Question about 1997 Mitsubishi Mirage
That code typically comes on due to an air leak, clogged fuel injectors, clogged fuel filter, or even a bad mass air sensor. I have answered other questions from people with similar problems, and some have had luck simply using a fuel injector cleaner with a full tank of premium gasoline. I've had good luck with STP Complete Fuel System Cleaner, available at most auto parts stores. I would also recommend you replace your air filter.
If your light had turned off, there really isn't much any mechanic can do, though you can ask for them to check for any air leaks in your intake system. But if your light comes on again and stays on, the problem probably is with your mass air sensor, and would probably need to be replaced.
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Posted on Mar 11, 2011
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Posted on Jan 02, 2017
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The code P0170 means that the air-fuel mixture coming in to the engine is too lean, or too rich. Usually it's the lean condition that causes this code. The code P0173 means the same, only for the Bank 2. Some car manufacturers list the description for the code P0170 as self adaptation out of limits.
The code P0170 could be caused by a number of reasons, such as vacuum leaks, bad PCV valve, or other parts of crankcase ventilation system, low fuel pressure, bad oxygen sensor, bad MAF sensor or even a bad EGR vlave.
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