I had to replace my EGR. I still have a 32 fault. I checked the 4 wires at the egr cu. The gray and the pink have B+, black has ground. Brown has B+ key on, then after starting car and idling in closed loop the brown wire shows -12.5mV. I have a print out of ECM pinouts, and it reads less than 1 volt. Is the -12.5mV a proper range for the ECU or is that too low? I did double check readings.
Did you replace the EGR or the EGR solenoid. I had the same code, occasionally. Since replacing the solenoid, I haven't seen it. Yet.
Brian