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Question:

2001 Focus check engine light?

61K on the odo., gas cap securely set, used only supreme fuel, auto zone code P 0171. The guy told me that O2 sensors last around 50K mi., and that if I replace it, the computer would anyway had to be reset. Car works OK. Any clues ?

Answer:

2001 Ford Focus Check Engine Light
You need to be really focused when on 2 wheels, birds, small animals, and even large bugs are of no interest to a car, but can be a fatal distraction to a person on a motorcycle. Also, when on a MC, you have to assume that everyone else on the road Can't see you!!!, so you need to be prepared ahead of time to react accordingly.
This Site Might Help You. RE: 2001 Focus check engine light? 61K on the odo., gas cap securely set, used only supreme fuel, auto zone code P 0171. The guy told me that O2 sensors last around 50K mi., and that if I replace it, the computer would anyway had to be reset. Car works OK. Any clues ?
No way. It takes a great deal more skills to safely operate a motorcycle. It takes a great deal of focus and attention to the road to stay safe on a motorcycle. Cars are much easier. Why are you having a hard time focussing while driving?
Auto Zone just wants to sell you something that probably won't fix the problem. All these people that say go to autozone don't really know what's going on themselves. There are about 15 things that can set this code. Excessive Fuel Presure Leaking Fuel Injectors Leaking Fuel Presure regulator Low Fuel Presure or running out of fuel Vapor recovory system Air leaks after MAF (Mass Air Flow Sensor) Fords are very particular about air flow. Did you just have an oil change? They may not have put the air box back on completely tight. Vacuum Leaks PCV System Leaking diaphram or EVR Engine oil over fill (did you just have an oil change) Cam Timing Cylinder Compression Exhaust leaks. Now after listing all of that, it is more likely just a little clitch in the system or as stated earlier if you just had an oil change, when they were checking everything they didn't get it all back tight. What usually happens is the engine ran lean for a brief few seconds and the O2 picked up on it. We never condemn anything the first time the customer comes in with a 171. We clear the light and send them on their way. 99 times out of 100 it was just a clitch. May be an early warning sign but not necessarily a real problem yet. One thing most auto owners neglect is their Fuel Induction Services. The cost about $129 or so and can prevent a ton of problems including injectors clogging up which in turn is related to about half the stuff I listed here. If you buy an induction service from a local shop you might get them to turn the light of for you without an extra charge. The big chains probably won't do that.

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