mjcb5s4

The car is running great, however I am currently throwing a couple codes.

These two codes listed below have been thrown since I swapped ECUs from a stock J box to a GIAC L box. I am pretty sure that this can be corrected with some soft coding, but I haven't been able to find any reference. Does anyone know if/how this can be corrected with VAG-Com? No issues with braking. When cleared these two immediately return.

17837 - Circuit for Brake Vacuum Pump: Open Circuit
P1429 - 35-00 - -

18320 - Pressure Sensor for Brake Boost (G294): Short to Plus
P1912 - 35-00 - -


I am slightly concerned with this code. I have searched and I have not found anything conclusive. Some say that it is due to intake leak or MAF reading, others say that it is a bad primary O2 causing the secondary O2 to be used for lambda correction, and others say that it is only bad secondary O2 readings.

17584 - Bank1: O2 (Lambda) Correction Behind Catalyst: Control Limit Reached
P1176 - 35-00 - -

Any insight, advice or suggestions are greatly appreciated. Thank you.

conall

My reader says P1176 is MAF related,
and P1429 - auxilliary emission controls.
But it say P1912 is a "Manufacturer control transmission"??

mjcb5s4

Thanks for the reply. What code reader are you using? The ones listed are straight from VAG-Com. Anyone have any experience with these codes?

conall

It's an Actron CP9125.
My independent mechanic says it is a fairly good reader, although better readers would cost much more.