B144B:04 Code - Run/Crank Power Relay Circuit Open
Quick Answer
The Body Control Module (BCM) controls the Ignition Main Relay (underhood) and the Ignition Main Relay (instrument panel left) through their control circuits by applying a voltage to the ignition run/crank relay coil control circuit. 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
- B144B:04 indicates Run/Crank 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.
Code B144B:04 Description
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.
What are the Possible Causes of the DTC B144B: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 B144B: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 B144B: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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Frequently Asked Questions about B144B:04 Code
What does the OBDII code B144B:04 mean?
The code B144B:04 indicates an issue with the Run/Crank Power Relay Circuit, specifically an open circuit preventing proper relay operation.
What are common symptoms of code B144B:04?
Symptoms may include difficulty starting the engine, intermittent loss of power, or the ignition system not responding properly.
What causes the B144B:04 code to appear?
Common causes include a faulty Run/Crank power relay, damaged wiring or connectors in the circuit, or issues with the fuse related to the relay circuit.
Can a bad Run/Crank power relay trigger the B144B:04 code?
Yes, a malfunctioning relay can disrupt the circuit, causing the open condition and triggering this code.
How do you diagnose the B144B:04 code?
Diagnosis involves inspecting the relay, wiring, and connectors for damage or corrosion, testing the relay for proper operation, and checking associated fuses.
Can the B144B:04 code prevent the vehicle from starting?
Yes, if the circuit is open, the ignition system may not receive power, potentially preventing the engine from starting.
What tools are required to fix the B144B:04 code?
You may need a multimeter to test continuity, a relay tester, and basic hand tools to inspect and replace components.
Is it safe to drive with the B144B:04 code?
Driving may not be safe as the issue could lead to intermittent power loss or difficulty starting the vehicle.
How much does it cost to fix the B144B:04 code?
Repair costs vary depending on the issue, but replacing the relay typically costs $20-$50, while wiring repairs may incur additional labor charges.
Can a DIY repair resolve the B144B:04 code?
Yes, if you have basic automotive repair skills, you can inspect and replace the relay or repair damaged wiring to resolve the issue.
Discuss the causes and fixes for B144B:04 OBDII Code
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