Question about Mitsubishi Galant
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Posted on Jan 02, 2017
Well, the code 12 is telling you the battery or the computer has been disconnected in the last 50 starts, code 21 is a problem with the O2 sensor, and code 55 is telling you there are no more trouble codes stored in memory.
Code 21 means the O2 sensor is not switching from rich to lean, which can be a faulty sensor or a fuel problem.
Posted on Aug 29, 2012
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