B144B 2017 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 2017 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 2017 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 2017 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 2017 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 2017 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.
Need more information about the B144B 2017 GMC Sierra code?
Need more information on how to fix the B144B 2017 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B144B 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B144B 2017 GMC Sierra Code
1. What is OBDII code B144B on a 2017 GMC Sierra?
Code B144B indicates a problem with the Run/Crank Power Relay Circuit, suggesting an issue in the electrical path that controls the vehicle's ability to engage the starter motor during the run or crank phase.
2. What symptoms might I notice if my 2017 GMC Sierra has the B144B code?
Symptoms can include the engine not starting, the starter not engaging, or the vehicle stalling shortly after starting. You might also notice general electrical issues or the check engine light may illuminate.
3. What are common causes of the B144B code in a 2017 GMC Sierra?
Common causes include a faulty relay, issues with the relay control circuit such as frayed or broken wires, poor relay connections, or problems with the fuse related to this circuit.
4. How can I diagnose the B144B code on my 2017 GMC Sierra?
Diagnosing this code typically involves checking the run/crank relay for damage or malfunction, inspecting the relay socket and connections for corrosion or looseness, and testing the continuity and voltage in the relay circuit with a multimeter.
5. What steps should be taken to fix code B144B in a 2017 GMC Sierra?
Repair steps may include replacing the faulty run/crank relay, repairing or replacing damaged wiring within the circuit, ensuring all connections are clean and secure, and replacing any blown fuses.
6. Is it safe to drive my 2017 GMC Sierra with the B144B code active?
Driving with this code active is not recommended as it can lead to situations where your vehicle may not start or could stall while driving, potentially causing safety issues.
7. Can a B144B code drain the battery on my 2017 GMC Sierra?
Yes, if the run/crank relay is stuck in the "on" position, it can lead to continuous power draw, which may drain the battery.
8. What tools are required to diagnose and repair the B144B code on a 2017 GMC Sierra?
Tools needed may include a multimeter for testing electrical components, a basic set of hand tools for accessing the relay and circuit, and possibly a scan tool for deeper diagnostic analysis.
9. How urgent is it to address the B144B code in a 2017 GMC Sierra?
Addressing this code should be considered urgent, as failing to do so can result in your vehicle not starting or experiencing serious operational issues.
10. Could ignoring the B144B code lead to other issues in my 2017 GMC Sierra?
Ignoring this issue can lead to increased strain on other starting and electrical system components, potentially causing further damage or failures in associated systems.
Discuss the causes and fixes for B144B 2017 GMC Sierra OBDII Code
Code B144B 2017 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
