Help Needed

[xcopbf]

My engine light came on, a mate got his scantool out came back code po172 running rich on bank 1. We cleared the code 3 days later came back. Does any one know what it means fuel use went up from 11.5L to 12.5L. and what are the problems of running to rich to long.

[ratter]

fuel economy will suffer, you will down on power, you can do bore damage from excess fuel washing the bores, cat convertor and o2 sensor can be damaged. These are extreme cases but can happen, you should get the problem sorted out asap

[xcopbf]

Thanks 4 that good to know.

[45T-XR]

Thanks 4 that good to know.

If you have a misfire or white fuel smoke coming from the exhaust then you most likely have a leaking injector, ratter has already outlined the consequences of running too rich, but in addition to that you can damage 02 sensors, but also a 02 sensor failure also causes your engine like to come on and your vehicle to run rich as the signal the PCM is receiving from the 02 sensor is out of specification so the PCM imploys a rich strategy as its less harmful than running lean, but the runnning rich scenaro caused be the 02 sensor will give the same results as the leaking injector, kinda like a vicious loop really haha. but yeah mate you need to get it sorted. Where are you located, I can take a look at it for you if your close by?