UPDATED: Reduced Engine Power in Some Ford F-150 Trucks Under Investigation
The National Highway Traffic Safety Administration (NHTSA) has launched an investigation into some model year 2011-2013 Ford F-150 vehicles.
The NHTSA's Office of Defects Investigation (ODI) has received 95 reports alleging incidents of reduced engine power during hard accelerations in the affected Ford F-150 trucks equipped with 3.5L gasoline turbocharged direct injection (GTDI) engines.
Ford has issued three technical service bulletins related to intermittent stumble/misfire on acceleration from highway cruise in humid or damp conditions in some 2011 and 2012 F150 vehicles equipped with 3.5L GTDI engines.
The most recent bulletin, TSB 13-3-3, includes procedures for (1) diagnosing a condition related to moisture accumulation in the Charge Air Cooler (CAC) during extended highway cruising at constant throttle in humid or damp conditions; and (2) repairing the condition by reprogramming the powertrain control module with the latest calibration and installing a new CAC and air deflector plate.
Approximately one-third of the reports received by ODI indicate that the incidents occurred while driving in humid or rainy conditions. Many complaints allege safety concerns associated with overtaking vehicles. No related crashes have been reported to ODI to date.
A Preliminary Evaluation (PE) has been opened to gather information to assess whether the subject Ford F-150 vehicles contain a safety related defect. At the conclusion of the PE, ODI will make a determination as to whether the issue warrants further investigation.
UPDATE: This investigation has been closed. No recall will be issued. For details on the investigation's findings, visit https://www-odi.nhtsa.dot.gov/cars/problems/defect/, reference defect investigation number PE13018.
The closing of this investigation does not constitute a finding by NHTSA that a safety-related defect does not exist. The agency will continue to monitor complaints and other information relating to the alleged defect and take further action in the future if warranted.