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Po161 po400 po155 mercedes benz ml320 year2000.help

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Check engine light stays on.po161 po400 po155

Vehicle: 2000mercedes benz ml320

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P0161 H02S heater circuit malfunction bank 2 sensor 2

P0155 H02S heater circuit malfunction bank 2 sensor 1

P0400 EGR recirculation flow malfunction

Repair the EGR malfunction first, MBZ vacuum hoses to the EGR has a high tendency to rupture or seperate,Which may be the cause of the EGR no flow,

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