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Troubleshooting Poor Boost with "Air Fuel Control Derate" Active in Engine State Monitor

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Notice to locations running the ISB6.7 CM2150 2009 model we encountered poor throttle response in turn replacing the turbocharger, intake manifold pressure sensor, and barometric pressure sensor (between turbo and air filter). Recommended action is to run the Engine State Monitor on road test via the Cummins INSITE program. Our team found a "Air Fuel Control Derate" caused from poor boost. From this we were able to troubleshoot the intake system and find the main cause. The air intake heater grid attached to the intake manifold and EGR Valve were caked with soot.   
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Fault 2554 - Exhaust Gas Pressure 1 - Data Erratic, Intermittent, or Incorrect /// Carbon build up in sensing ports

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  Attention All OTT Locations we found today that our Exhaust Gas Pressure port was blocked with carbon build up. This sensor is connected to a mounting block where a metal sensing line runs to the exhaust manifold. To fix the issue disconnect the metal sensing line and inspect for carbon build up, blow compressed air through it and to clean the carbon build up soak in diesel fuel. Then remove the mounting block and inspect the ports where the sensing line mounts and where the sensor screws in. Use a drill bit approx. 5/32" to clear out the ports upper and lower. Then soak in diesel fuel and blow out with compressed air. It was found that this dirty port was causing the fault. The sensor is still good and does not need to be replaced.
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Door was opening and closing by itself while driving . Diag we found that it had a bad mother board would close but did not open  along with switch  were bad . Also found that it had a bad momentary switch as well carbon track causing  the door to open unexpectedly
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