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P1841 2016 Chevrolet Silverado Code - Internal Mode Switch 'S' Circuit High Voltage

Quick Answer

The P1841 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado refers to an issue with the Internal Mode Switch 'S' Circuit High Voltage. Common causes include Faulty Internal Mode Switch (IMS), Damaged wiring or connectors in the IMS circuit, Corrosion or poor connection in the IMS system. 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
P1841 2016 Chevrolet Silverado indicates Internal Mode Switch 'S' Circuit High Voltage.
Common causes
Common causes include Faulty Internal Mode Switch (IMS), Damaged wiring or connectors in the IMS circuit, Corrosion or poor connection in the IMS system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P1841 2016 Chevrolet Silverado Description

The P1841 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado refers to an issue with the Internal Mode Switch 'S' Circuit High Voltage. The Internal Mode Switch (IMS) is a component within the transmission that communicates the gear position to the vehicle's computer system. In this case, the 'S' circuit is indicating a high voltage, which can disrupt the proper operation of the transmission and other related systems.

OBDII Code P1841 2016 Chevrolet Silverado - Internal Mode Switch 'S' Circuit High Voltage
P1841 2016 Chevrolet Silverado Code - Internal Mode Switch 'S' Circuit High Voltage

Common Causes of P1841 2016 Chevrolet Silverado

  1. Faulty Internal Mode Switch (IMS)
  2. Damaged wiring or connectors in the IMS circuit
  3. Corrosion or poor connection in the IMS system
  4. Electrical issues within the transmission control module
  5. Software malfunction in the vehicle's computer system

Symptoms of P1841 2016 Chevrolet Silverado

  1. Rough or erratic shifting of the transmission
  2. Delayed engagement when shifting gears
  3. Reduced fuel efficiency
  4. Check engine light illuminated on the dashboard

How to Fix P1841 2016 Chevrolet Silverado

  1. Begin by conducting a thorough diagnostic scan to confirm the P1841 code and identify the specific cause of the high voltage in the IMS 'S' circuit.
  2. Inspect the Internal Mode Switch (IMS) and its wiring for any visible damage, corrosion, or loose connections.
  3. Test the voltage levels in the 'S' circuit to determine if it is indeed reading high and troubleshoot any abnormalities.
  4. Replace the faulty IMS if necessary, ensuring proper installation and connection to the transmission system.
  5. Clear the DTC and perform a test drive to verify that the transmission is shifting smoothly and the code does not reappear.

Cost to Fix P1841 2016 Chevrolet Silverado

The typical repair costs for addressing the Internal Mode Switch 'S' Circuit High Voltage issue in a 2016 Chevrolet Silverado can range from $200 to $500, including parts and labor. However, it is essential to note that actual costs may vary based on the specific diagnosis time, labor rates, and any additional components that may need replacement. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships. It is advisable to consult local repair shops for a more accurate estimate based on individual circumstances.

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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 P1841 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P1841 in a 2016 Chevrolet Silverado?

The common symptoms of OBDII code P1841 in a 2016 Chevrolet Silverado include issues with shifting gears, hesitation or difficulty in shifting, and the vehicle may go into limp mode.

2. What does the Internal Mode Switch 'S' Circuit High Voltage mean in relation to the OBDII code P1841?

The Internal Mode Switch 'S' Circuit High Voltage indicates a problem with the transmission range sensor, specifically related to the 'S' gear position.

3. What are the possible causes of OBDII code P1841 in a 2016 Chevrolet Silverado?

Possible causes of OBDII code P1841 in a 2016 Chevrolet Silverado include a faulty internal mode switch, damaged wiring or connectors, or issues with the transmission control module.

4. How can I diagnose the Internal Mode Switch 'S' Circuit High Voltage issue in my 2016 Chevrolet Silverado?

Diagnosing the Internal Mode Switch 'S' Circuit High Voltage issue involves using a scan tool to retrieve the specific trouble code, checking the wiring and connectors for damage, and testing the internal mode switch for proper operation.

5. Can I still drive my 2016 Chevrolet Silverado with OBDII code P1841?

It is not recommended to drive your 2016 Chevrolet Silverado with OBDII code P1841, as it can lead to further damage to the transmission and potentially unsafe driving conditions.

6. How can I repair OBDII code P1841 in my 2016 Chevrolet Silverado?

Repairing OBDII code P1841 in a 2016 Chevrolet Silverado may involve replacing the internal mode switch, repairing damaged wiring or connectors, or reprogramming the transmission control module.

7. Is it possible to reset OBDII code P1841 in a 2016 Chevrolet Silverado without fixing the underlying issue?

Resetting OBDII code P1841 without addressing the underlying issue will only temporarily clear the code, and the problem is likely to reoccur.

8. What are the long-term effects of ignoring OBDII code P1841 in my 2016 Chevrolet Silverado?

Ignoring OBDII code P1841 in your 2016 Chevrolet Silverado can lead to transmission issues, poor shifting performance, and potential damage to other components in the drivetrain.

9. Are there any preventive measures to avoid OBDII code P1841 in a 2016 Chevrolet Silverado?

Regularly servicing and maintaining the transmission system, checking for any signs of wiring damage, and addressing any shifting issues promptly can help prevent OBDII code P1841 in a 2016 Chevrolet Silverado.

10. Can a DIY enthusiast fix OBDII code P1841 in a 2016 Chevrolet Silverado, or is professional help necessary?

While some DIY enthusiasts may be able to address OBDII code P1841 with the right tools and knowledge, it is recommended to seek professional help for a more accurate diagnosis and effective repair.

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