P0420 Diagnostic Trouble Code Discussion for January 2012
Catalyst Efficiency Below Normal (Bank 1)
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| Help Request | Posted | |
| 2004 Volkswagen Jetta GLS 2.0L MIL Lamp on VIN: 3VWSA69M04 P0420: cat efficiency bank 1. car is in now for a check engine lite on,timing belt and other p.m.maintenance before i start i would like to know if any vw techs seen these codes all together or if they have anything in common.alldata has no tests for po333,po328,po1326 any help would be gr... |
January 10, 2012 | |
| 2006 Chevrolet Aveo LS 1.6L MIL Lamp on VIN: KL1TD56646 P0420: Catalyst System Low Efficiency. ... car lot with a check engine light on. P0420 in system. It also had a few air bag codes. Reseating a connector and clearing the codes made the air bag light go away. Usually I can monitor the rear O2 to see if it is mirroring the front but this one is a l... |
January 20, 2012 | |
| 2003 Toyota Highlander 3.0L MIL Lamp on VIN: JTEHF21A33 P0420: Catalyst Efficiency Below Normal (Bank 1). This vehicle has 2 catalytic converters at the manifolds and 1 before the front muffler. 1 air fuel sensor before each front converter and only 1 downstream oxygen sensor after the rear converter. So how are we monitoring cat 1&2? Or is the downstream cons... |
January 27, 2012 |
