P2251 Code: Easy Steps to Solve It
The P2251 trouble code is a diagnostic trouble code (DTC) that indicates an issue with the oxygen sensor’s negative current control circuit, specifically for Bank 1 Sensor 1. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various components of a vehicle’s engine and emissions systems. When the Powertrain Control Module (PCM) detects a discrepancy in the current flowing to the