P0420 Diagnostic Trouble Code Discussion for January 2021
Catalyst Efficiency Below Normal (Bank 1)
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| Help Request | Posted | |
| 2015 Ford Transit-350 XL 3.7L MIL Lamp on VIN: 1FBZX2CM3F P0420: Car Eff Bank 1. ... engine light. Had codes p0148 Fuel delivery error,p0174&p0171 lean both banks,po420 cat eff bank 1. Found air filter to be wet and apart. coated mass air sensor in paper. Clean air box, snorkel, and mass air & cleared codes. Back with lean and ... |
January 11, 2021 | |
| 2007 Kia Sportage LX 2.7L Battery light on. VIN: KNDJE72367 This is a strange one. Symptoms are intermittent but often. Charge light on, yet charging system voltage is good @ 14.4 volts. Sometimes the charge light is out and engine runs normally. Sometimes charge light is on and engine runs normally. Other times en... |
January 25, 2021 | |
| 2015 Jeep Grand Cherokee Limited 3.6L MIL Lamp on VIN: 1C4RJFBG2F P0420: cat efficiency bank 1. greetings to all customer went to dealer for check engine light on.Dealer pulled coodes and does diagnostics for code po420 cat efficiency bank1 and p20096 down stream fuel trim lean bank 1 tell her bad cat and o2 sensors.Customer comes to me for repairs w... |
January 26, 2021 |
