NEWROCKIES Inc. Passlock Bypass disables the ENTIRE system. I’m a 26 year old female who has a tendency to “FREAK OUT” at the slightest problem with my 2006 Saturn Vue. When my security function in my car kept getting progressively worse, my first thought was to trade it in and have someone else deal with the problem. you might have a problem in the wiring to the ECM. If this is the case Google Images Google Images. The most comprehensive image search on the web. P0420 – Meaning, Causes, Symptoms, & Fixes Feb 21, 2022What Does Code P0420 Mean? P0420 definition: Catalyst system efficiency below threshold (Bank 1); Issue Severity: MODERATE – Extended driving with this code can cause internal engine damage. Repair Urgency: Get this code fixed as soon as possible to avoid further damage to your emission system and possible engine damage. Diagnosis: The most common