2000 Volvo S70 Q&A

2000 Volvo S70 Question: po code 174, 304, and 304

ii thinking...maf sensor, or vacuum leak? -
Answer 1
If it is a fault code for a lean condition and misfire I would recommend: Smoke test the intake system for leaks, repair any leaks. If fault returns it could possibly have a faulty Mass Air Flow Meter -
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mechanic says po302,304,305 300 all connected.