Posts Tagged: P0123 code

What Does a P0123 Code Mean and How Do You Fix It?

P0123 Code: What It Means, Symptoms, and How I Diagnose and Fix It Quick Summary AP0123 code is defined as “Throttle Position Sensor/Switch A Circuit High Input.”  That means the ECM is seeing a higher voltage than it should. The most common causes of this code are: • A wiring issue, either a harness or a connector issue • A bad throttle position sensor, • Or a throttle body problem. The code can produce symptoms like: •  Poor throttle response, • Harsh shifting, • High idle, • Or force the … Read More