B144B:01 Code - Run/Crank Power Relay Circuit Short to Voltage
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:01 indicates Run/Crank Power Relay Circuit Short to Voltage.
- 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:01 Description
The Diagnostic Trouble Code (DTC) will be set when the ignition output is not active and a short to battery is detected 3 consecutive times on the ignition voltage circuit.
What are the Possible Causes of the DTC B144B:01?
- 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:01?
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:01 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:01 Code
What does the OBDII code B144B:01 mean?
This code indicates a "Run/Crank Power Relay Circuit Short to Voltage," meaning there is an electrical issue where the circuit is receiving voltage when it shouldn't.
What are the common symptoms of code B144B:01?
Symptoms may include difficulty starting the vehicle, intermittent electrical malfunctions, or the engine staying in the crank position longer than normal.
What causes the B144B:01 code?
The code is typically caused by wiring issues, such as damaged insulation, short circuits, or a faulty run/crank power relay.
Can a bad relay cause the B144B:01 code?
Yes, a malfunctioning run/crank power relay can cause this code if it's stuck or improperly passing voltage to the circuit.
How do you diagnose the B144B:01 code?
Start by visually inspecting the wiring and connectors for damage or corrosion, then test the relay and circuit for voltage irregularities using a multimeter.
Is it safe to continue driving with the B144B:01 code?
Driving with this code is not recommended, as it can lead to further electrical issues or prevent the vehicle from starting.
How do you fix the B144B:01 code?
Repairs may involve replacing the run/crank relay, repairing damaged wiring, or addressing any short circuits in the affected circuit.
Can a blown fuse trigger the B144B:01 code?
While unlikely, a fuse related to the circuit could contribute to electrical malfunctions that result in this code.
Does this code affect all vehicles the same way?
No, the specific symptoms and repair procedures can vary depending on the make and model of the vehicle.
Should you clear the code without fixing the underlying issue?
No, clearing the code without addressing the problem will likely result in the code reappearing and potentially causing further issues.
Discuss the causes and fixes for B144B:01 OBDII Code
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