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My 2008 duramax has has multiple gauges flickering the temp sensor says overheat then says ac turned off some codes in the computer are fuel rail pressure to high, po652 sensor circuit low reference the temp guage goes 0 to high back and forth even when its just started. I installed a new temp sensor and its still the same
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Our company truck has a similar problem however it shows the Engine light and Fuel rail pressure to low and change fuel filter all at the same time. This usually happens after a re-fuel.
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Interesting.I think this is not a bad idea. I now have a problem with the Duramax engine, and more specifically with the fuel system.I decided to check the fuel filter with a pressure gauge. To do this, take a pressure gauge, connect it to the fitting located on the fuel injector. Start the engine. Measure the pressure of the combustible mixture. If the value is lower than the parameter specified by the manufacturer, then the filter does not work correctly. So it was on my Dodge. Here https://davesoilchange.com/fuel-filter-for-duramax-diesel/ Found a 6.6 duramax fuel filter. Malfunction eliminated
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