Code 3138 engine exhaust gas recirculation outlet pressure

[Rawze]

FAULT CODE 3138 -- Engine Exhaust Gas Recirculation Outlet Pressure - Data Erratic, Intermittent, or Incorrect.

your red cry-baby is trying to tell you that the EGR pressure is not changing with engine conditions. ...

Possibly...

* The egr valve is stuck

* The EGR pressure sensor itself is reading ok, but is not changing with engine load (bad sensor or someone has attempted to bypass it with a resistor, etc).

* corrosion in the wiring harness.

* The EGR piping is blocked somewhere.

* severe restriction in the EGR cooler.

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To reset the fault after the problem has been fixed, it says to let engine idle for 5 minutes, then shut off for 1 minute, then turn key back on without cranking the truck and wait another 1 minute before performing a "clear all faults" in Insite.