AutoCodes – Generic – B2818

B2818 Code - Headlamp Leveling Sensor Supply Circuit High

Quick Answer

The Diagnostic Trouble Code (DTC) sets when the Headlamp Leveling Module (HIDT) detects a high condition on the output circuit. Common causes include Faulty Headlamp Leveling Switch, Headlamp Leveling Switch harness is open or shorted, Headlamp Leveling 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: B2818 indicates Headlamp Leveling Sensor Supply Circuit High.
Common causes: Common causes include Faulty Headlamp Leveling Switch, Headlamp Leveling Switch harness is open or shorted, Headlamp Leveling 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 1,672

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 Feb 13, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2818 Description

The Diagnostic Trouble Code (DTC) sets when the Headlamp Leveling Module (HIDT) detects a high condition on the output circuit.

OBDII Code B2818 - Headlamp Leveling Sensor Supply Circuit High - AutoCodes.com — B2818 Code - Headlamp Leveling Sensor Supply Circuit High

What does this mean?

What are the Possible Causes of the DTC B2818?

Faulty Headlamp Leveling Switch
Headlamp Leveling Switch harness is open or shorted
Headlamp Leveling Switch circuit poor electrical connection
Faulty Headlamp Leveling Module (HIDT)

How to Fix the DTC B2818?

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 B2818 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 B2818 code?

Need more information on how to fix the B2818 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2818 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2818 Chrysler — Headlamp Leveling Sensor Supply Circuit High
B2818 Dodge — Headlamp Leveling Sensor Supply Circuit High
B2818 Jeep — Headlamp Leveling Sensor Supply Circuit High
B2818 RAM — Headlamp Leveling Sensor Supply 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 B2818 Code

1. What does OBDII code B2818 mean?

Code B2818 indicates a high voltage issue in the headlamp leveling sensor supply circuit, which may affect the automatic adjustment of headlamps.

2. What are the common symptoms of code B2818?

Symptoms include malfunctioning or non-responsive headlamp leveling, a warning light on the dashboard, and uneven headlight beams.

3. What causes code B2818?

Common causes include a faulty headlamp leveling sensor, damaged wiring, corroded connectors, or a malfunctioning control module.

4. Can I still drive with code B2818?

Yes, but driving with improperly leveled headlights can reduce visibility and create a safety hazard, especially at night or in adverse conditions.

5. How is code B2818 diagnosed?

A technician will inspect the wiring, connectors, and sensor for damage or corrosion and use a scan tool to monitor sensor voltage and pinpoint the fault.

6. How do you fix code B2818?

Repairs may involve replacing the headlamp leveling sensor, repairing damaged wiring, cleaning corroded connectors, or updating/replacing the control module.

7. How much does it cost to repair code B2818?

Costs can vary, but replacing a headlamp leveling sensor typically ranges from $150 to $300, depending on the vehicle and labor rates.

8. Can I fix code B2818 myself?

If you have automotive electrical knowledge, you can check for loose connections or damaged wiring. However, sensor replacement or module updates may require professional tools.

9. What tools are needed to troubleshoot code B2818?

A multimeter to check voltage, a scan tool to read live data, and a wiring diagram for the headlamp leveling system are commonly required.

10. Will clearing the code fix B2818?

Clearing the code without addressing the underlying issue will only temporarily remove the warning. The code will likely return if the problem persists.