dont know if the two are related, but the little yellow man with the air bag looking thing came on my dash today for the first time ever. pulled code p0541 but this code may not be related. i havent checked codes in 9,000 miles when we installed the new engine. anyways, replaced the intake heater relay. didnt help. swapped out heater on one of my other trucks. didnt help. any ideas and are the two issues related???