AutoCodes – Generic – B10B2

B10B2 Code - A/C Cool Down Test Performance

Quick Answer

The A/C Heater Controller has software to enable it to perform an A/C Cool Down Test by a command using a scan tool. Common causes include Faulty A/C Heater Controller, A/C Heater Controller harness is open or shorted, A/C Heater Controller 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: B10B2 indicates A/C Cool Down Test Performance.
Common causes: Common causes include Faulty A/C Heater Controller, A/C Heater Controller harness is open or shorted, A/C Heater Controller 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 2,899

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 Nov 19, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B10B2 Description

The A/C Heater Controller has software to enable it to perform an A/C Cool Down Test by a command using a scan tool. This test checks for evaporator temperature drop over a predetermined time. If the test fails, this DTC will set. However, certain test conditions are required to perform this test. Failure to run this test within those parameters can result in failure of the test.

OBDII Code B10B2 - A/C Cool Down Test Performance - AutoCodes.com — B10B2 Code - A/C Cool Down Test Performance

What does this mean?

What are the Possible Causes of the DTC B10B2?

Faulty A/C Heater Controller
A/C Heater Controller harness is open or shorted
A/C Heater Controller circuit poor electrical connection

How to Fix the DTC B10B2?

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 B10B2 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 B10B2 code?

Need more information on how to fix the B10B2 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B10B2 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B10B2 Chrysler — A/C Cool Down Test Performance
B10B2 Dodge — A/C Cool Down Test Performance
B10B2 Jeep — A/C Cool Down Test Performance
B10B2 RAM — A/C Cool Down Test Performance

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 B10B2 Code

1. What does the OBDII code B10B2 mean?

The B10B2 code indicates an issue with the A/C Cool Down Test Performance, meaning the air conditioning system is not cooling the cabin as expected during a diagnostic test.

2. What are common symptoms of the B10B2 code?

Symptoms can include reduced or no cooling from the A/C system, inconsistent cabin temperature, or the A/C system failing a diagnostic test.

3. What causes the B10B2 code to appear?

Common causes include low refrigerant levels, a malfunctioning A/C compressor, a faulty A/C pressure sensor, or issues with the condenser or cooling fans.

4. Can a dirty cabin air filter trigger the B10B2 code?

Yes, a clogged or dirty cabin air filter can restrict airflow and contribute to poor A/C performance, potentially causing the code to appear.

5. How can low refrigerant levels cause the B10B2 code?

Low refrigerant levels prevent the A/C system from achieving optimal cooling, leading to poor performance during the cool down test.

6. Can faulty electronics trigger the B10B2 code?

Yes, issues with the A/C control module, temperature sensors, or wiring can cause the system to fail the cool down test and set the code.

7. What should you check first when diagnosing the B10B2 code?

Start by checking refrigerant levels, inspecting the A/C compressor operation, and ensuring the cooling fans and condenser are functioning properly.

8. Is it safe to drive with the B10B2 code active?

Yes, it is generally safe to drive, but the A/C system may not work properly, impacting cabin comfort, especially in hot weather.

9. How is the B10B2 code typically fixed?

Repairs can include recharging the refrigerant, replacing a faulty A/C compressor, clearing debris from the condenser, or addressing electrical issues.

10. Can resetting the code fix the B10B2 issue?

Resetting the code may clear it temporarily, but the underlying issue must be diagnosed and repaired to prevent the code from returning.