331g serial number 1T0331GMAHF317549 throwing codes DCU 523595 inlet nox sensor very high 3938.4 and DCU 523596 outlet nox vey high 3935.4 What do I need to do to resolve this issue. I have 2 other codes EMU 2251.09 SAR combo fault 3932.0 Finally EGR Pressure sensor fault 3925.3 and 3940.8 Faults cleared last week but returned this week. I would appreciate your assistance.
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