Engine-Codes.com
Engine-Codes – Chevrolet – P18B7 2015 Chevrolet Silverado

P18B7 2015 Chevrolet Silverado Code - Internal Mode Switch 'C' Circuit Shorted

Quick Answer

The P18B7 diagnostic trouble code (DTC) on a 2015 Chevrolet Silverado indicates an issue with the Internal Mode Switch 'C' circuit being shorted. Common causes include Wiring or harness damage, Faulty Internal Mode Switch, Corrosion on electrical connectors. 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
P18B7 2015 Chevrolet Silverado indicates Internal Mode Switch 'C' Circuit Shorted.
Common causes
Common causes include Wiring or harness damage, Faulty Internal Mode Switch, Corrosion on electrical connectors.
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 11, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P18B7 2015 Chevrolet Silverado Description

The P18B7 diagnostic trouble code (DTC) on a 2015 Chevrolet Silverado indicates an issue with the Internal Mode Switch 'C' circuit being shorted. The Internal Mode Switch (IMS) is a component within the transmission that communicates with the vehicle's transmission control module (TCM) to determine the gear selection. In this case, the 'C' circuit refers to a specific circuit within the IMS that has experienced a short circuit.

OBDII Code P18B7 2015 Chevrolet Silverado - Internal Mode Switch 'C' Circuit Shorted
P18B7 2015 Chevrolet Silverado Code - Internal Mode Switch 'C' Circuit Shorted

Common Causes of P18B7 2015 Chevrolet Silverado

  1. Wiring or harness damage
  2. Faulty Internal Mode Switch
  3. Corrosion on electrical connectors
  4. Short circuit in the 'C' circuit
  5. Issues with the transmission control module

Symptoms of P18B7 2015 Chevrolet Silverado

  1. Erratic shifting behavior
  2. Difficulty in accelerating or decelerating
  3. Transmission slipping
  4. Potential stalling of the vehicle

How to Fix P18B7 2015 Chevrolet Silverado

  1. Begin by conducting a thorough inspection of the wiring and harness connected to the Internal Mode Switch 'C' circuit to check for any visible damage or corrosion. Repair or replace any damaged wiring as needed.
  2. Test the Internal Mode Switch to determine if it is functioning correctly. If faulty, replace the IMS with a new one.
  3. Check for any corrosion on the electrical connectors related to the IMS 'C' circuit and clean or replace them if necessary.
  4. Perform a diagnostic scan to reset the trouble code and clear the vehicle's memory.
  5. Test drive the vehicle to ensure that the issue has been resolved and that the transmission is shifting correctly.

Cost to Fix P18B7 2015 Chevrolet Silverado

The typical repair costs for addressing the Internal Mode Switch 'C' circuit shorted issue on a 2015 Chevrolet Silverado can range from $200 to $500, including parts and labor. It is important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, but rates may be higher in metropolitan areas or at dealerships. Independent shops often offer lower labor rates. For a more accurate estimate, it is recommended to inquire with local auto repair shops.

Need more information about the P18B7 2015 Chevrolet Silverado code?

Need more information on how to fix the P18B7 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P18B7 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 P18B7 2015 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P18B7 in a 2015 Chevrolet Silverado?

The common symptoms of OBDII code P18B7, Internal Mode Switch 'C' Circuit Shorted, in a 2015 Chevrolet Silverado may include issues with shifting gears, the transmission not engaging properly, or the vehicle going into limp mode.

2. What can cause the Internal Mode Switch 'C' Circuit Shorted code in a 2015 Chevrolet Silverado?

Possible causes of the Internal Mode Switch 'C' Circuit Shorted code in a 2015 Chevrolet Silverado include a faulty internal mode switch, damaged wiring or connectors, or a malfunctioning transmission control module.

3. How serious is the P18B7 code in a 2015 Chevrolet Silverado?

The P18B7 code, indicating an Internal Mode Switch 'C' Circuit Shorted, should be addressed promptly as it can lead to transmission issues and potentially unsafe driving conditions. It is advised to diagnose and repair the problem as soon as possible.

4. Can I continue driving my 2015 Chevrolet Silverado with the P18B7 trouble code?

It is not recommended to continue driving your 2015 Chevrolet Silverado with the P18B7 code present, as it can cause further damage to the transmission. It is best to address the issue and have it repaired by a qualified mechanic.

5. How can I diagnose the Internal Mode Switch 'C' Circuit Shorted code in my 2015 Chevrolet Silverado?

Diagnosing the P18B7 code in a 2015 Chevrolet Silverado typically involves using a scan tool to retrieve the trouble codes, inspecting the internal mode switch and its circuit for damage, and checking the wiring and connectors for any issues.

6. What are some repair tips for fixing the P18B7 code in a 2015 Chevrolet Silverado?

Repair tips for addressing the P18B7 code in a 2015 Chevrolet Silverado may include inspecting and repairing any damaged wiring or connectors, replacing the internal mode switch if necessary, and clearing the trouble codes after completing the repairs.

7. Can I reset the P18B7 trouble code in my 2015 Chevrolet Silverado without fixing the underlying issue?

While you can clear the trouble codes using a scan tool, it is not recommended to reset the P18B7 code in your 2015 Chevrolet Silverado without addressing the underlying issue. The problem may persist and lead to further complications if not properly repaired.

8. How much does it cost to repair the Internal Mode Switch 'C' Circuit Shorted code in a 2015 Chevrolet Silverado?

The cost of repairing the Internal Mode Switch 'C' Circuit Shorted code in a 2015 Chevrolet Silverado can vary depending on the extent of the damage, parts needed for replacement, and labor rates. It is advisable to consult with a mechanic for an accurate estimate.

9. Is the P18B7 trouble code covered under warranty for a 2015 Chevrolet Silverado?

If your 2015 Chevrolet Silverado is still under warranty, the repair for the P18B7 trouble code may be covered depending on the terms of your warranty. It is recommended to check with your dealership or refer to your warranty documentation for more information.

10. Can a DIY enthusiast fix the P18B7 code in a 2015 Chevrolet Silverado?

While some DIY enthusiasts may have the skills to diagnose and repair the P18B7 code in a 2015 Chevrolet Silverado, it is a complex issue related to the transmission system. For safety and proper repair, it is best to consult with a professional mechanic specializing in transmission repairs.

Discuss the causes and fixes for P18B7 2015 Chevrolet Silverado OBDII Code

Submit a New Comment

Code P18B7 2015 Chevrolet Silverado comments

No comments found for this page.