AutoCodes – Generic – B144A:04

B144A:04 Code - Run Power Relay Circuit Open

Quick Answer

The body control module (BCM) feeds the ignition circuit by applying voltage when the ignition is in the ON position. Common causes include Faulty Ignition Main Relay, Ignition Main Relay harness is open or shorted, Ignition Main Relay 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: B144A:04 indicates Run Power Relay Circuit Open.
Common causes: Common causes include Faulty Ignition Main Relay, Ignition Main Relay harness is open or shorted, Ignition Main Relay 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 809

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 Apr 19, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B144A:04 Description

The body control module (BCM) feeds the ignition circuit by applying voltage when the ignition is in the ON position. The Diagnostic Trouble Code (DTC) will be set when the ignition output is not active and an open is detected 20 consecutive times on the ignition voltage circuit.

OBDII Code B144A:04 - Run Power Relay Circuit Open - AutoCodes.com — B144A:04 Code - Run Power Relay Circuit Open

What does this mean?

What are the Possible Causes of the DTC B144A:04?

Faulty Ignition Main Relay
Ignition Main Relay harness is open or shorted
Ignition Main Relay circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B144A:04?

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 B144A:04 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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Need Help with the Code?

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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 B144A:04 Code

1. What does the OBDII code B144A:04 mean?

The code B144A:04 indicates an open circuit issue in the run power relay circuit, which is responsible for supplying power to key vehicle systems during operation.

2. What are the common symptoms of the B144A:04 code?

Symptoms may include failure of certain electrical components to operate, the engine not starting, or intermittent loss of power to systems like the ignition or dashboard.

3. What causes the B144A:04 code?

Common causes include a faulty run power relay, damaged wiring or connectors in the relay circuit, or a malfunction in the power distribution module.

4. Can driving with the B144A:04 code cause further damage?

Yes, driving with this code can lead to unreliable vehicle performance or failure of critical systems, potentially leaving the vehicle inoperable.

5. How can I diagnose the B144A:04 code?

Start by inspecting the run power relay and its associated wiring for visible damage or loose connections. Use a multimeter to test the relay and check for continuity in the circuit.

6. How is the B144A:04 code fixed?

Repairs may involve replacing a faulty run power relay, repairing or replacing damaged wiring, or addressing issues in the power distribution module.

7. Can a dead battery cause the B144A:04 code?

A dead or weak battery is unlikely to directly cause this code, but poor electrical connections or power disruptions can contribute to the issue.

8. How much does it cost to fix the B144A:04 code?

Repair costs can vary, ranging from $50 to $150 for a relay replacement to $200 or more if wiring or module repairs are needed.

9. Will clearing the B144A:04 code with a scanner fix the issue?

Clearing the code may temporarily turn off the warning, but the underlying issue must be resolved to prevent the code from returning.

10. Can I replace the run power relay myself to fix the B144A:04 code?

Yes, if you're comfortable working with automotive relays and electrical components, replacing the run power relay is often a straightforward DIY task.