P0420 Diagnostic Trouble Code Discussion for October 2011
Catalyst Efficiency Below Normal (Bank 1)
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| Help Request | Posted | |
| 2000 Mazda Protege ES 1.8L Hesitation, Cuts out VIN: JM1BJ2233Y P0420: Catalyst Efficiency Below Normal (Bank 1). ... my brothers car and I could use a little help. it hesitates and falls on its face after a hot soak. you attemp to take off and it just falls on its face and then takes off normal. it has set the p0420 code 3 times in the last 4 months. the cats do not ratt... |
October 04, 2011 | |
| 2007 Subaru Outback 2.5i Basic 2.5L MIL Lamp on VIN: 4S4BP61C27 P0420: Catalyst Efficiency Below Normal (Bank 1). ... check engine light on code P0420 - no exhaust leaks found. I wanted to check front O2 operation I have a Snap On Solus Pro and the voltage reading idling hot are 2.78 - 2.89 mild fluctuation the rear O2 acts more like what Iam used to seeing - 0.115 - 0.88... |
October 18, 2011 |
