P0420 Diagnostic Trouble Code Discussion for September 2016
Catalyst Efficiency Below Normal (Bank 1)
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| Help Request | Posted | |
| 2004 Nissan Frontier XE 2.4L Cuts out, Fail safe mode VIN: 1N6DD26T34 P0420: Catalyst Efficiency Below Normal (Bank 1). Today's problem child presented with a complain of significant power loss and bucking under acceleration. During our test drive the vehicle ran absolutely normally until it didn't. When it first happened to me, I was cruising the highway at 70mph and it felt l... |
September 01, 2016 | |
| 2002 Lexus ES300 3.0L Hesitation VIN: JTHBF30G92 P0420: Catalyst Efficiency Below Normal (Bank 1). Hello fellow Techs, I got one that is kicking my a**. Car came in with misfires on bank 1 & fuel system too lean, catalyst efficiency codes on both banks. Vehicle hesitates under load & Bank 1 A/F ratio sensor reads 4.99V at WOT under load. Bank 2 sens... |
September 24, 2016 | |
| 2004 Dodge Ram 1500 ST 5.7L Misfire, MIL Lamp on VIN: 1D7HU18D34 P0420: cat efficency code. ... running very poorly with multiple codes. upon inspection we found plugs were wiped out and oe wires. so we replaced plugs and wires and it ran great. a week later customer was back with an intermittent misfire on cylinders 1 3 5 7. scasnned it and found re... |
September 28, 2016 |
