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P4121 Diagnostic Trouble Code Discussion for February 2012

second air pump bank 1

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Trouble Ticket Help Requests for DTC P4121
Help Request Posted
1997 BMW 528i 2.8L MIL Lamp on VIN: WBADD6321V
P4121: second air pump bank 1. Secondary air pump codes. Pump getting no power and we cannot find relay. Some data is wrong, we looked everywhere. Does anyone know where it is?
February 08, 2012