AutoCodes – Nissan – B2777 Nissan

B2777 Nissan Code - PTC Heater LIN 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: B2777 Nissan indicates PTC Heater LIN 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 2,349

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 B2777 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 PTC heater.

OBDII Code B2777 Nissan - PTC Heater LIN Communication - AutoCodes.com — B2777 Nissan Code - PTC Heater LIN Communication

What does this mean?

What are the Possible Causes of the DTC B2777 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 B2777 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 B2777 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 B2777 Nissan Code

1. What are the common symptoms of OBDII code B2777 in a Nissan related to PTC Heater LIN Communication?

- The common symptoms include a malfunctioning PTC heater, poor heat output from the heater, and issues with the vehicle's climate control system.

2. What are the possible causes of OBDII code B2777 in a Nissan related to PTC Heater LIN Communication?

- The code can be triggered by issues with the PTC heater, damaged wiring or connectors in the LIN communication circuit, or a faulty LIN communication module.

3. How can I diagnose OBDII code B2777 in a Nissan related to PTC Heater LIN Communication?

- Diagnosing the code involves checking the PTC heater for proper operation, inspecting the LIN communication circuit for any faults, and using a scan tool to read the codes and data related to the issue.

4. What are some repair tips for resolving OBDII code B2777 in a Nissan related to PTC Heater LIN Communication?

- Repair tips include checking and repairing any damaged wiring or connectors, replacing a faulty PTC heater, and reprogramming or replacing the LIN communication module if needed.

5. Can OBDII code B2777 in a Nissan related to PTC Heater LIN Communication be fixed without professional help?

- While some simple checks like inspecting connectors and wiring can be done by DIY enthusiasts, diagnosing and repairing the LIN communication issue may require professional help due to the complexity of the system.

6. Is it safe to continue driving with OBDII code B2777 in a Nissan related to PTC Heater LIN Communication?

- It is generally safe to drive the vehicle with this code, but it's recommended to address the issue promptly to prevent further damage to the heating system and ensure proper functionality.

7. How much can I expect to spend on repairing OBDII code B2777 in a Nissan related to PTC Heater LIN Communication?

- The repair costs can vary depending on the exact cause of the issue, but it's advisable to budget for diagnostic fees, replacement parts, and labor costs which can range from a few hundred to over a thousand dollars.