Error codes, limp mode.

[Duncdan]

Hi, can you help? I had a load of black smoke blowing out when accelerating, which cleared up after using redX. However, the glow light started flashing, and it went into limp mode. After restarting, the glow light goes out, but the engine management light comes on.
Persistent Error codes
P010100 Mass or volume Air flow Sensor A Circuit range /performance
P10200 Mass or Volume Air flow Sensor A circuit low
P040200 Exhaust Gas Recirc Flow Excessive Detected
P227900 Intake air system leak

I thought it might be the DPF, but the fault codes suggest MAF or EGR. Any suggestions? The intake pipes are all good, and no other problems were detected.

2010 1.9TDI maxi
Thanks

[STP]

Looks like egr, if it's stuck open or closed, the airflow sensor throws a fault for high or low range error. The ecu knows what it should be when the egr is open, and when closed. That's why an egr blanking plate throws an airflow error from the maf.

Sounds like yours is stuck open.