Posts Tagged: P0122 code

How to Diagnose a P0122 Code Like a Pro

P0122 Code: What It Means, What Causes It, and How I Diagnose It Quick Summary A P0122 code is defined as a Throttle Position Sensor/Switch A Circuit Low Input. This indicates a low-voltage issue in the throttle position sensor circuit. In plain terms, the ECM isn’t getting the signal it expects from the throttle body. The most common causes are a failing throttle position sensor, wiring faults, or a dirty throttle body that affects sensor feedback. The right way to fix a P0122 code is to verify the signal—not guess … Read More