Owners of 2013-16 Accords or 2015-16 CR-V trucks (all with four cylinder engines) may come into your store with an illuminated Check Engine light and trouble codes P0335 and/or P0339 stored in computer memory.
One likely cause for the trouble, reports Honda, is a weak or intermittent input signal from the crankshaft position sensor to the PCM. Corrosion between the engine wiring harness and the sensor's connector is the ultimate villain. Installing a new-design crank sensor, crank sensor O-ring and engine harness should eliminate the problem. Order part #37500-R60-U01 for the new sensor and part #91333-PNC-006 for the O-ring. There are a multitude of different engine harnesses available depending on the year, model and transmission type, so check with a dealer for the specific part number of the vehicle in your service bay.
Note: As shown in the illustration, the crank position sensor is protected from road debris by a stiff cover with two retaining bolts. To gain access to the sensor, loosen one bolt and remove the other, then lift the cover out of the vehicle.