FORD · 2019-07-25
Some 2017-2019 F-Super Duty vehicles equipped with a 6.7L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P1291, P1292, P0191 and/or P06A6. This may be due to an engine harness chafe on the powertrain control module (PCM) bracket. Before completing Powertrain Control/Emissions Diagnosis (PC/ED) Manual pinpoint tests, follow the Service Procedure steps.