Intake Grid Heater, Grid Heater Relay
2012 - 2016 6.7L Cummins engines with Intake Heater issues or DTC P2609 and
P0542, please replace the Intake Heater Grid and Relay as a set. 68210071A$
(heater grid) and 05187880A$ (relay). Inspect electrical cable between the heater
grid and relay for signs of possible overheating. Replace cable as necessary.