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Originally Posted by wickedwitchsuth
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I AM WORKING ON A 1997 C-230. I HAVE A TROUBLE CODE OF 0170, FUEL TRIM OUT OF LIMITS. I HAVE CHANGED THE SPARK PLUGS, FLUSHED THE INJECTORS, REPLACED THE PRIMARY OXYGEN SENSOR AND THE CODE RECURS AFTER 10 TO 15 MILES OF DRIVING. ANY IDEA OR SUGGESTIONS ON WHAT TO TRY NEXT? APPRECIATE ANY HELP ANY OF YOU CAN GIVE ME. THANKS
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Could you please turn your caps off? Read Steve's response, it outline precisely how to diagnose the problem. I take it you're a tech. Did you charge the customer for all the stuff you've already replaced without solving the problem?