AutoCodes – Lexus – B2239 Lexus

B2239 Lexus Code - Rear Right Center Sensor Malfunction

Quick Answer

The No. Common causes include Faulty Rear Right Center Sensor, Rear Right Center Sensor harness is open or shorted, Rear Right Center 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: B2239 Lexus indicates Rear Right Center Sensor Malfunction.
Common causes: Common causes include Faulty Rear Right Center Sensor, Rear Right Center Sensor harness is open or shorted, Rear Right Center 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 1,462

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 Oct 09, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2239 Lexus Description

The No. 3 Ultrasonic Sensor (Rear Right Center Sensor) is installed on the front bumper. The Clearance Warning ECU detects obstacles based on signals received from the Rear Right Center Sensor. If the Rear Right Center Sensor circuit has an open, short or other malfunction, it will not function normally. The Diagnostic Trouble Code (DTC) sets if a malfunction of No. 3 Ultrasonic Sensor (Rear Right Center Sensor).

OBDII Code B2239 Lexus - Rear Right Center Sensor Malfunction - AutoCodes.com — B2239 Lexus Code - Rear Right Center Sensor Malfunction

What does this mean?

What are the Possible Causes of the DTC B2239 Lexus?

Faulty Rear Right Center Sensor
Rear Right Center Sensor harness is open or shorted
Rear Right Center Sensor circuit poor electrical connection
Faulty Clearance Warning ECU

How to Fix the DTC B2239 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 B2239 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.

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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 B2239 Lexus Code

1. What does the OBDII code B2239 indicate on a Lexus?

The B2239 code on a Lexus indicates a malfunction with the rear right center sensor, which is typically part of the vehicleâ€™s safety or collision avoidance system.

2. What symptoms may be observed if a Lexus displays the B2239 code?

Symptoms can include the malfunction indicator light (MIL) turning on, potential issues with the rear parking assist system, and possible beeping or warnings when engaging reverse.

3. What are common causes for the B2239 code in a Lexus?

Common causes for this code include damaged sensor wiring, a faulty rear right center sensor, dirt or debris obstructing the sensor, or a malfunctioning control unit.

4. How can I diagnose the B2239 code on my Lexus?

Diagnosing this code typically involves using a scan tool to confirm the existence of the B2239 code, visually inspecting the sensor and its wiring for damage or obstructions, and checking the electrical connections for corrosion or loose connections.

5. What steps should be taken to fix the B2239 code on a Lexus?

Repair steps may include cleaning the sensor, repairing or replacing damaged wiring, securing loose connections, or replacing the faulty sensor.

6. Is it safe to drive a Lexus with a B2239 code?

While you may be able to drive with this error, the functionality of the parking assist or collision avoidance systems may be compromised, which could increase the risk of an accident, especially when reversing.

7. How urgent is it to address a B2239 code in a Lexus?

It is advisable to address this issue as soon as possible to ensure the proper function of safety systems and to avoid potential accidents due to sensor malfunction.

8. Can a dirty sensor cause a B2239 code to appear on a Lexus?

Yes, dirt, mud, or snow covering the sensor can cause the B2239 code to appear. Cleaning the sensor might resolve the issue if there are no other underlying faults.

9. What tools are required to diagnose and repair a B2239 code on a Lexus?

Tools required may include a diagnostic scan tool, a multimeter for testing wiring continuity and voltage, and basic hand tools for removing and replacing the sensor or wiring.