New MAF but,,,New CEL

Took the car to the dealer for 60k service. They called & suggested a new MAF was needed to increase power. Quote for installed MAF was $ 475. Said no. Purchased a new part (TDI MAF) & installed in 5 minutes.
Increased power is amazing! But after 2 days the CEL( my first) appeared about 30 seconds after start & does so every time.
Starting to worry if it’s damaging the car w/ CEL lit. Really don’t want to take to the dealer since I put the MAF in myself.
Any help would be great.

2000 Jetta Black 5 sp.

You should hook up with someone in your local area (Lightman??) that has VAGCOM so the DTCs can be read and you can determine what your car is trying to tell you.

What kind of air filter do you have?

The car is all stock. 100% dealer maintained.
Thanks for the post.

dealer maintained? that why it gets a cel, it doesnt like the dealer!! haha

It would be best to pull the codes and see what's up, but if your power is still there, it's not likely to be the MAF.
Glow plug wiring harness fault is a common intermittent code that shows up.