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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 2, 2023
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2013 Mercedes-Benz CLS550 4.7L Poor Idle Quality, Misfire
Hi All, car has misfire bank one, replaced coils , plugs and O2 sensors bank one, no change. Checked upstream lambda and scanner shows bank 2 off, injectors 12&4 are in high positive range in smoothness test. sometimes misfire switches from 2 to cylinder 3... Trouble codes: P0301, P0302, P0304

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