AutoCodes – Chevrolet – P1682 2015 Chevrolet Silverado

P1682 2015 Chevrolet Silverado Code - Ignition 1 Switch Circuit 2

Quick Answer

There are 2 ignition 1 voltage circuits supplied to the Engine Control Module (ECM). Common causes include Faulty ignition switch, Ignition Switch harness is open or shorted, Ignition Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1682 2015 Chevrolet Silverado indicates Ignition 1 Switch Circuit 2.
Common causes: Common causes include Faulty ignition switch, Ignition Switch harness is open or shorted, Ignition Switch circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 941

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 11, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1682 2015 Chevrolet Silverado Description

There are 2 ignition 1 voltage circuits supplied to the Engine Control Module (ECM). The first ignition circuit is provided by the powertrain relay, through a fuse. This ignition 1 voltage circuit supplies power to all the internal ECM circuits associated with the throttle actuator control (TAC) operation. The second ignition 1 voltage circuit is supplied by the run/crank relay through a fuse and is used to power the remaining internal ECM circuits. If the ECM detects a voltage difference between the 2 ignition 1 voltage circuits, DTC P1682 will set.

OBDII Code P1682 2015 Chevrolet Silverado - Ignition 1 Switch Circuit 2 - AutoCodes.com — P1682 2015 Chevrolet Silverado Code - Ignition 1 Switch Circuit 2

What does this mean?

What are the Possible Causes of the DTC P1682 2015 Chevrolet Silverado?

Faulty ignition switch
Ignition Switch harness is open or shorted
Ignition Switch circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P1682 2015 Chevrolet Silverado?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

There is a Factory Service Bulletin for the following Chevrolet models:
2016-2018 Chevrolet Silverado 1500
2019 Chevrolet Silverado LD
Dead Battery / P1682 P129D P10E4 P2535 / Crank No Start

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1682 2015 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1682 2015 Chevrolet Silverado code?

Need more information on how to fix the P1682 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1682 2015 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1682 2015 Chevrolet Silverado Code

1. What does the OBDII code P1682 mean on a 2015 Chevrolet Silverado?

P1682 indicates an issue with the Ignition 1 Switch Circuit 2, which suggests a problem in the secondary ignition circuit responsible for powering certain vehicle systems.

2. What are the common symptoms of code P1682 in a 2015 Silverado?

Symptoms include difficulty starting the engine, intermittent stalling, reduced power, or the check engine light being illuminated.

3. What causes the P1682 code on a 2015 Chevrolet Silverado?

Common causes include a faulty ignition switch, damaged wiring in the ignition circuit, a failing powertrain control module (PCM), or a poor electrical connection.

4. Can a bad battery cause the P1682 code to appear?

While unlikely, a weak or failing battery can sometimes cause voltage irregularities that might trigger the code. However, the primary causes are usually related to the ignition system.

5. How do you diagnose the P1682 code on a 2015 Silverado?

Diagnosis involves checking the ignition switch and related wiring for continuity, inspecting for damaged or corroded connectors, and testing the PCM if other components appear functional.

6. Is it safe to drive a 2015 Silverado with the P1682 code?

Driving with this code is not recommended, as it can lead to intermittent stalling or a complete inability to start the vehicle, potentially leaving you stranded.

7. How is the P1682 code typically repaired?

Repairs may involve replacing the ignition switch, repairing or replacing damaged wiring, cleaning corroded connectors, or, in rare cases, replacing the PCM.

8. How much does it cost to fix the P1682 code on a 2015 Silverado?

Repair costs vary but typically range from $150 to $500, depending on whether the issue lies with the ignition switch, wiring, or PCM.

9. Can a DIYer fix the P1682 code on a 2015 Chevrolet Silverado?

Yes, if you have basic automotive knowledge and tools, you can inspect the ignition switch and wiring. However, diagnosing or replacing the PCM may require professional assistance.

10. Will clearing the P1682 code with an OBDII scanner fix the problem?

Clearing the code will temporarily reset it, but if the underlying issue is not resolved, the code will likely return.