DTC 1491 AND P0328

2003 Nissan Frontier

Computer problem
2003 Nissan Frontier 6 cyl Two Wheel Drive Automatic 112000 miles

I got the " service engine soon" light came on this morning, I noticed a weird smell coming from the engine as well, I went to Autoparts and the check the DTC codes and got P1491 and P0328, does someone knows what does these codes mean
December 1, 2009.

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