AutoCodes – Nissan – B2779 Nissan

B2779 Nissan Code - PTC Heater Communication

Quick Answer

A Positive Temperature Coefficient (PTC) heater is used as the heat source for heating. Common causes include Faulty Positive Temperature Coefficient (PTC) Heater, PTC Heater harness is open or shorted, PTC Heater 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: B2779 Nissan indicates PTC Heater Communication.
Common causes: Common causes include Faulty Positive Temperature Coefficient (PTC) Heater, PTC Heater harness is open or shorted, PTC Heater 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 1,074

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 Feb 04, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2779 Nissan Description

A Positive Temperature Coefficient (PTC) heater is used as the heat source for heating. The PTC is a ceramic material with barium titanate as the primary component. The PTC heater provides an internal control circuit and performs Local Interconnect Network (LIN) communication with A/C Auto Amplifier. Based on the signals from A/C Auto Amplifier, the microcomputer inside PTC heater controls the heater output by PWM. When current is applied, it heats up. Upon reaching a certain temperature (Curie temperature) the resistance suddenly increases, limiting the current, and maintaining a constant amount of heating. The Diagnostic Trouble Code (DTC) sets when there is an error in the signal sent from the A/C Auto Amplifier or there is an error in the signal received by the PTC heater.

OBDII Code B2779 Nissan - PTC Heater Communication - AutoCodes.com — B2779 Nissan Code - PTC Heater Communication

What does this mean?

What are the Possible Causes of the DTC B2779 Nissan?

Faulty Positive Temperature Coefficient (PTC) Heater
PTC Heater harness is open or shorted
PTC Heater circuit poor electrical connection
Faulty A/C Auto Amplifier

How to Fix the DTC B2779 Nissan?

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 B2779 Nissan 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 B2779 Nissan Code

1. What are common symptoms of OBDII code B2779 Nissan related to PTC Heater Communication?

Common symptoms include a malfunctioning heater, reduced heating performance, and potentially issues with the climate control system.

2. What are some possible causes of OBDII code B2779 Nissan?

Possible causes include a faulty PTC heater, damaged wiring or connectors, a malfunctioning control module, or issues with the communication network.

3. How can I diagnose the root cause of OBDII code B2779 Nissan?

Diagnosis involves checking the PTC heater for proper operation, inspecting wiring and connectors for damage, scanning the control module for fault codes, and testing the communication network.

4. Can I still drive my Nissan with OBDII code B2779?

It is not recommended to drive your Nissan with this code as it can affect the heating system and potentially lead to other issues. It is best to address the problem promptly.

5. How can I repair OBDII code B2779 Nissan related to PTC Heater Communication?

Repair steps may include replacing the PTC heater, repairing or replacing damaged wiring and connectors, resetting the control module, or addressing any issues with the communication network.

6. Will resetting the OBDII code B2779 Nissan fix the problem?

Resetting the code may temporarily clear the fault, but if the underlying issue is not addressed, the code is likely to return. It is important to diagnose and repair the root cause.

7. How much does it cost to fix OBDII code B2779 Nissan?

The cost of fixing this code can vary depending on the specific cause of the issue, parts needed for repair, and labor rates. It is advisable to consult a professional mechanic for an accurate estimate.

8. Is OBDII code B2779 Nissan a common issue in Nissan vehicles?

While not as common as some other OBDII codes, issues related to PTC Heater Communication can occur in Nissan vehicles, particularly in models equipped with this type of heating system.

9. Can I prevent OBDII code B2779 Nissan from occurring in the future?

Regular maintenance, timely repairs of heating system components, and addressing any warning signs can help prevent the recurrence of this code in the future.

10. Should I attempt to fix OBDII code B2779 Nissan myself?

Due to the complexity of the systems involved and the potential safety risks, it is recommended to have this code diagnosed and repaired by a qualified automotive technician to ensure proper resolution.