AutoCodes – Generic – B2428

B2428 Code - A/C Post Heater Sensor #2 Circuit Failure

Quick Answer

The Body Control Module (BCM) monitors the A/C Post Heater Sensor #2. Common causes include Faulty A/C Post Heater Sensor #2, A/C Post Heater Sensor #2 harness is open or shorted, A/C Post Heater Sensor #2 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: B2428 indicates A/C Post Heater Sensor #2 Circuit Failure.
Common causes: Common causes include Faulty A/C Post Heater Sensor #2, A/C Post Heater Sensor #2 harness is open or shorted, A/C Post Heater Sensor #2 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 5,542

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 Dec 08, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2428 Description

The Body Control Module (BCM) monitors the A/C Post Heater Sensor #2. The BCM sets the OBDII code when the A/C Post Heater Sensor #2 is not to factory specifications.

OBDII Code B2428 - A/C Post Heater Sensor #2 Circuit Failure - AutoCodes.com — B2428 Code - A/C Post Heater Sensor #2 Circuit Failure

What does this mean?

What are the Possible Causes of the DTC B2428?

Faulty A/C Post Heater Sensor #2
A/C Post Heater Sensor #2 harness is open or shorted
A/C Post Heater Sensor #2 circuit poor electrical connection

How to Fix the DTC B2428?

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 B2428 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 B2428 code?

Need more information on how to fix the B2428 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2428 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2428 Infiniti — Automatic Back Door Control Unit
B2428 Nissan — Automatic Back Door Control Unit

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 B2428 Code

What does the OBDII code B2428 mean?

The OBDII code B2428 indicates a failure in the A/C post heater sensor #2 circuit, which is responsible for monitoring the operation of the A/C system's post heater.

What are the common symptoms associated with code B2428?

Common symptoms include poor A/C performance, unusual noises from the A/C system, and the illumination of the check engine light.

What could cause the B2428 code to trigger?

Causes can include a faulty A/C post heater sensor, damaged wiring or connectors in the sensor circuit, or issues within the A/C control module itself.

How can I diagnose the B2428 code?

To diagnose the code, start by inspecting the A/C post heater sensor and its wiring for damage or corrosion. Use a multimeter to check for proper voltage and resistance in the circuit.

What are some common repair solutions for code B2428?

Common repairs include replacing the faulty A/C post heater sensor, repairing damaged wiring or connectors, and resetting the A/C control module if needed.

Can I drive my vehicle with the B2428 code?

While it may be possible to drive the vehicle, it is not recommended as it can lead to further A/C system issues and may affect overall vehicle performance.

How can I reset the B2428 code after repairs?

You can reset the B2428 code by using an OBDII scanner to clear the trouble codes or by disconnecting the vehicle's battery for a few minutes.

Is code B2428 serious?

While it may not pose an immediate safety risk, it can lead to ineffective A/C performance and should be addressed to ensure comfort and proper vehicle operation.

What should I do if the B2428 code returns after repairs?

If the code returns, recheck the sensor and wiring for any overlooked issues, and consider consulting a professional mechanic for further diagnostics.