AutoCodes – Chevrolet – P18BE 2016 Chevrolet Silverado

P18BE 2016 Chevrolet Silverado Code - Internal Mode Switch 'S' Circuit Stuck Off Invalid Voltage Range

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: P18BE 2016 Chevrolet Silverado indicates Internal Mode Switch 'S' Circuit Stuck Off Invalid Voltage Range.
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 295

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 P18BE 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 has an invalid voltage range of 1.68 – 2.38 V, for 2.7 s.

OBDII Code P18BE 2016 Chevrolet Silverado - Internal Mode Switch 'S' Circuit Stuck Off Invalid Voltage Range - AutoCodes.com — P18BE 2016 Chevrolet Silverado Code - Internal Mode Switch 'S' Circuit Stuck Off Invalid Voltage Range

What does this mean?

What are the Possible Causes of the DTC P18BE 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 P18BE 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 P18BE 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 P18BE 2016 Chevrolet Silverado code?

Need more information on how to fix the P18BE 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 P18BE 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P18BE in a 2016 Chevrolet Silverado?

The common symptoms of code P18BE include issues with shifting gears, delays in gear changes, and the inability to start the vehicle.

2. What does the OBDII code P18BE indicate for a 2016 Chevrolet Silverado?

Code P18BE indicates a problem with the Internal Mode Switch 'S' circuit, specifically that it is stuck off due to an invalid voltage range.

3. What are the possible causes of OBDII code P18BE in a 2016 Chevrolet Silverado?

Possible causes of code P18BE include a faulty Internal Mode Switch, damaged wiring or connectors, low battery voltage, or issues with the transmission control module.

4. How can I diagnose OBDII code P18BE in my 2016 Chevrolet Silverado?

Diagnosing code P18BE involves using a scan tool to check for the specific trouble code, testing the Internal Mode Switch for proper operation, and inspecting the wiring and connectors for any damage.

5. Can I still drive my 2016 Chevrolet Silverado with OBDII code P18BE?

It is not recommended to drive your vehicle with code P18BE as it can lead to transmission issues and potential safety hazards. It is best to address the problem promptly.

6. How can I repair OBDII code P18BE in my 2016 Chevrolet Silverado?

Repairing code P18BE may involve replacing the Internal Mode Switch, repairing any damaged wiring or connectors, ensuring proper battery voltage, and resetting the trouble code with a scan tool.

7. Will resetting the trouble code for P18BE in my 2016 Chevrolet Silverado fix the issue permanently?

Resetting the trouble code may clear the warning light temporarily, but if the underlying issue causing code P18BE is not addressed, the problem is likely to recur.

8. Can a DIY enthusiast fix OBDII code P18BE in a 2016 Chevrolet Silverado?

While some basic diagnostics and repairs can be done by DIY enthusiasts, addressing code P18BE may require specialized tools and expertise, so it is recommended to consult a professional mechanic.

9. How long does it take to repair OBDII code P18BE in a 2016 Chevrolet Silverado?

The repair time for code P18BE can vary depending on the exact cause of the issue and the complexity of the repair needed. It is advisable to consult a mechanic for a more accurate estimate.

10. Is OBDII code P18BE a common issue in 2016 Chevrolet Silverado vehicles?

While code P18BE may not be as common as some other OBDII codes, it can still occur in 2016 Chevrolet Silverado vehicles due to various factors such as wear and tear, electrical problems, or component failures.