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I am driving along and a red light comes on "Check

Customer Question
Engine"..... I wouldn't know what...
I am driving along and a red light comes on "Check Engine"..... I wouldn't know what to check if I opened up the bonnet. Can you help me please?
Its a Subaru Liberty 15 years old
Submitted: 2 years ago.Category: Subaru
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Answered in 18 minutes by:
3/8/2016
Subaru Mechanic: Eric, Automotive Repair Shop Manager replied 2 years ago
Eric
Eric, Automotive Repair Shop Manager
Category: Subaru
Satisfied Customers: 34,304
Experience: Automotive Repair Shop Manager, Technician/JA Mentor
Verified

HI,

the check engine light only comes on when the onboard computer detects a fault in either the engine management system, transmission, or emission control system. Faults can range from vacuum leak, engine misfire, transmission problem, emission control leak, one of dozens of engine or transmission sensors, or even internal engine or transmission failure. There are over 500 fault codes that can cause the check engine light to come on. And not every one has symptoms you can feel or see or hear.

The only way to determine which of the over 500 faults is responsible is to have the onboard computer read with a diagnostic scanner. once this is done and the fault code retreived then pinpoint diagnosis can be done and repair done.

without knowing which of the over 500 faults is responsible, it is simply impossible, as well as irresponsible for anyone to guess at to which one is responsible for the check light coming on.

So you will need to have a shop use a scan tool to read the computer for the stored fault codes and go from there in diagnosing and repair

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Subaru Mechanic: Eric, Automotive Repair Shop Manager replied 2 years ago

I noticed we have not yet resolved your concern you asked about. I would sure appreciate it if you would reply so I can offer my skills and knowledge and repair guide access to help as best I can.

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If the answer is YES to any of these just press reply and lets work on this concern some more.

If you have new questions now or in the future please do not hesitate to ask them. If you would like me to assist you. Just bookmark this page so you can access my profile easy and post a new question from the question box on my profile page.

Please remember to rate service using the rating page so that I may receive credit. Thanks

Ask Your Own Subaru Question
Subaru Mechanic: Eric, Automotive Repair Shop Manager replied 2 years ago

I noticed we have not yet resolved your concern you asked about. I would sure appreciate it if you would reply so I can offer my skills and knowledge and repair guide access to help as best I can.

~Do you still need more help?
~Confused by my info request or answer?
~Need more time?
~Confused on how the site works?
~Need more detail or a different explanation?

If the answer is YES to any of these just press reply and lets work on this concern some more.

If you have new questions now or in the future please do not hesitate to ask them. If you would like me to assist you. Just bookmark this page so you can access my profile easy and post a new question from the question box on my profile page.

Please remember to rate service using the rating page so that I may receive credit. Thanks

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Eric
Eric
Eric, Automotive Repair Shop Manager
Category: Subaru
Satisfied Customers: 34,304
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Experience: Automotive Repair Shop Manager, Technician/JA Mentor

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