P0420 Diagnostic Trouble Code Discussion for July 2018
Catalyst Efficiency Below Normal (Bank 1)
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| Help Request | Posted | |
| 2003 Toyota Tundra SR5 4.7L MIL Lamp on VIN: 5TBBT44133 P0420: Catalyst Efficiency Below Normal (Bank 1). ... this Toyota. It is setting a P0420 and P0442 codes. We are focusing on the cat code right now, the cat was replaced 50k miles ago with a Magnaflow cat and now the codes have returned. I know the aftermarket cats don't last as long as the originals. But... |
July 10, 2018 | |
| 2013 Volkswagen Tiguan S 2.0L MIL Lamp on VIN: WVGAV7AX4D P0420: Catalyst system bank 1 efficiency below threshold. ... concerns. Scan and found 2 codes stored. P0299 and P0420. First thing I did was smoke the system and make sure no boost leaks. Did not found any leaks. Smoked intake and found smoke coming from upper timing cover. Timing cove... |
July 23, 2018 |
