Vehicle: 2008 Mercedes Benz C 300 (204.054)
Problem: This vehicle was brought to the shop
with the Malfunction Indication Lamp on. The technician found DTC
0814, a manufacturer’s code for “Left bank secondary air
injection pump malfunction.” The standard SAE code for this same
issue is P0410.
Details: The technician tried to activate the
air pump with the scan tool. The pump did not operate. Next, he
inspected the air pump fuse. On these vehicles, the fuse often
blows because the pump is drawing too many amps.
Confirmed Repair: In this case, the fuse was
blown and the air pump motor failed an amperage draw test. The
tech replaced the fuse and the air pump. The code was cleared and
the problem was resolved.