Use of high sulfur diesel can cause emission system component malfunction and cause the check engine light to come on. Using high sulfur fuel (greater than 500 PPM sulfur) can cause corrosive damage to the EGR valve and DPF.
The 6.4 PowerStroke is designed to run on ultral low sulfur diesel (ULSD) fuel, which has no more than 15 PPM sulfur content. Broadcast Message 0351.Ħ.4 EGR valve and particulate filter (DPF) failures due to high sulfur fuel: Replace affected parts with ones with a date stamp of 8-20-07 or later. Some 2008 F-SuperDuty trucks may have headlights that appear foggy, smokey or seem to have a film on the inside of the lens. The lamp retaining bracket, F81Z-15A436-AA, should be replaced as well. If the side marker lamp assembly must be replaced, discard the bulb that comes with the assembly and install bulb p/n C2AZ-13466-C. Some trucks may have marker lamps that are loose on the fenders, or fall out. At time of publishing, a Ford branded remanufactured EGR valve cost $145 USD, whereas a new o-ring and gasket set could be purchased for just over $10 USD.Loose side marker lamps, 2008 dual rear wheel pickups: there are no electronic issues with the solenoid, cleaning the EGR valve is an affordable repair method with a high rate of success. P0404 - Exhaust gas recirculation circuit range/performance (many possibilities, one of which is the valve position is not matching that commanded by the PCM)Īs long as the valve is mechanically stuck/sticking, i.e. P0402 - Excessive EGR flow detected (valve sticking/stuck at or near the open position) P0401 - Insufficient EGR flow detected (valve sticking/stuck at or near the closed position) EGR valve issues should trigger one of the following codes: This is typically accompanied by excessive black smoke exiting the tailpipe, rough idle, running rough at low RPM, and all around low power/response. An EGR valve that sticks in the open position provides maximum EGR flow into the incoming air stream.
If performance tunes or other injection modifications give your truck a tendency to produce more smoke, the same soot is passing through your EGR system.Īn EGR valve that sticks in the closed position provides no EGR flow into the incoming air stream and noticeable symptoms are typically low, although this has been known to contribute to an over-boost condition. Consider this - what comes out of your tailpipe must also pass through the EGR valve. Modified engines be more susceptible to EGR valve clogging concerns due to a greater production of exhaust soot. We recommend 6.0L Power Stroke owners service their EGR valve every other oil change or once per year - this is typically routine enough to avoid complications, although some engines suffer from more persistent problems.
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