AutoCodes – KIA – B251E KIA

B251E KIA Code - Left Stop Lamp Circuit Short to Ground

Quick Answer

The B251E code indicates that the Integrated Central Control Unit (ICU) detected a short-to-ground condition in the left stop lamp circuit. Common causes include Faulty Left Stop Lamp Assembly, Left Stop Lamp harness is open or shorted, Left Stop Lamp 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: B251E KIA indicates Left Stop Lamp Circuit Short to Ground.
Common causes: Common causes include Faulty Left Stop Lamp Assembly, Left Stop Lamp harness is open or shorted, Left Stop Lamp 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 10

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 Jun 01, 2026

Description
Possible Causes
How To Fix
Cost to Diagnose
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Code B251E KIA Description

The B251E code indicates that the Integrated Central Control Unit (ICU) detected a short-to-ground condition in the left stop lamp circuit. This means the control module detected an abnormally low resistance path in the electrical circuit that operates the left brake light. The fault may be caused by a damaged wire, a corroded connector, a faulty bulb socket, water intrusion in the tail lamp assembly, or an internal short within the brake light bulb itself.

When this code is active, the left brake light may fail to illuminate properly, remain illuminated continuously, or cause intermittent lighting issues. Since the code in the report is stored as a history code, the condition may have been temporary and could have been triggered by a low battery voltage event, wiring moisture, or a poor electrical connection. Inspecting the bulb, socket, connectors, and rear lamp wiring is recommended if the code returns.

OBDII Code B251E KIA - Left Stop Lamp Circuit Short to Ground - AutoCodes.com — B251E KIA Code - Left Stop Lamp Circuit Short to Ground

What does this mean?

What are the Possible Causes of the DTC B251E KIA?

Faulty Left Stop Lamp Assembly
Left Stop Lamp harness is open or shorted
Left Stop Lamp circuit poor electrical connection
Faulty Integrated Central Control Unit (ICU)

How to Fix the DTC B251E KIA?

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 B251E KIA 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.