Engine-Codes.com
Engine-Codes – Chevrolet – P18B7 2014 Chevrolet Silverado

P18B7 2014 Chevrolet Silverado Code - Internal Mode Switch 'C' Circuit Shorted

Quick Answer

The P18B7 diagnostic trouble code (DTC) indicates an issue with the Internal Mode Switch 'C' Circuit in a 2014 Chevrolet Silverado. Common causes include Short circuit in the wiring harness related to the Internal Mode Switch 'C', Faulty transmission range sensor or mode switch, Corroded or damaged 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 2014 Chevrolet Silverado indicates Internal Mode Switch 'C' Circuit Shorted.
Common causes
Common causes include Short circuit in the wiring harness related to the Internal Mode Switch 'C', Faulty transmission range sensor or mode switch, Corroded or damaged 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 Oct 02, 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 2014 Chevrolet Silverado Description

The P18B7 diagnostic trouble code (DTC) indicates an issue with the Internal Mode Switch 'C' Circuit in a 2014 Chevrolet Silverado. This code is part of the vehicle's transmission control system, specifically related to the operation of the transmission range sensor or the mode switch that determines the current gear selection. When the Internal Mode Switch 'C' Circuit is shorted, it signifies that there is an electrical fault, either due to a short circuit, an open circuit, or a malfunctioning component within the circuit.

OBDII Code P18B7 2014 Chevrolet Silverado - Internal Mode Switch 'C' Circuit Shorted
P18B7 2014 Chevrolet Silverado Code - Internal Mode Switch 'C' Circuit Shorted

Common Causes of P18B7 2014 Chevrolet Silverado

  1. Short circuit in the wiring harness related to the Internal Mode Switch 'C'.
  2. Faulty transmission range sensor or mode switch.
  3. Corroded or damaged electrical connectors.
  4. Issues with the transmission control module (TCM).
  5. Mechanical failure within the transmission itself, affecting the mode switch operation.

Symptoms of P18B7 2014 Chevrolet Silverado

  1. Erratic or harsh shifting of the transmission.
  2. Transmission may enter limp mode, limiting speed and performance.
  3. Warning lights illuminated on the dashboard, such as the check engine light.
  4. Reduced acceleration or power during driving.
  5. Difficulty in selecting the correct gear or a complete failure to shift.

How to Fix P18B7 2014 Chevrolet Silverado

  1. Diagnostic Testing: Begin by using an OBD-II scanner to confirm the P18B7 code and check for any additional codes that may provide further insight into the issue.
  2. Visual Inspection: Inspect the wiring harness and connectors associated with the Internal Mode Switch 'C' for any signs of damage, corrosion, or loose connections.
  3. Component Testing: Test the transmission range sensor and mode switch for proper operation using a multimeter to check for continuity and resistance values as specified by the manufacturer.
  4. Repair or Replace: If any damaged wiring or connectors are found, repair or replace them as necessary. If the mode switch or transmission range sensor is faulty, replace the component.
  5. Clear Codes and Test Drive: After repairs, clear the DTCs from the vehicle's computer and perform a test drive to ensure that the issue has been resolved and that the transmission operates correctly.

Cost to Fix P18B7 2014 Chevrolet Silverado

** The cost to repair the P18B7 code can vary widely based on the specific diagnosis and repairs needed. On average, the total cost could range from $200 to $800, including parts and labor. Labor costs typically range from $80 to $150 per hour, depending on the location and type of repair shop. Metropolitan areas or dealerships may charge higher rates, while independent shops often offer more competitive pricing. It's advisable for vehicle owners to obtain estimates from local repair shops to get a more accurate idea of potential costs associated with their specific situation.

Need more information about the P18B7 2014 Chevrolet Silverado code?

Need more information on how to fix the P18B7 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P18B7 2014 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 2014 Chevrolet Silverado Code

1. What does the OBDII code P18B7 mean for a 2014 Chevrolet Silverado?

The P18B7 code indicates an issue with the Internal Mode Switch 'C' Circuit, specifically a shorted condition.

2. What are the common symptoms of code P18B7 in a 2014 Chevrolet Silverado?

Symptoms may include difficulty shifting gears, the transmission stuck in one gear, illumination of the check engine light, or erratic transmission behavior.

3. What causes the P18B7 code to appear?

The code is typically caused by a short circuit in the wiring or connectors of the Internal Mode Switch 'C,' a faulty internal mode switch, or transmission control module (TCM) issues.

4. Can driving with the P18B7 code damage my 2014 Chevrolet Silverado?

Yes, continuing to drive with this code can lead to further transmission problems and potentially damage the transmission system.

5. How do I diagnose the P18B7 code on my Silverado?

Start by visually inspecting the wiring and connectors for damage or corrosion. Use a multimeter to test the switch circuit for shorts and verify the function of the internal mode switch.

6. What repairs are needed to fix the P18B7 code?

Repairs may include replacing damaged wiring or connectors, replacing the internal mode switch, or reprogramming or replacing the transmission control module.

7. How much does it cost to repair the P18B7 code on a 2014 Chevrolet Silverado?

The cost varies depending on the root cause, ranging from $100 for wiring repairs to $500 or more for replacing the internal mode switch or TCM.

8. Is the Internal Mode Switch the same as the Transmission Range Sensor?

Yes, in many cases, the internal mode switch is part of the transmission range sensor assembly, which detects gear position.

9. Can a low battery cause the P18B7 code to appear?

While uncommon, a low or unstable battery voltage can sometimes cause electrical faults, including this code. Ensure the battery and charging system are functioning properly.

10. Do I need professional help to fix the P18B7 code?

If you’re not experienced with diagnosing electrical or transmission issues, it’s best to seek assistance from a qualified mechanic to avoid further damage.

Discuss the causes and fixes for P18B7 2014 Chevrolet Silverado OBDII Code

Submit a New Comment

Code P18B7 2014 Chevrolet Silverado comments

No comments found for this page.