B144B 2018 GMC Sierra Code - Run/Crank Power Relay Circuit
Quick Answer
The B144B diagnostic trouble code for the 2018 GMC Sierra relates to the Run/Crank Power Relay Circuit. Common causes include Faulty power relay, Wiring issues or shorts in the power relay circuit, Corrosion or poor connections in the relay circuit. 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 2018 GMC Sierra indicates Run/Crank Power Relay Circuit.
- Common causes
- Common causes include Faulty power relay, Wiring issues or shorts in the power relay circuit, Corrosion or poor connections in the relay circuit.
- 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 B144B 2018 GMC Sierra Description
The B144B diagnostic trouble code for the 2018 GMC Sierra relates to the Run/Crank Power Relay Circuit. This code indicates that there is a malfunction in the power relay circuit responsible for initiating the vehicle's run and crank functions. The power relay is crucial for ensuring that the vehicle can start and run smoothly, as it is responsible for supplying power to various components such as the fuel pump, ignition system, and other essential systems.
Common Causes of B144B 2018 GMC Sierra
- Faulty power relay
- Wiring issues or shorts in the power relay circuit
- Corrosion or poor connections in the relay circuit
- Electrical system issues
- Faulty ECU (Engine Control Unit)
Symptoms of B144B 2018 GMC Sierra
- Difficulty starting the vehicle
- Intermittent starting problems
- Engine stalling or misfiring
- Check engine light illuminated
- Loss of power while driving
How to Fix B144B 2018 GMC Sierra
- Diagnose the issue by using a scan tool to retrieve the trouble code and further pinpoint the exact cause of the problem.
- Inspect the power relay and related wiring for any visible damage, corrosion, or loose connections. Replace the power relay if necessary.
- Test the relay circuit with a multimeter to ensure proper voltage is being supplied to the components.
- Clear the trouble code from the vehicle's ECU and test the vehicle to verify that the issue has been resolved.
- If the problem persists, further diagnostics may be required to identify any underlying electrical system issues.
Cost to Fix B144B 2018 GMC Sierra
The cost of repairing a Run/Crank Power Relay Circuit issue in a 2018 GMC Sierra can vary depending on the extent of the problem and the specific parts that need to be replaced. On average, the cost of replacing a power relay can range from $50 to $150, while labor costs can range from $80 to $150 per hour. Overall, the total repair cost for this issue may range from $150 to $400, but it's essential to consult with a professional mechanic to get an accurate estimate based on your specific vehicle and location.
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Frequently Asked Questions about B144B 2018 GMC Sierra Code
1. What does the OBDII code B144B mean on a 2018 GMC Sierra?
The code B144B indicates an issue with the Run/Crank Power Relay Circuit, typically involving a malfunction in the relay or its associated wiring.
2. What are the common symptoms of the B144B code?
Symptoms may include the engine not starting, intermittent starting issues, or the vehicle stalling while driving.
3. What causes the B144B code in a 2018 GMC Sierra?
Common causes include a faulty run/crank relay, damaged wiring or connectors in the circuit, or a failure in the Body Control Module (BCM).
4. How do I diagnose the B144B code?
Start by checking the relay itself, inspecting the wiring and connectors for damage, and testing the circuit for proper voltage. If these are fine, the BCM should be examined.
5. Can a bad battery cause the B144B code?
Yes, a weak or faulty battery can cause voltage-related issues in the run/crank relay circuit, potentially triggering the B144B code.
6. How do I fix the B144B code on a GMC Sierra?
Repairs may include replacing the run/crank relay, repairing damaged wiring or connectors, or reprogramming or replacing the BCM if needed.
7. Is it safe to drive with a B144B code?
It is not recommended to drive with this code, as it can cause starting issues or unexpected stalling while driving, creating safety concerns.
8. How much does it cost to repair the B144B code?
Repair costs can vary but typically range from $50 to $200 for relay or wiring repairs, and up to $1,000 if the BCM needs replacement or reprogramming.
9. Can I clear the B144B code without fixing the issue?
Clearing the code without addressing the root cause is not recommended, as the issue will likely return and could lead to further problems.
10. Do I need a professional mechanic to fix the B144B code?
While some basic checks like inspecting the relay or wiring can be done by a DIYer, more complex issues like BCM diagnostics or programming require professional tools and expertise.
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