P0420 Diagnostic Trouble Code Discussion for May 2016
Catalyst Efficiency Below Normal (Bank 1)
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| Help Request | Posted | |
| 2002 Volkswagen Golf GLS 2.0L Cuts out, Stall VIN: 9BWGK61J92 P0420: catalyst system bank 1 below threshold. Car came to us during extreme cold (-20 f) had stalled on highway but restarted. We were able to get it to stall at extreme low speed, right turn,brake on, no throttle. A second event occurred at heavy throttle, straight operation,warm engine, and a third duri... |
May 06, 2016 | |
| 2006 Chevrolet Impala SS 5.3L Misfire, MIL Lamp on VIN: 2G1WD58C96 P0420: Catalyst System Low Efficiency. ... codes. p1101 air flow correlation (actual vs expected) p0171 lean bank one p0420 cat efficiency p3449 Cylinder 7 displacement on demand deactivation solenoid control circuit. the 1101 resets pretty quickly (first in pending then again as a hard code, from ... |
May 16, 2016 | |
| 2006 Chevrolet Impala SS 5.3L Misfire, MIL Lamp on VIN: 2G1WD58C96 P0420: Catalyst System Low Efficiency. ... codes. p1101 air flow correlation (actual vs expected) p0171 lean bank one p0420 cat efficiency p3449 Cylinder 7 displacement on demand deactivation solenoid control circuit. the 1101 resets pretty quickly (first in pending then again as a hard code, from ... |
May 18, 2016 | |
| 2012 Ford Focus SE 2.0L Excessive Emissions, MIL Lamp on VIN: 1FAHP3F2XC P0420: cat. ... for parts store owners friend. Had about seven codes including small evap leak. It was a Friday afternoon and he couldn't leave it, so I cleared codes and to see what might show up first when he dropped it off a week later. I retrieved 3 codes only and all... |
May 23, 2016 | |
| 2002 Toyota Highlander 2.4L MIL Lamp on VIN: JTEGD21A52 P0420: Catalyst Efficiency Below Normal (Bank 1). ... recently installed an engine and the check engine light came on not too long after. Found P0420 and P0430 stored. Engine looked like it was done professionally. Put on an aftermarket cat assembly. Drove and codes came ba... |
May 23, 2016 |
