P0420 Diagnostic Trouble Code Discussion for September 2015
Catalyst Efficiency Below Normal (Bank 1)
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| Help Request | Posted | |
| 2000 Chevrolet Blazer LS 4.3L Poor Idle Quality, Hesitation, Surge, Stall, MIL Lamp on VIN: 1GNCT18WXY P0420: Catalyst System Low Efficiency (Bank 1). Hello everyone, We have another 'doozy' and would appreciate your feedback; customer came back in to shop after replacing the oxygen sensor, wires and plugs with a intermittent surge, rough idle complaint. Found the oil pressure sending unit to be leaking oi... |
September 11, 2015 | |
| 2000 Chevrolet Blazer LS 4.3L Poor Idle Quality, Hesitation, Surge, Stall, MIL Lamp on VIN: 1GNCT18WXY P0420: Catalyst System Low Efficiency (Bank 1). Hello everyone, We have another 'doozy' and would appreciate your feedback; customer came back in to shop after replacing the oxygen sensor, wires and plugs with a intermittent surge, rough idle complaint. Found the oil pressure sending unit to be leaking oi... |
September 22, 2015 | |
| 2008 Chevrolet Silverado 1500 WT 4.3L Poor Idle Quality, Surge, Misfire VIN: 1GCEC19XX8 P0420: Cat. Hello and thanks. This truck came in barely running. First tech changed 4 o2s and cats. He said o2 were fixed lean. Changed ran a lot better. When cold to warming up has a little intake popping. When this was happening has little misfiring on cyl 2 so did comp... |
September 24, 2015 |
