Posts Tagged: engine run-on GM

P0172 trouble code and fuel in oil plus rough idle and engine run-on

GM has a fix for a P0172 trouble code and fuel in oil, rough idle, and engine run-on GM has issued a service bulletin #PIP4783B to address a P0172 trouble code and fuel in oil, rough idle, and engine run-on the GM vehicles listed below. Before you perform any diagnostic tests, pull the engine oil dipstick, and check for the presence of fuel. GM has determined that a P0172 System Too Rich (Bank 1) may be caused by a defective high-pressure fuel pump that’s leaking fuel into the crankcase when … Read More