R129 2000 SL500 fuel trim codes.

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Sep 5, 2016 | 01:55 PM
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Two codes came up during a scan. Both fuel trim codes - left and right bank. What should I do next?
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Sep 5, 2016 | 08:51 PM
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I'll guess you got P0170 and P0173. A defect is causing the basic open-loop fuel mixture to be too rich or too lean. There are endless explanations for these codes and how to correct them. One is here.
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Sep 6, 2016 | 10:06 PM
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Thank you.
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