6.7L Cummins Forum

Here's another code that Winger was asking about. This one I have seen a couple of times in 58,000 miles but it's never been a hard recurring code for me.

The purpose of this diagnostic is to check for a condition where EGR flow is higher than commanded. This algorithm runs at idle. The diagnostic closes the EGR valve, and limits the intake air throttle valve. It then looks at fresh air flow fraction and the difference in pressure between the exhaust manifold pressure sensor and boost pressure sensor to determine if the EGR valve is leaking. The ECM will illuminate the MIL lamp after the diagnostic runs and fails in two consecutive drive cycles. The ECM will also illuminate the ETC lamp. The MIL lamp will turn off once the diagnostic runs and passes in 4 consecutive drive cycles.

• When Monitored: Engine running, Coolant temperature above a calibrated threshold, Intake Manifold temperature above a calibrated threshold, EGR valve is closed.
• Set Condition: When intake throttle is closed, EGR fraction increases more than a calibrated threshold.

Possible Causes
EXHAUST GAS PRESSURE SENSOR
EGR AIRFLOW THROTTLE CONTROL VALVE
EGR VALVE

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2007.5 Dodge Ram 3500 HD,QC, 6.7L Cummins, 6speed Auto, 4X4, Bighorn Edition.
Click for installs: Carr Steps PML Diff Cover Edge Juice with Attitude Volant Intake Hankook ATM RF10

The last time this happened they replaced the accuator for the vavle. The next time it happened they changed out the valve. So now what is next? The first time I took my volant off cause I wasn't sure how the service manager would react, after talking to him I left it on the next time and it was not a problem so that is all good. We will see when I take it in next week.

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Winger
2008 2500 Silver 4x4 6 Speed Auto Big Horn Edition Volant CAI Magnaflow Muff Edge w/ Attitude
1990 Honda GL 1500 Wineberry 125,000 Miles
2005 Honda GL 1800 Candy Blackcherry 50,000 Miles