OK, so I'm experiencing serious boost issues.

My MAF readings are very low and the timing is being retarded. What is causing this?

Thanks!

 

well if the MAF was shot it would automatically alter the timing to compensate for fuel air mix, what codes/ is the CEL on

 

only code is B1 S2 Oxygen sensor

ordered the replacement...that is causing a CEL...but there are no other codes.

If the MAF was dirty/faulty and was causing a timing retard....would it throw a code?

 

the maf would throw a code and a bad o2 sensor would cause the same problem (B1 S2) not seen these codes before you must be using some other type diagnostic machine??

 

I think you need it checked out with VAG to pinpoint the problem you could be wasting money, advice only

 

Im using a VAG-COM. Im getting 2 codes and a CEL. The codes are:

B1 S2 Lambda Sensor Open Heater Circuit
B1 S2 Lambda Sensor (cant remember the rest)

anyway i concluded it was a faulty heater in the sensor, so i ordered a replacement. The replacement will solve these 2 codes and the CEL. Will it also fix the issue im having with the MAF reading/timing retardation/boost issues?

 

the o2 sensor informs the ecu of the problem and will do what its designed to do (compensate) but I think your on the right track HOS2 BANK 1 refers to the second o2 sensor nearest the cat that on the side where cylinder 1 is

 

B1 = bank 1 and S2 = the second or precat heated o2 sensor

 

Yeap i know. I ordered the sensor already. Should ship out today.

The heater has an open loop on a resistance test. Could this lead to boost problems caused by low MAF readings--->retarded timing?

basically im asking, is it posible for all of this to be related? Or is the boost problem a seperate issue?

 

yes its related and only when you fit the new sensor will it show, check the wires on the o2 sensor they could be damaged so the o2 sensor is not heating up hence the open circuit