P0491 Diagnostic Trouble Code Discussion for January 2021
Secondary AIR System Insufficient Flow Detected (Bank 1)
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| Help Request | Posted | |
| 2002 Volkswagen Passat GLX 4 Motion 2.8L MIL Lamp on, P0491, p0492 VIN: WWWTH63B52 P0491: Secondary Air Injection-Bank1. The problem here is the MIL light being on due to Secondary Air Injection Issue to bank 1 and 2. The MIL light comes on when all monitors are set except the Secondary Air Injection, which says the test was ABORTED. |
January 17, 2021 |
