I just replaced all my belts, hoses, water pump, thermostat and after completing the work I had to adjust the belts, I disconnected the air cleaner box and the wiring to the sensor by the Mass flow sensor and now the check engine is on! I reassembled the system but the light is still on, is there a way to clear the check engine light?

Appreciate your assistance.

It'll go off in a couple days, or you can disconnect the battery overnight.

Make sure your MAF plug / wiring is perfect, that's a common problem on the Pathy / QX4.