P0420 Diagnostic Trouble Code Discussion for November 2019
Catalyst Efficiency Below Normal (Bank 1)
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| Help Request | Posted | |
| 2006 BMW 325i 3.0L Excessive Emissions VIN: WBAVB13506 P0420: 29F4 Catalytic Converter1 conversion. Trying to figure out what would cause the cat faults to return. Autologic shows both cats have the efficiency fault codes at exactly the same time. Is there something else in common to both banks causing this or it just happens to be that the DME is testin... |
November 19, 2019 |
