Unknown Powertrain DTC???

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LesGrandsPieds

01-29-2005, 02:13 PM

P1406 Unknown Powertrain DTC (Manufacturer Controlled; Auxiliary Emission
Controls)
^^^I have no idea what that means! I checked alldatadiy and it says it's something about the EGR valve. What's up with this message? I don't understand where the problem is.

dred98

01-30-2005, 11:17 AM

The EGR valve probably needs cleaning.
There's advice on it here . . .
http://www.howardm.net/dred98/underhood.php

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