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Engine-Codes – Generic – B144C

B144C Code - Inverted Run/Start Power Relay Circuit

Quick Answer

The B144C diagnostic trouble code (DTC) refers to an issue with the Inverted Run/Start Power Relay Circuit in the vehicle. Common causes include Faulty power relay, Wiring issues or short circuits, Blown fuse related to the power relay. 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
B144C indicates Inverted Run/Start Power Relay Circuit.
Common causes
Common causes include Faulty power relay, Wiring issues or short circuits, Blown fuse related to the power relay.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code B144C Description

The B144C diagnostic trouble code (DTC) refers to an issue with the Inverted Run/Start Power Relay Circuit in the vehicle. This code indicates that there is a problem with the circuit responsible for controlling the power relay that is used to start the vehicle. The power relay is an essential component in the electrical system of the vehicle, as it is responsible for supplying power to the starter motor and ignition system when the vehicle is being started.

OBDII Code B144C - Inverted Run/Start Power Relay Circuit
B144C Code - Inverted Run/Start Power Relay Circuit

Common Causes of B144C

  1. Faulty power relay
  2. Wiring issues or short circuits
  3. Blown fuse related to the power relay
  4. Malfunctioning control module
  5. Poor electrical connections

Symptoms of B144C

  1. Difficulty starting the vehicle
  2. Engine stalling while driving
  3. Intermittent loss of power
  4. Illumination of the check engine light
  5. Unusual noises coming from the engine bay

How to Fix B144C

  1. Perform a thorough inspection of the power relay circuit to identify the root cause of the issue.
  2. Test the power relay and replace it if necessary.
  3. Check for any wiring issues or shorts in the circuit and repair as needed.
  4. Inspect and replace any blown fuses related to the power relay.
  5. Reset the vehicle's computer system to clear the DTC and ensure the issue has been resolved.

Cost to Fix B144C

The cost of repairing a B144C code can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay anywhere from $100 to $300 for parts and labor. Keep in mind that diagnostic time and labor rates can vary, so it's best to get a quote from a reputable auto repair shop in your area. Remember to factor in additional costs for any necessary parts or components that may need to be replaced during the repair process.

What does this mean?

Tech Notes for B144C

B144C 01 Inverted Run/Start Power Relay Circuit Short to Battery

B144C 06 Inverted Run/Start Power Relay Circuit Low Voltage/Open

Need more information about the B144C code?

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Code B144C Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B144C Code

1. What are the common symptoms of OBDII code B144C (Inverted Run/Start Power Relay Circuit)?

The common symptoms of OBDII code B144C include difficulty starting the vehicle, intermittent or no engine cranking, and potential issues with the ignition system.

2. What are the possible causes of OBDII code B144C?

Possible causes of OBDII code B144C include a faulty power relay, damaged wiring or connectors in the circuit, a defective ignition switch, or a problem with the engine control module (ECM).

3. How can I diagnose the Inverted Run/Start Power Relay Circuit issue associated with code B144C?

To diagnose the issue, you can use a diagnostic scanner to read the trouble code, inspect the power relay and related components, check for loose or damaged wiring, and perform continuity tests to identify any faulty components.

4. Can I still drive my vehicle with OBDII code B144C present?

It is not recommended to drive the vehicle with OBDII code B144C present, as it can lead to potential starting issues and may eventually cause the vehicle to stall unexpectedly.

5. How can I repair OBDII code B144C at home?

You can attempt to repair OBDII code B144C at home by checking and replacing the faulty power relay, repairing any damaged wiring, and ensuring all connections are secure. However, if you are unsure, it is best to seek professional assistance.

6. Will resetting the OBDII code B144C make it go away permanently?

Resetting the OBDII code B144C may temporarily clear the code, but if the underlying issue causing the code is not addressed, it is likely to return. It is important to diagnose and repair the root cause of the problem.

7. Can a low battery voltage trigger OBDII code B144C?

Yes, a low battery voltage can potentially trigger OBDII code B144C as it can affect the proper functioning of the power relay and other electrical components in the circuit.

8. Is OBDII code B144C specific to certain vehicle makes and models?

OBDII code B144C (Inverted Run/Start Power Relay Circuit) can occur in various vehicle makes and models that are equipped with an OBDII system. It is important to consult the specific vehicle's service manual for accurate diagnosis and repair information.

9. How much should I expect to pay for professional repair of OBDII code B144C?

The cost of professional repair for OBDII code B144C can vary depending on the labor rates in your area, the extent of the issue, and the price of any replacement parts needed. It is advisable to obtain quotes from different repair shops.

10. Can a DIY enthusiast with basic automotive knowledge fix OBDII code B144C?

A DIY enthusiast with basic automotive knowledge may be able to fix OBDII code B144C by following step-by-step guides, watching tutorials, and using appropriate tools. However, if unsure, it is best to consult a professional mechanic for assistance.

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