What is code p0651 on 2008 impala?

Answer 1

Code P0651 on a 2008 Chevy Impala refers to a problem with the Sensor Reference Voltage circuit, specifically indicating an issue with the 5-volt reference circuit that powers various sensors. This could be caused by a faulty sensor, damaged wiring, or a problem with the Engine Control Module (ECM). It’s important to diagnose the issue properly, as it can affect multiple systems in the vehicle. Checking the wiring and connections, along with testing the sensors that rely on the reference voltage, is typically the recommended approach.