I have a 2004 996TT. My check engine light came on. The error code read P1109. What does this mean? What could be causing this? Thanks.

 

P1109 Input variables, charge measurement - above limit
Possible fault cause
- Heavily soiled throttle
- Throttle adjusting unit faulty
- Mass air flow sensor faulty

Clean MAF - Suggested below

https://www.6speedonline.com/forums/...about-diy.html

 

Here you go: Looks like a MAF. Did you recently install a NEW "Oily" Air Filter?

I would try at least cleaning the MAF First.

P1109:

Input variables, charge measurement - above limit

Points to:

1) Heavily Soiled Throttle
2) Throttle Adjusting Unit Faulty
3) Bad MAF.

SWR

 

Thanks for your help. I have the Hitachi MAF. It was installed about 6 months ago. I am going to clean it. What do you guys recommend that I use to clean it. Thanks

 

Not sure if all the pics are still there, but this is what I used.

https://www.6speedonline.com/forums/...-cleaning.html