Code diagnosis

After a few weeks of trouble free driving, my '04 PD went into limp mode this morning -- no MIL, but there were 3 codes:

Tuesday,09,October,2007,11:13:38:23653
VAG-COM Version: Release 704.1

Address 01: Engine
Control Module Part Number: 038 906 016 H
Component and/or Version: R4 1,9L EDC G000SG 5675
Software Coding: 0150031
Work Shop Code: WSC 00066
3 Faults Found:

16792 - EGR Potentiometer (G212): Signal too High
P0408 - 000 - -
Freeze Frame:
RPM: 2058 /min
Torque: 92.0 Nm
Speed: 14.0 km/h
Temperature: 82.8°C
Voltage: 14.21 V
Lambda: 2.5 %
Duty Cycle: 10.0 %

16787 - EGR Valve (N18): Malfunction
P0403 - 000 - -
Freeze Frame:
RPM: 2646 /min
Torque: 74.0 Nm
Speed: 42.0 km/h
Temperature: 84.6°C
Voltage: 14.21 V
Lambda: 47.1 %
Lambda: -1.3 %

18628 - Oxygen (Lambda) Sensor B1 S1: Signal too High (Rich)
P2196 - 000 - -
Freeze Frame:
RPM: 1092 /min
Torque: 88.0 Nm
Speed: 6.0 km/h
Load: 43.9 %
Voltage: 14.29 V
Bin. Bits: 00001100
Torque: 144.0 Nm
Temperature: 84.6°C


Readiness: 0 0 0 0 0



They're not listed on the Vag-com/Ross tech wiki. Any help would be appreciated.

You dont state how many miles are on the car, but i suspect it something along the lines of a vacuum hose that is off or broken. Carefully check every inch of hose and all connectors. Address the EGR before you go after the O2 code. The O2 code is likely caused by the EGR fault.

Thanks. There are 69000 miles on it -- I did all of the hoses and N75 a few weeks ago.
I thought the same thing about the O2 code being thrown by the EGR. I pulled and cleaned the EGR last night (and cleaned all of the electrical connections) -- it was a mess. My suspicion was that carbon build-up on the shaft was keeping it from travelling freely, and since it's motor driven that it was causing the high signal on the potentiometer when it couldn't move. So far so good today -- my first 40 miles of driving have been trouble free.