Posts Tagged: P0172
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
P0172 code: What it means and the most common causes
Learn what a P0172 code means, the most common causes and how to fix it A P0172 code is defined as System too Rich (Bank 1). Bank 1 is the bank of cylinders that contains #1 cylinder. The code is telling you that it’s seeing a constantly rich reading from the oxygen sensor located in the Bank 1 exhaust stream. The most common symptoms of a System Too Rich Code • Check engine light • Poor idle • Excessive fuel smell from the exhaust • Black soot inside the tailpipe• … Read More