AutoCodes – Generic – C0236

C0236 Code - Missing Rear Speed Sensor Signal

Quick Answer

As the wheel spins, the wheel speed sensor produces an Alternating Current (AC) signal. Common causes include Faulty Rear Speed Sensor, Rear Speed Sensor harness is open or shorted, Rear Speed 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: C0236 indicates Missing Rear Speed Sensor Signal.
Common causes: Common causes include Faulty Rear Speed Sensor, Rear Speed Sensor harness is open or shorted, Rear Speed 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 14,459

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 May 10, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0236 Description

As the wheel spins, the wheel speed sensor produces an Alternating Current (AC) signal. The Electronic Brake Control Module (EBCM) uses the frequency of the AC signal to calculate the wheel speed.

OBDII Code C0236 - Missing Rear Speed Sensor Signal - AutoCodes.com — C0236 Code - Missing Rear Speed Sensor Signal

What does this mean?

What are the Possible Causes of the DTC C0236?

Faulty Rear Speed Sensor
Rear Speed Sensor harness is open or shorted
Rear Speed Sensor circuit poor electrical connection
Faulty EBCM

How to Fix the DTC C0236?

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 C0236 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 C0236 code?

Need more information on how to fix the C0236 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0236 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C0236 Buick — Missing Rear Speed Sensor Signal
C0236 Cadillac — Missing Rear Speed Sensor Signal
C0236 Chevrolet — Missing Rear Speed Sensor Signal
C0236 GMC — Missing Rear Speed Sensor Signal
C0236 Lexus — Left Front Solenoid Valve
C0236 Scion — Left Front Solenoid Valve
C0236 Toyota — Left Front Solenoid Valve

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 C0236 Code

1. What are the common symptoms of OBDII code C0236 (Missing Rear Speed Sensor Signal)?

- The common symptoms include ABS warning light illuminated on the dashboard, issues with the vehicle's stability control system, and potential problems with the anti-lock braking system.

2. What are the possible causes of OBDII code C0236?

- The code C0236 is typically triggered by a faulty rear wheel speed sensor, damaged wiring or connectors in the speed sensor circuit, or issues with the vehicle's electronic control module (ECM).

3. How can I diagnose the cause of the Missing Rear Speed Sensor Signal code?

- Diagnosing the code C0236 involves checking the rear wheel speed sensor for any physical damage, testing the sensor's electrical connections, and using a scan tool to gather data from the sensor.

4. Is it safe to drive with the OBDII code C0236 active?

- It is not recommended to drive with the C0236 code active, as it may affect the proper functioning of the vehicle's anti-lock braking system and stability control, potentially compromising safety.

5. Can I repair the Missing Rear Speed Sensor Signal issue myself?

- Depending on your experience and access to tools, you may be able to replace a faulty rear wheel speed sensor yourself. However, diagnosing and repairing wiring or ECM issues may require professional expertise.

6. Are there any quick tips for fixing the C0236 code?

- Quick tips include checking the sensor's wiring for damage, ensuring proper sensor alignment, cleaning sensor connections, and resetting the code to see if it reoccurs.

7. How much does it typically cost to repair the Missing Rear Speed Sensor Signal issue?

- The cost of repairing the C0236 code can vary based on the cause of the issue, but it may range from $100 to $300 for parts and labor if a sensor replacement is needed.

8. What should I do if the C0236 code keeps coming back after repairs?

- If the code persists after repairs, it is recommended to recheck the sensor and wiring connections, perform a more thorough diagnostic, or seek assistance from a professional mechanic.

9. Will the C0236 code cause any damage to other vehicle components if left unrepaired?

- Leaving the C0236 code unresolved may lead to further issues with the vehicle's ABS and stability control systems, potentially affecting overall driving safety and performance.

10. Can extreme weather conditions affect the rear speed sensor and trigger the C0236 code?

- Yes, extreme weather conditions like heavy snow, ice, or water can impact the rear speed sensor's performance and trigger the C0236 code. Regular maintenance and inspection can help prevent such issues.