Some 2019-2022 Ford Ranger vehicles may exhibit a MIL on with DTC P0300, P0301, P0302, P0303, P0304 and/or P0316 stored in the PCM.
This may be due to water buildup in the spark plug wells and corrosion on ignition system components. This may be the result of the engine appearance cover not being installed. Locate the two engine appearance cover mounting bosses on the valve cover.
Make sure that the engine appearance cover stud bolts are installed to the valve cover. Tighten these to 89 in-lb.
Lubricate each grommet on the engine cover with silicone brake caliper grease and dielectric compound to aid in cover installation.
Install the engine cover. Install the two stud nuts and torque to 89 in-lb. The engine appearance cover kit is available as P/N L1MZ-6A949-C.