P0420 Diagnostic Trouble Code Discussion for April 2012
Catalyst Efficiency Below Normal (Bank 1)
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| Help Request | Posted | |
| 2003 Toyota RAV4 2.0L Excessive Emissions, Misfire, MIL Lamp on VIN: JTEHH20V03 P0420: Catalyst Efficiency Below Normal (Bank 2). Vehicle keeps going through ignition coils had first set of coils from standard ignition Others replaced at another shop from Napa Auto Parts. As a result of being driven with the misfire it has destroyed two catalytic convertors. Cant find the reason for the ... |
April 03, 2012 | |
| 2001 Toyota Corolla CE 1.8L Excessive Emissions, Poor Idle Quality, Hesitation, MIL Lamp on VIN: 2T1BR12E11 P0420: Catalyst Efficiency Below Normal (Bank 1). ... Has been in with the same reoccurring problem. Setting codes P0171 and P0420. The MAF has been replaced with a toyota part. The cat was replaced with 2 aftermarket normal emissions cats, then a california emissions aftermarket cat. The o2 sensors were also... |
April 05, 2012 | |
| 2001 Toyota Corolla CE 1.8L Excessive Emissions, Poor Idle Quality, Hesitation, MIL Lamp on VIN: 2T1BR12E11 P0420: Catalyst Efficiency Below Normal (Bank 1). ... Has been in with the same reoccurring problem. Setting codes P0171 and P0420. The MAF has been replaced with a toyota part. The cat was replaced with 2 aftermarket normal emissions cats, then a california emissions aftermarket cat. The o2 sensors were also... |
April 09, 2012 | |
| 2000 Porsche 911 Carrera 3.4L MIL Lamp on VIN: WP0CA2997Y P0420: Catalytic converter efficiency bank 1. customer brought car in a couple of weeks ago. read the diagnostics. (same 2 codes present) cleared the codes. sent him on his way. light returned with same code. my question is, is this a common problem? is it typically the sensor. and if so, has anyone repla... |
April 17, 2012 | |
| 2002 Nissan Altima 2.5L Excessive Emissions, Hesitation, Surge, Stall VIN: 1N4AL11DX2 P0420: Catalyst Efficiency Below Normal (Bank 1). ... regular customer that we do all the work on this car. We put an engine & converter in it about 8 months ago for the usual oil burning problems these cars had. They have since put over 10,000 miles on the car. This problem is probably not related to tha... |
April 20, 2012 | |
| 2001 Volkswagen Jetta GLS 2.0L Hesitation VIN: 3VWSK69M51 P0420: cat efficiency bank 1. good afternoon all,thank you in advance for any and all help,vehicle was brought in last night with a lack of power complaint,test drove car,car ran great,above codes were stored,replaced ign coil(cracked housing) and wires(misfire when watered down)this morni... |
April 25, 2012 |
