AutoCodes – Lexus – B1479 Lexus

B1479 Lexus Code - Flow Sensor Circuit

Quick Answer

The Flow Sensor is built into the compressor and outputs a signal indicating the flow rate of the refrigerant. Common causes include Faulty Flow Sensor (Built into the compressor), Flow Sensor harness is open or shorted, Flow Sensor 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: B1479 Lexus indicates Flow Sensor Circuit.
Common causes: Common causes include Faulty Flow Sensor (Built into the compressor), Flow Sensor harness is open or shorted, Flow Sensor 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.

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Code Popularity 8,210

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 12, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1479 Lexus Description

The Flow Sensor is built into the compressor and outputs a signal indicating the flow rate of the refrigerant. The Air Conditioning Amplifier converts the received signal to refrigerant flow rate data according to the characteristics of the sensor, which it then sends to the ECM via CAN communication.

OBDII Code B1479 Lexus - Flow Sensor Circuit - AutoCodes.com — B1479 Lexus Code - Flow Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC B1479 Lexus?

Faulty Flow Sensor (Built into the compressor)
Flow Sensor harness is open or shorted
Flow Sensor circuit poor electrical connection
Faulty Air Conditioning Amplifier

How to Fix the DTC B1479 Lexus?

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 B1479 Lexus 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 B1479 Lexus code?

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Need Help with the Code?

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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 B1479 Lexus Code

1. What are the common symptoms of OBDII code B1479 in a Lexus related to the Flow Sensor Circuit?

- Common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and potential stalling.

2. What typically causes the OBDII code B1479 Flow Sensor Circuit issue in a Lexus?

- The code B1479 in a Lexus is often triggered by a faulty Mass Air Flow (MAF) sensor, damaged wiring, or a sensor circuit malfunction.

3. How can I diagnose the OBDII code B1479 in my Lexus related to the Flow Sensor Circuit?

- To diagnose B1479, you can use an OBDII scanner to read the fault codes, inspect the MAF sensor for any visible damage, and check the wiring connections for integrity.

4. Can a dirty air filter cause the OBDII code B1479 in a Lexus?

- Yes, a clogged or dirty air filter can disrupt airflow readings and potentially trigger the B1479 code related to the Flow Sensor Circuit.

5. What are some repair tips for resolving the OBDII code B1479 in a Lexus?

- Repair tips include cleaning or replacing the MAF sensor, checking and repairing any damaged wiring, and ensuring proper connection of all related components.

6. Is it safe to continue driving my Lexus with the OBDII code B1479 Flow Sensor Circuit issue?

- It is not recommended to drive your Lexus with the B1479 code present, as it can lead to further engine damage and potentially unsafe driving conditions.

7. Can I reset the OBDII code B1479 in my Lexus without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it is essential to address the root cause of the problem to prevent the code from reoccurring.

8. Is the OBDII code B1479 related to the Flow Sensor Circuit a common issue in Lexus vehicles?

- The B1479 code related to the Flow Sensor Circuit is not uncommon in Lexus vehicles, especially in older models or those with high mileage.

9. Will a dealership or mechanic be able to fix the OBDII code B1479 in my Lexus?

- A dealership or qualified mechanic with experience in Lexus vehicles should be able to diagnose and repair the B1479 code related to the Flow Sensor Circuit effectively.

10. Are there any DIY solutions for addressing the OBDII code B1479 in a Lexus?

- While some basic inspections and cleaning of components can be done DIY, it is recommended to consult a professional for a thorough diagnosis and repair of the B1479 code in a Lexus.