B144B 2014 GMC Sierra Code - Run/Crank Power Relay Circuit
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 2014 GMC Sierra indicates Run/Crank Power Relay Circuit.
- 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 2014 GMC Sierra Description
The Diagnostic Trouble Code (DTC) will be set when there is a fault in the Ignition Main Relay Circuit.
What are the Possible Causes of the DTC B144B 2014 GMC Sierra?
- 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 2014 GMC Sierra?
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 2014 GMC Sierra 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 2014 GMC Sierra Code
1. What does the OBDII code B144B mean on a 2014 GMC Sierra?
The code B144B indicates a fault in the Run/Crank Power Relay Circuit, which is responsible for controlling power during the vehicle's run and crank operations.
2. What are the common symptoms of the B144B code?
Common symptoms include the engine failing to start, intermittent stalling, or electrical components not functioning properly during startup.
3. What causes the B144B Run/Crank Power Relay Circuit code?
Possible causes include a faulty run/crank power relay, damaged wiring or connectors in the circuit, or a malfunctioning body control module (BCM).
4. How do I diagnose the B144B code on my GMC Sierra?
Begin by inspecting the relay, wiring, and connectors for damage or corrosion. Use a multimeter to test the circuit's continuity and check for proper relay operation. Scan the BCM for additional codes.
5. Can a bad battery cause the B144B code?
Yes, a weak or faulty battery can lead to voltage issues that may trigger this code, as the relay requires stable power to function correctly.
6. Is it safe to drive with the B144B code active?
It is not recommended to drive with this code active, as it may cause starting issues or intermittent stalling, which could be unsafe.
7. How do I fix the B144B code on a 2014 GMC Sierra?
Repairs may involve replacing the run/crank power relay, repairing damaged wiring or connectors, or reprogramming or replacing the BCM if necessary.
8. How much does it cost to fix the B144B code?
Repair costs vary but typically range from $50 to $300, depending on whether you need to replace the relay, repair wiring, or address BCM issues.
9. Can I clear the B144B code without fixing the issue?
Clearing the code without fixing the underlying problem is not recommended, as the issue will likely reoccur and could affect the vehicle's performance.
10. What tools are needed to troubleshoot the B144B code?
You’ll need an OBDII scanner, a multimeter for electrical testing, and potentially wiring diagrams for the vehicle to trace the circuit properly.
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