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P0412 Diagnostic Trouble Code Discussion for February 2013

Secondary AIR Solenoid Control Circuit Malfunction

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Trouble Ticket Help Requests for DTC P0412
Help Request Posted
2006 Mercedes-Benz E350 4Matic 3.5L MIL Lamp on VIN: WDBUF87J16
P0412: air pump switch over valve open circuit. heres the story scanned car as driver complained of low heat and engine running cold got a code for thermostat performance ,, just one code changed thermostat and filled cooling system and road tested car to verify heat ,, cleared codes all was fine now...
February 06, 2013