AutoCodes – Chevrolet – P1841 2016 Chevrolet Silverado

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

Quick Answer

The internal mode switch indicates the Transmission Control Module (TCM) which gear position the vehicle operator has selected. Common causes include Faulty Transmission Internal Mode Switch, Transmission Internal Mode Switch harness is open or shorted, Transmission Internal Mode 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: P1841 2016 Chevrolet Silverado indicates Internal Mode Switch 'S' Circuit High Voltage.
Common causes: Common causes include Faulty Transmission Internal Mode Switch, Transmission Internal Mode Switch harness is open or shorted, Transmission Internal Mode 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 174

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 23, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1841 2016 Chevrolet Silverado Description

The internal mode switch indicates the Transmission Control Module (TCM) which gear position the vehicle operator has selected. The internal mode switch consists of 5 separate hall effect switches. Each hall effect switch is supplied with a 9 V reference circuit and a signal circuit from the TCM. Each signal circuit for each gear selector position will have either a voltage reading of 0.70–0.96 V indicating On or 1.68–2.38 V indicating Off. The voltage values on each internal mode switch circuit will change and are dependent on the position of the gear selector. The state of each internal mode switch A/B/C/P/S signal circuit is displayed on the scan tool. The Diagnostic Trouble Code (DTC) will be set when the TCM has detected the internal mode switch S signal circuit voltage is greater than 2.38 V, for 1.75 s.

OBDII Code P1841 2016 Chevrolet Silverado - Internal Mode Switch 'S' Circuit High Voltage - AutoCodes.com — P1841 2016 Chevrolet Silverado Code - Internal Mode Switch 'S' Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1841 2016 Chevrolet Silverado?

Faulty Transmission Internal Mode Switch
Transmission Internal Mode Switch harness is open or shorted
Transmission Internal Mode Switch circuit poor electrical connection
Faulty Transmission Control Module (TCM)

How to Fix the DTC P1841 2016 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1841 2016 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 P1841 2016 Chevrolet Silverado code?

Need more information on how to fix the P1841 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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.