Compression Ignition Addict
Join Date: Jun 2009
Location: Molalla, Oregon
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You'll need to look at ENHANCED data. data log the egr and see if the PCM is commanding and what the position feed back is. then you'll need to look at IAT2, see if the sensor is skewed and sending a false voltage to the PCM. this is how flow is determined-uses the IAT(1) in the MAF and compares it to the IAT(2) in the intake.
If there were an issue with the EGR valve circuitry itself, it would or should show up during a KOEO test .
there might be other related codes in PCM memory that you are not able to access with a code reader. dunno, never used one.
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