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Dan, Technician
Category: Mercedes
Satisfied Customers: 26226
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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Engine light code po128. No code is po128. 2009 c300

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engine light code po128
JA: Has your vehicle stalled? Has anyone run a diagnostic test to pull the trouble code?
Customer: no code is po128
JA: What is the model/year of your Mercedes?
Customer: 2009 c300
JA: Are you fixing your C300 yourself? What have you tried so far?
Customer: yes
JA: Anything else you want the mechanic to know before I connect you?
Customer: no

Hello, my name is ***** ***** I'm here to help get your problem solved.

This code means the engine is taking too long to warm up which can be caused by a failing thermostat or coolant temp sensor, the thermostat is the most common of the two. I would recommend replacing thermostat with a OEM part. This would be around a $300-$400 job at a shop depending on where you go. Let me know if you have more questions or if there is anything else I can do to help. Thanks.

Customer: replied 1 year ago.

No problem, I'm happy to help. Let me know if there is anything else I can do, thanks.

Ever get problem figured out? Please do not forget to rate answer. Thanks.

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