Question about 2004 Isuzu Rodeo
keeps pulling codes po172 and po175
The PCm has determined that during testing, ther fuel system for bank 2 was too rich. Can anyone know the solution?
Posted on Jan 12, 2009
I have seen 2 things that cause this on the V6 6VE1 petrol engine, one could be a pin hole in the fuel pressure regulator diaphram causing fuel to be sucked into intake manifold. the other is a bad wire crimp joint for main earths which is in main wiring loom under injector rail on left bank between the first and second injector (black wires with black tape that has all white sticky stuff under it) take wires out of plastic tubing to find splice joint remove sticky gooie tape and clean with electrical contact spray and dry then soilder joint and re tape up. can confirm this fault by pulling moving loom when engine running and noting readings changing on scan tool for O2 sensors and possibly engine running rough then good.
should then reset fuel trim cells with scan tool after either repair then watch the short and long term fuel trims they wont be as high as they were which would have been 25% or higher to bring on check engine light and set your rich fuel trim codes.
Posted on Oct 03, 2013
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Posted on Jan 02, 2017
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