AutoCodes – Toyota – B2237 Toyota

B2237 Toyota Code - Rear Left Sensor Malfunction

Quick Answer

The No. Common causes include Faulty Rear Left Sensor, Rear Left Sensor harness is open or shorted, Rear Left 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: B2237 Toyota indicates Rear Left Sensor Malfunction.
Common causes: Common causes include Faulty Rear Left Sensor, Rear Left Sensor harness is open or shorted, Rear Left 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 1,388

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 B2237 Toyota Description

The No. 3 Ultrasonic Sensor (Rear Left Sensor) is installed on the front bumper. The Clearance Warning ECU detects obstacles based on signals received from the Rear Left Sensor. If the Rear Left 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 Left Sensor).

OBDII Code B2237 Toyota - Rear Left Sensor Malfunction - AutoCodes.com — B2237 Toyota Code - Rear Left Sensor Malfunction

What does this mean?

What are the Possible Causes of the DTC B2237 Toyota?

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

How to Fix the DTC B2237 Toyota?

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 B2237 Toyota 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 B2237 Toyota code?

Need more information on how to fix the B2237 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2237 Toyota code diagnosed by a professional: Find a repair shop in your area

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 B2237 Toyota Code

1. What are the common symptoms of OBDII code B2237 Toyota Rear Left Sensor Malfunction?

The common symptoms include the malfunction indicator light (MIL) illuminating on the dashboard, issues with the vehicle stability control system, and potential difficulty in braking.

2. What are the possible causes of OBDII code B2237 Toyota Rear Left Sensor Malfunction?

The code B2237 can be triggered by a faulty rear left sensor, damaged wiring or connectors related to the sensor, or problems within the vehicle's stability control system.

3. How can I diagnose the OBDII code B2237 Toyota Rear Left Sensor Malfunction?

Diagnosis involves using an OBDII scanner to retrieve the specific fault code, inspecting the rear left sensor and its wiring for any visible damage, and conducting a thorough inspection of the vehicle stability control system.

4. Can I continue driving my vehicle with the OBDII code B2237 Toyota Rear Left Sensor Malfunction?

It is not recommended to drive the vehicle with this code present, as it can affect the proper functioning of the stability control system and compromise the safety of the vehicle.

5. How can I repair the OBDII code B2237 Toyota Rear Left Sensor Malfunction?

Repair options may include replacing the rear left sensor, repairing or replacing damaged wiring or connectors, and resetting the fault code using an OBDII scanner.

6. Are there any common DIY tips for addressing the OBDII code B2237 Toyota Rear Left Sensor Malfunction?

While some basic inspection and wiring checks can be done by DIY enthusiasts, it is advisable to seek professional help for accurate diagnosis and repair of this code.

7. How much does it typically cost to repair the OBDII code B2237 Toyota Rear Left Sensor Malfunction?

Repair costs can vary depending on the exact cause of the issue, but generally, it may range from a few hundred to a couple of thousand dollars, including parts and labor.

8. Can extreme weather conditions affect the triggering of OBDII code B2237 Toyota Rear Left Sensor Malfunction?

Yes, extreme weather conditions such as heavy rain, snow, or extreme temperatures can sometimes lead to sensor malfunctions triggering this fault code.

9. Will resetting the OBDII code B2237 Toyota Rear Left Sensor Malfunction make it go away permanently?

Resetting the code may temporarily turn off the MIL, but if the underlying issue is not addressed, the code is likely to reappear once the problem persists.

10. Is it important to address the OBDII code B2237 Toyota Rear Left Sensor Malfunction promptly?

Yes, it is crucial to address this code promptly to ensure the proper functioning of the vehicle's stability control system and maintain overall driving safety.