AutoCodes – Chevrolet – B0237 Chevrolet

B0237 Chevrolet Code - Left Temperature Actuator

Quick Answer

Stepper motors are used for temperature regulation, air distribution control and recirculation door control. Common causes include Faulty Left Temperature Actuator, Left Temperature Actuator harness is open or shorted, Left Temperature Actuator circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B0237 Chevrolet indicates Left Temperature Actuator.
Common causes: Common causes include Faulty Left Temperature Actuator, Left Temperature Actuator harness is open or shorted, Left Temperature Actuator circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 1,608

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 10, 2021

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B0237 Chevrolet Description

Stepper motors are used for temperature regulation, air distribution control and recirculation door control. With the switches and dials on the HVAC controls, air temperature door position, mode door position and recirculation door position can be selected. The selected values are passed to the Heating, Ventilation, and Air Conditioning (HVAC) Control Module via serial data. The HVAC control module supplies a 12 V reference voltage to the stepper motors and energizes the 4 stepper motor coils with a pulsed ground signal. The stepper motors move the appropriate doors into the calculated positions, in order to reach the desired positions.

OBDII Code B0237 Chevrolet - Left Temperature Actuator - AutoCodes.com — B0237 Chevrolet Code - Left Temperature Actuator

What does this mean?

What are the Possible Causes of the DTC B0237 Chevrolet?

Faulty Left Temperature Actuator
Left Temperature Actuator harness is open or shorted
Left Temperature Actuator circuit poor electrical connection
Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module

How to Fix the DTC B0237 Chevrolet?

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 does this mean?

Code Tech Notes

A broken or damaged air temperature door and or actuator can cause this Diagnostic Trouble Code (DTC) to set by allowing the actuator shaft to rotate completely to its internal stop (overtravel condition). Internal stops are outside the working range of feedback potentiometers 0-250 count. If the condition exists, wiggle wires and connectors and check for poor connections.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0237 Chevrolet 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 B0237 Chevrolet Code

1. What does OBDII code B0237 mean on a Chevrolet?

Code B0237 indicates a problem with the left temperature actuator, which controls the blend of hot and cold air on the driverâ€™s side.

2. What are the symptoms of a B0237 code in a Chevrolet?

Symptoms may include uneven cabin temperatures, the inability to control the driver-side temperature, or a clicking noise from the dashboard.

3. What causes a B0237 code in a Chevrolet?

Common causes include a faulty left temperature actuator, wiring issues, or a malfunction in the climate control module.

4. How can I fix a B0237 code on my Chevrolet?

Start by inspecting the left temperature actuator for damage or failure and replace it if necessary. Check all related wiring and connectors for damage or loose connections.

5. Can I drive my Chevrolet with a B0237 code?

Yes, but the climate control system may not function properly, which could lead to uncomfortable cabin temperatures.

6. How do I reset a B0237 code on my Chevrolet?

After repairing the issue, you can clear the code using an OBDII scanner or by disconnecting the battery for a few minutes, though the problem may return if the underlying issue isnâ€™t fixed.

7. Where is the left temperature actuator located on a Chevrolet?

The left temperature actuator is typically located behind the dashboard, near the HVAC system on the driverâ€™s side.

8. How much does it cost to repair a B0237 code?

Replacing the left temperature actuator typically costs between $150 and $300, including parts and labor, but prices may vary depending on the model.

9. Can a B0237 code be caused by a software issue?

Yes, though rare, a faulty climate control module or outdated software can sometimes trigger this code.

10. How can I test the left temperature actuator in my Chevrolet?

You can test the actuator by manually adjusting the temperature controls and observing its movement or using a multimeter to check for proper voltage and continuity.