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Check engine light has come on. What could be the problem…

Customer Question
Check engine light has...

Check engine light has come on. What could be the problem and what should I do.

Mechanic's Assistant: Does the light stay on, or does it blink?

It stayed on.

Mechanic's Assistant: What is the model/year of your Mercedes?

S320 from 2009

Mechanic's Assistant: Are you fixing your S320 yourself? What have you tried so far?

No. Have tried nothing but were thinking of checking the oil level

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

The car seemed to lose some power.

Submitted: 22 days ago.Category: Mercedes
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Answered in 1 hour by:
5/27/2018
Mercedes Mechanic: Chris, Auto Service Technician replied 22 days ago
Chris
Chris, Auto Service Technician
Category: Mercedes
Satisfied Customers: 14,758
Experience: 43 years of automotive repair, Smog license
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Hello, my name is ***** ***** I will be assisting you today.
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Mercedes Mechanic: Chris, Auto Service Technician replied 22 days ago
When the check engine light comes on, it means that the PCM (engine computer ) has detected a problem with the fuel, ignition, or emissions system. It could be something as simple as a loose fuel cap, or something major like a failing catalytic converter. Do this: go to your auto parts store and ask them to connect their scan tool to the vehicle and check the diagnostic trouble codes. The PCM will store a code when it turns on the check engine light. Then ask them to clear and erase the code. That will turn off the light. If the problem continues, then the light will come back on. You should then get the vehicle to the dealer or a shop you trust and get it repaired. Note that most auto parts stores will check this for free as a courtesy.
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Mercedes Mechanic: Chris, Auto Service Technician replied 22 days ago
I hope that this information is helpful and if so, would you kindly take a moment and rate my service or accept my answer using the just answer star rating system? I would really appreciate it. I will still be able to help you out even after you rate me.Thank you!Chris
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Mercedes Mechanic: Chris, Auto Service Technician replied 22 days ago
Hello, just checking back to see if you received my answer from earlier today. Please let me know if you did when you get a chance.Chris
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Mercedes Mechanic: Chris, Auto Service Technician replied 19 days ago

Hello, just wondering if you still need help. I replied back to you several days ago and have not heard back at all. Please let me know. If you no longer need any more help, then that is fine, but please let me know so I can close this session.

Thank you!

Chris

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Satisfied Customers: 14,758
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Experience: 43 years of automotive repair, Smog license

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