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Re: Computer replacement?
Absolutely get a 2nd opinion. Without additional information about what diagnostics the mechanic did, I cannot offer any more advice. There are tests you can do to see if the O2 sensor is working properly. O2 sensors periodically do need to be replaced. I'm not sure what would be causing the EGR issue. Diagnosing a faulty computer usually is a last resort when all other diagnostics say the individual components are working properly.
Anthony
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