P0031: O2 Sensor → Heater Control Circuit → Low (B1S1)
P0031 is a fairly common OBD II trouble code. It’s generic, which means that it applies to any vehicle made since 1996. As far as trouble codes go, this is a relatively easy one to diagnose. It is usually caused by a bad oxygen sensor, or a wiring issue. Table of Contents 1. P0031 Definition 2. P0031 … Read more