AutoCodes – Hummer – P1682 Hummer

P1682 Hummer 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 Hummer 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 10,412

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 Jul 19, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1682 Hummer 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 Hummer - Ignition 1 Switch Circuit 2 - AutoCodes.com — P1682 Hummer Code - Ignition 1 Switch Circuit 2

What does this mean?

What are the Possible Causes of the DTC P1682 Hummer?

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 Hummer?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1682 Hummer 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 Hummer code?

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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 Hummer Code

1. What are the common symptoms of OBDII code P1682 (Ignition 1 Switch Circuit 2) in a Hummer?

- Common symptoms include difficulty starting the vehicle, intermittent stalling, and issues with the vehicle's electrical system.

2. What are the possible causes of OBDII code P1682 in a Hummer?

- The code P1682 in a Hummer can be caused by a faulty ignition switch, damaged wiring in the ignition circuit, or a malfunctioning ignition control module.

3. How can I diagnose the OBDII code P1682 in my Hummer?

- Diagnosing the code involves using an OBDII scanner to read the trouble codes and then performing a thorough inspection of the ignition circuit components and related wiring.

4. Can I still drive my Hummer with the OBDII code P1682 present?

- It is not recommended to drive the vehicle with the code P1682 present, as it can lead to potential safety issues and further damage to the vehicle's electrical system.

5. How can I repair OBDII code P1682 in my Hummer?

- Repairing the code may involve replacing the ignition switch, repairing damaged wiring, or replacing the ignition control module, depending on the root cause of the issue.

6. Are there any DIY tips for fixing OBDII code P1682 in a Hummer?

- DIY tips include checking for loose or damaged wiring, ensuring proper connection of electrical components, and following the vehicle's service manual for guidance.

7. Can a mechanic help me fix OBDII code P1682 in my Hummer?

- Yes, a qualified mechanic can diagnose and repair the OBDII code P1682 in your Hummer using specialized tools and expertise.

8. Will resetting the trouble codes clear OBDII code P1682 in my Hummer?

- Resetting the trouble codes may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear.

9. How long does it take to repair OBDII code P1682 in a Hummer?

- The repair time for the code P1682 varies depending on the exact cause of the issue and the complexity of the repair, but it typically takes a few hours to complete.

10. Is OBDII code P1682 a serious issue in a Hummer?

- OBDII code P1682 should be addressed promptly as it can cause starting and drivability issues, potentially leading to more severe problems if left unresolved.