P0420 Diagnostic Trouble Code Discussion for November 2013
Catalyst Efficiency Below Normal (Bank 1)
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| Help Request | Posted | |
| 2010 Kia Soul Sport 2.0L MIL Lamp on VIN: KNDJT2A26A P0420: Catalyst System Efficiency below Threshold Bank 1. [...] 1 replaced. Checked for exhaust and intake leaks...none found. Checked wiring with ohm meter..all good. checked fuel pressure...within spec. Was told by customer they hit a pot hole and 2 hours after the light came on. They had it at the dealer who repla... |
November 04, 2013 | |
| 2003 Pontiac Vibe GT 1.8L MIL Lamp on VIN: 5Y2SN64L53 P0420: Catalyst System Low Efficiency. this vibe sets these 3 codes after 2 drive cycles and approx. 8 miles. watching scan data I can see bnk 1 o2 sensor cycling between .085-.795 volts but the cycles are very slow taking approx 4-5 seconds at idle and about 3 seconds at cruise. stft cycles from -... |
November 05, 2013 | |
| 2010 Kia Soul Sport 2.0L MIL Lamp on VIN: KNDJT2A26A P0420: Catalyst System Efficiency below Threshold Bank 1. [...] 1 replaced. Checked for exhaust and intake leaks...none found. Checked wiring with ohm meter..all good. checked fuel pressure...within spec. Was told by customer they hit a pot hole and 2 hours after the light came on. They had it at the dealer who repla... |
November 06, 2013 | |
| 2005 Mercury Sable GS 3.0L Poor Idle Quality, Hesitation, Surge, MIL Lamp on VIN: 1MEFM50U95 P0420: catalyst efficiency. Vehicle originally came in for a misfire. Typical dead miss felt with code po301 cylinder 1 misfire. Plug was wet. Misfire and code went away with replacement of coil wires and plug. Catalytic converter efficiency codes remains. Removed converters to check fo... |
November 10, 2013 | |
| 1999 Lexus ES300 3.0L MIL Lamp on VIN: JT8BF28G5X P0420: Catalyst Efficiency Below Normal (Bank 1). Car came in with p0420 code . Replaced rear bank ( y-pipe type ) converter (by way of advice from Toyota tech). Car came back with P0420 code. Car has 3 converters and only one downstream o2 sensor. will this car ever set a p0430 bank 2 converter code. I am gu... |
November 14, 2013 |
