Like many others, I am chasing the culprit of the p0299 code on a 2005 BEW Jetta TDI.
I have replaced the N75, the VW shop has replaced the boost pressure sensor and test
drove with no codes. I have replaced the turbo hose with the dog collar and a few
vacuum lines.
I was content for a couple days of normal driving on flat roads at varying speeds. But
when I take it on the highway and proceed up long hills the limp mode is initiated and CEL
comes on after next time I turn the car on.
I read if removal of mass air flow sensor improved driving, this would be the problem.
The computer senses a missing MAF and uses a medium value to run with. I drove around
for 4 days with it disconnected and never had an issue besides a slight reduction in power.
Sweet!
So I replaced the mass airflow sensor and drove around all week. Everything ran great until
the uphill highway monster struck going to the mountains. Again I pulled the MAF, clear the
p0299 code and she ran good.
I guess its back under :dunno with a can of wd40 or starting fluid to see if I missed a vacuum leak but
thought I would ask.
I have replaced the N75, the VW shop has replaced the boost pressure sensor and test
drove with no codes. I have replaced the turbo hose with the dog collar and a few
vacuum lines.
I was content for a couple days of normal driving on flat roads at varying speeds. But
when I take it on the highway and proceed up long hills the limp mode is initiated and CEL
comes on after next time I turn the car on.
I read if removal of mass air flow sensor improved driving, this would be the problem.
The computer senses a missing MAF and uses a medium value to run with. I drove around
for 4 days with it disconnected and never had an issue besides a slight reduction in power.
Sweet!
So I replaced the mass airflow sensor and drove around all week. Everything ran great until
the uphill highway monster struck going to the mountains. Again I pulled the MAF, clear the
p0299 code and she ran good.
I guess its back under :dunno with a can of wd40 or starting fluid to see if I missed a vacuum leak but
thought I would ask.