Honda Element 2005 engine light on and off

What is your question?

Honda Element 2005 engine light goes off and on, no flashing light. A mechanic gave me code nr: PO325. The car serial nr : 5J6YH286X5L020546. Going uphill seems to be somewhat more effort.The mileage of the car is 157000 km. Went to garage for testing and it is possibly dirty spark plugs? Thank you for your reply

What makes this problem better or worse?

The light goes off and on at random

How long has your 2005 Honda Element had this problem?

9 days