(Solved) Check Emission System Honda Civic

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emissions system problem honda

These days, Honda cars and millions of other modern automobiles feature complex emissions systems meant to eliminate toxic exhaust gases and minimize the number of pollutants emitted into our environment. Car’s emissions system also contributes to improved engine efficiency and fuel economy. 

Automobiles nowadays are built with a sophisticated Evaporative emissions control system (EVAP) that employs various oxygen (O2) sensors, computer systems, and intelligent exhaust system technology to alert the driver via Check Engine light when a potential issue exists. However, this technology can occasionally fail, so it’s essential to be aware of possible vehicle emissions issues once they arise.

Your dashboard warning light that says “check emission system” didn’t illuminate for no cause. Troubleshooting your Check Emission System Honda Civic 2013 or other Honda vehicle models is just as crucial as addressing any other dashboard-mounted indicator. Usually, warning lights indicate an issue accompanied by a fault code that you’re unaware of or have not managed, and you must not overlook them to prevent more problems.

In this article, we’ll discuss the factors that affect and trigger the Check Emission System, such as the Check Emission System Honda Civic 2013 and other Honda car models like Honda Civic 2014, 2015 as well as the Honda Pilot. If you suspect that your Honda Civic might suffer an emissions system problem, this post is for you. Apart from getting your Honda tested quickly by Honda auto repair mechanics, you must also know the factors contributing to your car’s emission system problem. Read on to learn more!

What Does Check Emission System Light On Honda Civic Mean?

It signifies that your vehicle’s emissions control system is failing and emitting more air pollutants than is authorized by federal law. This flashing light tells a critical issue that might result in substantial engine damage if not treated immediately. Moreover, this flashing light often signals a significant engine misfire that permits unburned fuel to seep into your exhaust system.

Note: Your Check Engine Light might illuminate for various reasons contrasted to other warning lights, such as your coolant temperature indicator, which signifies overheating. Therefore, you must take your vehicle to a shop and have the mechanics analyze the issue.

Among the potential causes of emission system problems of your Honda Civic are the following:

  • Faulty ignition system
  • Missing, defective, or loose gas cap
  • Issues with controlling emission
  • Issues with controlling emission
  • Bad battery

In this circumstance, a car would flunk any emissions test. Sadly, its Check Emission system is among the most typically misinterpreted lights or indications on your Honda Civic. The check engine light is a component of the onboard diagnostics (OBD) system, and it might display in different ways.

Check Engine Light 2012 Honda Civic

Once your car’s monitoring unit identifies a problem with your engine’s critical components, its Check Engine Light turns on and blinks, and the electronic control module (ECM) instantly detects the issue in the form of trouble codes to determine the exact cause of the warning light.

Nonetheless, several different factors might be triggering the Check Engine Light on your Honda Civic 2012. There are several explanations for why your Check Engine Light is illuminating, such as:

  • Transmission difficulties
  • Emissions control issues
  • Loose, defective, or missing fuel cap
  • Weak or dead battery
  • Fuel and air metering systems complications
  • Problematic exhaust gas recirculation system
  • Bad mass airflow sensor
  • Bad spark plugs or spark plug wires
  • Ignition system failures
  • Dirty air filter
  • Oxygen (O2) sensor difficulties
  • Clogged catalytic converter
  • Faulty fuel pump

It might be as little as a missing or loose fuel cap or as severe as an engine knock. The Check Engine Light, a component of your automobile’s diagnostic system, flashes in red or amber.

Each 2012 Honda Civic comes included with a high-end automated performance monitoring technology. Therefore, if this warning light on your Civic is blinking, there’s an issue you must handle or schedule a Check Engine Light service.

Check Emission System Honda Civic 2013

When the Check Emission System light illuminates on your 2013 Honda Civic’s dash, it means your emissions control system is malfunctioning. It could be a simple problem (such as a loose fuel cap) in certain instances, and in others, it could be considerably complicated, such as the Check Engine Light causes on the 2012 Honda Civic stated above.

But anyway, your wisest option for promptly resolving the problem is to conduct a fast diagnostic as early as possible, whether you DIY it or by a professional.

Since the diverse systems monitor hundreds of your car sensors, it’s almost impossible to assume or guess where the problem is. However, minor issues such as a missing gasoline cap or refueling while the engine is running might trigger the indicator to illuminate.

Check Emission System Honda Civic 2014

The Check Emission System is a vital component of your automobile’s onboard diagnostics system that you must not ignore. Significantly, it often manifests in several forms. For instance, it may state “Check Emission System” or depict an engine icon, or both at the same time.

This red or amber indicator light is an element of your car’s diagnostic system. From the 1980s until now, onboard systems have progressively regulated and monitored automobile performance, and they might very well help your 2014 Honda Civic.

Check Emission System Honda Civic 2015

Your Check Engine Light will illuminate if your Civic suffers an emission problem. The engine lighting test is designed to warn you that an emission-related issue is detected and that diagnostic trouble codes recorded the check engine light codes in your engine control system or powertrain.

Due to the intimate relationship between pollution control systems and transmission and engine control systems, the indications might comprise almost any form of drivability problem, such as:

  • Abnormal shifting
  • Difficulty to shift
  • Hesitancy while accelerating
  • Tugging
  • Engine failing to start
  • Power loss

And several other operational-related problems are examples.

How To Fix Honda Civic Emissions System Problem

Various emission problems might develop anytime, anywhere. To be able to address these emission issues, it’s necessary to identify which trouble has emerged. Below is a summary of Honda emissions system issues and their respective solutions.

Bad Positive Crankcase Ventilation (PCV) System Lines

Your Positive Crankcase Ventilation (PCV) system, or the PVC valve, is among the most prevalent emissions system issues among Honda Civics. PCV is involved in eliminating blow-by gases from your crankcase to your intake manifold.

It has tubes that are susceptible to deterioration. They could get damaged or blocked, causing the Check Engine Light to illuminate. To determine if your PVC valve connections are defective, examine your PVC valve and repair or replace it if any defects are present.

Dirty Or Clogged Air Filter

Your car’s air filter prevents dust, debris, and particles from entering your engine. If your air filter gets dirty or clogged, the Check Emission System light on your Honda Civic may illuminate. Two possible solutions for Honda Civic’s 2012 to 2015 models’ emissions system issues. You might either choose to clean your filter or replace them to resolve the problem.

Evaporative Emissions Control (EVAP) System Damaged Components

The EVAP system controls the discharge of hazardous gas from your fuel system into the environment. Its tubes, fittings, and cylinder are susceptible to deterioration that might impact your emission control system. If broken, you must replace them asap.

Damaged, Missing, Or Loose Gas Cap

A faulty, missing, or loose fuel cap could enable gas vapors to escape while your vehicle is parked, and it also permits petrol to evaporate. Removing and reinstalling a loose fuel cap can remedy the problem. If your gas cap is defective, replacing it as quickly as possible might resolve the issue.

Broken Exhaust Gas Recirculation (EGR) System Components

Once your combustion temperature becomes high, the EGR system is responsible for permitting fumes to reenter the intake system. EGR hoses could get damaged, EGR pipelines can become blocked, and EGR valves can become defective. Check your EGR for such defects and replace any faulty components.

Damaged Air Cleaner Intake Hose

As this hose wears and rips, it instantly causes an emission issue. This hose links your air filter into your engine’s throttle body and supplies the combustion engine with air. Dirt and particles could enter the hose if it’s compromised, affecting your engine. Get a fresh air cleaner inlet hose and replace it to fix the issue.

Emissions System Problem On Other Models

Emission System Problem could occur in any car at any moment. However, this issue is said to be rampant in Honda Civics, but do you know that this common issue is also shared with other Honda models? Below are a few Honda models prone to the “Check Emission System” issue.

Honda Pilot

A dashboard sign that reads Check Emissions System is a frequent issue on Honda Pilot vehicles, which you can often resolve by replacing the fuel injectors. Typically, the alert notice appears between 40,000 miles to 60,000 miles and occasionally much sooner. Although Honda has not yet issued a recall for the problem, Honda dealerships are mindful of the problem.


When the onboard system identifies a problem with the engine’s operation, gearbox, or emissions system, the Check Engine light or Check Emissions System light glows.

Once this occurs, the computer system stores a fault code. This erroneous code is essential to fixing your car after a diagnostic. The Check Emission System indicator could activate due to any of the following:

  • Vacuum leak
  • Misfires
  • Low engine compression
  • Incorrectly functioning sensors
  • Hydraulic pressure reduction
  • Bad transmission shift solenoid
  • Short circuits
  • EVAP leak

There are several potential causes for the Check Engine Light to appear. Take your car to an expert mechanic for a complete diagnosis.

Honda Odyssey

When the Check Emission System light illuminates on the Honda Odyssey dashboard, an issue requires immediate attention, and your Honda must be immediately examined and serviced. The flashing Check Engine light signifies an urgent matter.

The flashing Check Engine light often signifies a significant engine misfire that allowed unburned gasoline to escape into your exhaust system. This could quickly raise the temperature of your catalytic converter to a point where failure is inevitable, causing an expensive repair.

Extended Honda Emission System Warranty

Honda Motors had already issued a Technical Service Bulletin (TSB) in November 20202, informing its dealerships about the issue, providing advice about how to diagnose and repair the problem, and prolonging the warranty up to 150,000 miles or ten years, whichever occurs first.


If you see the frightening Check Emissions System notification, you should immediately examine the possible causes stated above or get your vehicle evaluated by an expert as soon as possible. Postponing would only worsen the case and result in more catalytic converter failure. 


Is it safe to drive with a check emission system?

Yes, as long as it’s for an emergency or short drive and it’s the only warning light on and not accompanied by a Check Engine Light. You don’t need to be afraid for your safety.

Why does my dashboard say Check Emission System?

It means your oxygen sensor detects whether your engine is burning excessive or insufficient fuel. It might also activate the Check Engine light to warn you that your engine is running too lean or too rich or has a problem with its sensor.

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