2017 Honda Civic A/C Refrigerant & Oil Capacity

Quick Answer

• Refrigerant Type: R-1234yf
• Full System Charge: 14.1-15.9 oz (400-450 grams)
• PAG Oil Type: PAG 46
• PAG Oil Amount: 4.7 fl oz (140 mL)
• Low-Side Service Port: On the prominent A/C line near the firewall, passenger side.
• High-Side Service Port: On the smaller A/C line near the condenser, driver side, often under a plastic cover.

The 2017 Honda Civic transitioned to the newer R-1234yf refrigerant, a global warming potential (GWP) compliant refrigerant required in new vehicles starting in 2017.

Why R-1234yf Matters

R-1234yf (2,3,3,3-tetrafluoroprop-1-ene) is a hydrofluoroolefin (HFO) refrigerant developed to replace R-134a due to its significantly lower Global Warming Potential (GWP). While R-134a has a GWP of 1,430, R-1234yf has a GWP of less than 1, meaning it has a negligible impact on global warming if released into the atmosphere. This transition was mandated by EPA regulations for new vehicles starting in 2017.

For vehicle owners, this means a few key differences:

• Cost: R-1234yf is typically more expensive than R-134a, both for the refrigerant itself and for the specialized equipment required to service it.
• EPA Regulations: Due to its flammability (albeit mild), and to prevent cross-contamination, dedicated recovery and charging equipment is required for R-1234yf systems. Mixing refrigerants can damage the A/C system and the specialized service equipment.
• Recovery Machine Requirements: Shops servicing R-1234yf must use EPA 609 certified recovery and recycling equipment specifically designed for R-1234yf, which helps prevent accidental release and ensures proper handling.

Recharge Procedure

Recharging your 2017 Honda Civic's A/C system requires precision and the correct equipment. Unlike older systems where a pressure gauge might suffice for a quick top-off, R-1234yf systems demand accurate charging by weight. Here's a high-level overview:

1. Evacuation: The system must be thoroughly evacuated using a vacuum pump to remove all air and moisture. This is critical as moisture can form corrosive acids within the system, leading to premature component failure.
2. Leak Test: After evacuation, the system should hold a vacuum, indicating no significant leaks. If it doesn't, a leak detection process (e.g., nitrogen pressure test with leak detection solution or electronic leak detector) is necessary before recharging.
3. Proper Charge by Weight: Using an R-1234yf-specific A/C recovery and recharge machine, the correct amount of refrigerant, measured by weight (ounces or grams), is charged into the system. Relying solely on pressure readings can lead to over or undercharging, both of which can reduce cooling performance and potentially damage the compressor.

Warning: Do not attempt to "top off" an R-1234yf system with R-134a or any other refrigerant. This can damage components and contaminate the system, leading to costly repairs.

Common A/C Problems for the 2017 Honda Civic

While the 2017 Honda Civic generally has a reliable A/C system, some common issues can arise:

• Compressor Failures: The A/C compressor is a critical component that can wear out over time. Symptoms include a loud grinding noise when the A/C is on, lack of cold air, or the compressor clutch not engaging. Proper refrigerant charge and lubrication are crucial for compressor longevity.
• Condenser Issues: The condenser, located in front of the radiator, is exposed to road debris. Punctures from rocks or corrosion can lead to refrigerant leaks. Reduced airflow through a clogged or dirty condenser can also diminish cooling performance.
• Evaporator Leaks: The evaporator, located inside the dashboard, can develop slow leaks that are difficult to diagnose without specialized equipment. Symptoms include a persistent musty odor and gradual loss of refrigerant.
• A/C Relay Failure: A faulty A/C compressor relay can prevent the compressor from engaging. This is often a relatively inexpensive and easy fix.

When to Call a Pro

Given the specialized nature of R-1234yf systems and the potential dangers of working with refrigerants, it is highly recommended to seek professional assistance for A/C repairs or recharges. A certified technician has the proper equipment to safely and effectively diagnose and repair your system, ensuring EPA compliance and optimal performance.

Safety Disclaimer: Automotive air conditioning systems contain refrigerants under high pressure. Exposure to refrigerants can cause frostbite and other injuries. Releasing refrigerants into the atmosphere is harmful to the environment and illegal. Always wear appropriate personal protective equipment (PPE) and ensure you are EPA 609 certified before attempting any A/C system service.

Find a certified A/C shop on Repairius.