AutoCodes – Dodge – B18B7 Dodge

B18B7 Dodge Code - Master Switch Rear Left Window Switch

Quick Answer

Whenever the Door Module detects a Rear Left Window signal from the master power window switch, for over 30 seconds, this Diagnostic Trouble Code (DTC) will set. Common causes include Faulty Rear Left Window Switch, Rear Left Window Switch harness is open or shorted, Rear Left Window 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: B18B7 Dodge indicates Master Switch Rear Left Window Switch.
Common causes: Common causes include Faulty Rear Left Window Switch, Rear Left Window Switch harness is open or shorted, Rear Left Window 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 679

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 Jul 26, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B18B7 Dodge Description

Whenever the Door Module detects a Rear Left Window signal from the master power window switch, for over 30 seconds, this Diagnostic Trouble Code (DTC) will set.

OBDII Code B18B7 Dodge - Master Switch Rear Left Window Switch - AutoCodes.com — B18B7 Dodge Code - Master Switch Rear Left Window Switch

What does this mean?

What are the Possible Causes of the DTC B18B7 Dodge?

Faulty Rear Left Window Switch
Rear Left Window Switch harness is open or shorted
Rear Left Window Switch circuit poor electrical connection

How to Fix the DTC B18B7 Dodge?

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 B18B7 Dodge 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.

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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 B18B7 Dodge Code

1. What does OBDII code B18B7 for the Master Switch Rear Left Window Switch in a Dodge indicate?

This code indicates a malfunction in the master switch for the rear left window in a Dodge vehicle.

2. What are the common symptoms of OBDII code B18B7 in a Dodge?

Common symptoms include the rear left window not responding to the master switch, the window getting stuck in a certain position, or the switch not working at all.

3. What could be causing OBDII code B18B7 to trigger in a Dodge?

Potential causes include a faulty master switch, wiring issues, a blown fuse, or a problem with the window regulator.

4. How can I diagnose the issue related to OBDII code B18B7 in my Dodge?

You can start by checking the fuse for the rear left window, inspecting the wiring connections, testing the master switch for continuity, and examining the window regulator for any faults.

5. Can I repair OBDII code B18B7 in my Dodge myself?

Depending on your automotive expertise, you may be able to repair this issue yourself by replacing the faulty master switch, fixing any wiring problems, or addressing issues with the window regulator.

6. Is it safe to continue driving my Dodge with OBDII code B18B7 present?

It is generally not recommended to drive with this code active, as it can affect the functionality of the rear left window and potentially lead to safety issues or further damage.

7. Will resetting the OBDII code B18B7 make the issue go away in my Dodge?

Resetting the code may temporarily clear the warning light, but it will not fix the underlying problem causing the malfunction in the master switch for the rear left window.

8. How much does it typically cost to repair OBDII code B18B7 in a Dodge?

Repair costs can vary depending on the exact cause of the issue, but replacing a faulty master switch or addressing wiring problems can range from $100 to $300 or more.

9. Can OBDII code B18B7 affect other electrical components in my Dodge?

While this code specifically relates to the master switch for the rear left window, electrical issues in one part of the vehicle can sometimes impact other components, so it's important to address the problem promptly.

10. Should I consult a professional mechanic for help with OBDII code B18B7 in my Dodge?

If you are unsure about diagnosing or repairing the issue yourself, it is advisable to seek the expertise of a qualified mechanic who can accurately identify the cause of the problem and perform the necessary repairs.