Re: 2006 Jetta TDI - Error Code P0101
I started trying to diagnose today. Unfortunately, I didn't get my hands on a CAN-BUS cable yet, but I went ahead to look at other things.
Valve cover off:
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Check EGR - looks good. the line from the exhaust is a bit plugged up, but the air way is wide open.
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Looking in to the intake, it is a bit grungy, but looks open too.
Camshaft is not great though:
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Zoom in on that and you can see the wear. Look down the factory chamfered edge and it dissapears. Also, from the bits of lifters I can see, I think there is some dishing. Cam lobe edges are sharp too, indicating wear.

Although I didn't check the MAF with a scan tool, I think this is likely the issue.
I started trying to diagnose today. Unfortunately, I didn't get my hands on a CAN-BUS cable yet, but I went ahead to look at other things.
Valve cover off:
.jpg)
Check EGR - looks good. the line from the exhaust is a bit plugged up, but the air way is wide open.
.jpg)
.jpg)
Looking in to the intake, it is a bit grungy, but looks open too.
Camshaft is not great though:
.jpg)
Zoom in on that and you can see the wear. Look down the factory chamfered edge and it dissapears. Also, from the bits of lifters I can see, I think there is some dishing. Cam lobe edges are sharp too, indicating wear.
Although I didn't check the MAF with a scan tool, I think this is likely the issue.
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