AutoCodes – Generic – B18E4

B18E4 Code - Power Liftgate Front Zone Switch Circuit High

Quick Answer

The Power Liftgate Module monitors the Power Liftgate Front Zone Switch Circuit. Common causes include Faulty Liftgate Switch Sense, Liftgate Switch Sense harness is open or shorted, Liftgate Switch Sense 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: B18E4 indicates Power Liftgate Front Zone Switch Circuit High.
Common causes: Common causes include Faulty Liftgate Switch Sense, Liftgate Switch Sense harness is open or shorted, Liftgate Switch Sense 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 988

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 B18E4 Description

The Power Liftgate Module monitors the Power Liftgate Front Zone Switch Circuit. When the Power Liftgate Module senses a voltage over 5.01 volts on the (G25) Liftgate Switch Sense circuit for longer than 10 seconds, this code will set.

OBDII Code B18E4 - Power Liftgate Front Zone Switch Circuit High - AutoCodes.com — B18E4 Code - Power Liftgate Front Zone Switch Circuit High

What does this mean?

What are the Possible Causes of the DTC B18E4?

Faulty Liftgate Switch Sense
Liftgate Switch Sense harness is open or shorted
Liftgate Switch Sense circuit poor electrical connection
Faulty Power Liftgate Module

How to Fix the DTC B18E4?

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 B18E4 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 B18E4 code?

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Need Help with the Code?

Get the B18E4 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B18E4 Chrysler — Power Liftgate Front Zone Switch Circuit High
B18E4 Dodge — Power Liftgate Front Zone Switch Circuit High
B18E4 Jeep — Power Liftgate Front Zone Switch Circuit High
B18E4 RAM — Power Liftgate Front Zone Switch Circuit High

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 B18E4 Code

1. What are the common symptoms of OBDII code B18E4 (Power Liftgate Front Zone Switch Circuit High)?

- Common symptoms include the power liftgate not responding to the front zone switch, erratic behavior of the liftgate, and warning lights on the dashboard.

2. What can cause the OBDII code B18E4 to trigger in a vehicle?

- The code can be triggered by issues such as a faulty front zone switch, damaged wiring harness, poor electrical connections, or a malfunctioning liftgate control module.

3. How can I diagnose the Power Liftgate Front Zone Switch Circuit High error code?

- You can diagnose the code by performing a visual inspection of the wiring, testing the front zone switch for functionality, and using a scan tool to check for any related fault codes in the system.

4. Is it safe to continue driving with the B18E4 fault code present?

- It is not recommended to continue driving with the B18E4 code as it can affect the operation of the power liftgate, leading to potential safety issues or further damage to the vehicle.

5. Can I repair the Power Liftgate Front Zone Switch Circuit High issue myself?

- Depending on your skill level and access to tools, you may be able to repair the issue yourself by replacing the front zone switch, repairing damaged wiring, or addressing any loose connections.

6. How much does it typically cost to fix the B18E4 code at a repair shop?

- The cost of fixing the B18E4 code at a repair shop can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

7. What are some tips to prevent the recurrence of the B18E4 fault code?

- To prevent the B18E4 code from recurring, it's important to ensure proper maintenance of the power liftgate system, regularly check for any signs of wear or damage, and address any electrical issues promptly.

8. Can the B18E4 code be intermittent or permanent?

- The B18E4 code can manifest as either intermittent or permanent, depending on the underlying cause of the issue and the specific conditions triggering the fault.

9. Will resetting the OBDII system clear the B18E4 fault code?

- Resetting the OBDII system may temporarily clear the B18E4 code, but if the underlying issue is not addressed, the code is likely to reappear once the problem resurfaces.

10. How crucial is it to address the B18E4 fault code promptly?

- It is important to address the B18E4 fault code promptly to ensure the proper functioning of the power liftgate system, prevent potential safety hazards, and avoid more extensive repairs in the future.