One problem related to mass air flow sensor has been reported for the 2006 Nissan Titan. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Nissan Titan based on all problems reported for the 2006 Titan.
I own a crew cab le. Check engine light came on 2 months after ipdm was replaced. I took it to Nissan dealer and they did a diagnostic. They recommended to replace mass air flow sensor and recheck. The part is $273. 38 and it is not covered by the warranty. The truck had 30,000 miles at the time of diagnostic. I paid out of pocket to replace part.