the water separator was cracked, and oil was spewing upwards into the engine. The company mechanic repaired the vehicle on-site by replacing the filter. The driver was able to continue driving the vehicle. The manufacturer was not notified of the failure. The failure mileage was 85,006.
The contact owns a 2016 Ford F-550. The contact stated while operating the vehicle, the check engine warning light illuminated and remained illuminated. The vehicle was taken to the local dealer who replaced NOX sensor, but the failure persisted. The cause of the failure was not yet determined. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was 83,000.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: May 4, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.