P0491 Diagnostic Trouble Code Discussion for July 2013
Secondary AIR System Insufficient Flow Detected (Bank 1)
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| Help Request | Posted | |
| 2007 Porsche 911 Carrera 3.6L MIL Lamp on VIN: WP0CA29917 P0491: Secondary Air Bank 1. Hello all, We have this 997 in with a check engine light on. No secondary air injection operation. Checking the wiring to the system revealed no power coming out of the pump to the control relay. This system has the relay and the fuse on the ground side. The ... |
July 18, 2013 |
