AutoCodes – Chrysler – B18B7 Chrysler

B18B7 Chrysler 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 Chrysler 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 664

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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

What does this mean?

What are the Possible Causes of the DTC B18B7 Chrysler?

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 Chrysler?

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 Chrysler 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 Chrysler Code

1. What does the OBDII code B18B7 for the Chrysler "Master Switch Rear Left Window Switch" indicate?

The code B18B7 specifically points to an issue with the master switch for the rear left window in a Chrysler vehicle.

2. What are some common symptoms of a B18B7 fault in a Chrysler?

Common symptoms may include the rear left window not responding to the switch, erratic window operation, or complete failure of the rear left window to move up or down.

3. What are the possible causes of the B18B7 code in a Chrysler?

Potential causes could be a faulty master switch, wiring issues, a malfunctioning window motor, or a problem with the window regulator.

4. How can I diagnose a B18B7 fault in my Chrysler?

Diagnosing a B18B7 fault typically involves checking the master switch for proper operation, inspecting the wiring for any damage, testing the window motor, and ensuring the window regulator is functioning correctly.

5. Can I repair a B18B7 fault in my Chrysler myself?

Depending on the exact cause of the B18B7 code, some repairs may be DIY-friendly, such as replacing a faulty master switch or a blown fuse. However, more complex issues like wiring faults may require professional diagnosis and repair.

6. Is it safe to continue driving with a B18B7 fault in my Chrysler?

It is not recommended to drive with a B18B7 fault, especially if it affects the operation of a window. A malfunctioning window can pose safety risks and should be addressed promptly.

7. How much does it typically cost to repair a B18B7 fault in a Chrysler?

The cost of repairing a B18B7 fault can vary depending on the cause of the issue and whether you opt for DIY repairs or professional help. Costs may include parts and labor.

8. Can a B18B7 fault cause other electrical problems in my Chrysler?

While the B18B7 code itself is specific to the rear left window switch, electrical issues in a vehicle can sometimes be interconnected. It's important to address the B18B7 fault to prevent potential further electrical problems.

9. Are there any preventive measures to avoid encountering a B18B7 fault in a Chrysler?

Regularly checking and maintaining the window switches, keeping an eye out for any unusual window behavior, and addressing minor issues promptly can help prevent a B18B7 fault from occurring.

10. How long does it usually take to repair a B18B7 fault in a Chrysler?

The repair time for a B18B7 fault can vary depending on the complexity of the issue and the availability of parts. Simple fixes like replacing a switch may take less time compared to diagnosing and repairing wiring problems.