Charles Percy Posted on Sep 14, 2014

Code po128 on 2007 mercedes c class230

Code po128 came up I have replaced the thermostat no help

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Chuck Forbes

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Posted on Sep 14, 2014

Chuck Forbes

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Did you clear the code after replacing the thermostat and it came back? If you didn't clear the code, do so. If it came back the problem could be a faulty coolant temp sensor. That is the next thing to check.

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Code po128 on 2007 mercedes c class230

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