Aug 19, 2024 · The P1682 diagnostic trouble code (DTC) refers to the Ignition 1 Switch Circuit 2. This code indicates a problem with the electrical circuit that controls the ignition switch in the vehicle.

Jan 13, 2026 · Uncover quick solutions for fixing the P1682 code and get your vehicle running smoothly again—find out how in just a few steps.

Mar 28, 2024 · Diagnostic fault code P1682 is indicative of an imbalance in voltage between an ignition switch’s #1 & #2 circuits. This imbalance can wreak havoc on a vehicle’s electrical system if left …

Dec 13, 2023 · How to fix a GM or Chevrolet P1682 engine Code: Driver 5 Line 2 "Ignition 1 Switch Circuit 2." There are two ignition voltages supplied to the ECM. The first...

Dec 19, 2024 · DTC P1682 stands for “Ignition 1 Switch Circuit 2,” and this is logged when the PCM detects a voltage difference between multiple ignition feeds. Code P1682 is often caused by a …

Oct 12, 2022 · What are the common causes of code P1682? Causes of code P1682 are similar on all GM products and could include one or more of the following- Failed, failing, or defective ignition …

Mar 27, 2024 · The P1682 code means that there is a problem with the ignition switch circuit. This can be caused by a number of things, including a bad ignition switch, a wiring problem, or a problem with …

Mar 4, 2026 · Got a “Reduced Engine Power” warning and a P1682 code staring you down? This post breaks down exactly what’s happening inside your GM’s electrical system, why it triggers that …

May 3, 2026 · Code P1682 indicates a voltage mismatch greater than 3 volts between the engine computer's two main power feeds, causing sudden engine stalling or a no-start condition.

Facing P1682? Diagnose this critical PCM power supply code quickly. Get symptoms, causes, and sequential troubleshooting steps.