PO170,173 Fault codes

1917 MERCEDES BENZ
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DANOMOTIVE
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1998 e320 Mercedes 44,000 miles has fault codes PO170,PO173 (fuel management) ANY HELP? It has turned on the MIL and they won't smog it. I'm in So Cal. By the way the o2 sensors have been replaced.
DAN NEWMAN
Jul 20, 2007 at 8:26 PM
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2CARPRO JACK
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Those are both fuel trim problems. Check all vacuum lines real close for leaks. Could be the Mass Airflow Meter out of range, giving incorrect air readings and throwing the rest of the mixture control off. PM me back
Jul 21, 2007 at 8:44 AM