2021 Honda Civic Engine Is Stalling

Troubleshooting Causes of Engine Stalling in Your 2021 Honda Civic and How to Resolve Them

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Fuel System
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15% chance it's the
Air Intake System
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55% chance it's
Something else
The most common reasons a 2021 Honda Civic engine is stalling are the fuel system, the air intake system, or the ignition system.
  • Fuel System: A clogged fuel filter or failing fuel pump can restrict fuel flow, resulting in poor engine performance and starting issues.
  • Air Intake System: A dirty or damaged air filter or a malfunctioning mass airflow sensor can restrict airflow, leading to reduced engine performance and efficiency.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2021 Honda Civic engine is stalling?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

If the MAF sensor sends an erroneous signal, a few things happen. The engine's computer will trigger the check engine light, and the on-board diagnostic (OBD) trouble codes will reflect the airflow discrepancy noted by the MAF sensor. Depending on the reported volume of air, the engine may try to compensate for these conditions, causing the engine to burn excessive amounts of fuel and emit black smoke from the exhaust. In this case, the OBD trouble codes would also reference faults recognized by the exhaust oxygen sensors. The engine may also have issues with idling roughly, failing to start, stalling, hesitation, power loss, misfires, and fuel consumption.

»MORE: Signs of a failing mass airflow sensor

A faulty oxygen sensor is one of the most common causes of a check engine light. Symptoms may include a decrease in fuel mileage, hesitation or misfiring from the engine, rough idling or even stalling. A faulty sensor may cause the vehicle to fail an emissions test.

Any time there is an emissions fault the check engine light will be displayed. The purpose of the check engine light is to inform the driver that an emission related fault has been found, and that there are on-board diagnostic (OBD) trouble codes stored in the powertrain or engine control module. Additionally, since the emissions systems are so intertwined into engine control and transmission control systems, symptoms may include nearly any sort of drivability concerns. This may include harsh shifting, failure to shift, hesitation on acceleration, jerking, engine failure to start or run, loss of power, or any number of other drivability issues.

When the Check Engine Light comes on, you may experience engine performance issues such as poor acceleration, rough idling, or an engine that won't start. In some cases, no abnormal symptoms will be experienced. Other systems like the transmission or ABS can cause the Check Engine Light to illuminate and lights for those systems can come on at the same time. Similar lights may say "Check Engine Soon", "Malfunction Indicator Light" or just "Check". In rare case the engine can overheat.

What are the initial diagnostic steps to take for a 2021 Honda Civic experiencing engine stalling?

When faced with engine stalling in a 2021 Honda Civic, it's essential to adopt a methodical diagnostic approach to identify the root cause effectively. Start by checking for error codes using an OBD-II scanner, as these codes can reveal specific issues within the vehicle's systems. Next, inspect the fuel system, including the fuel pump, filter, and injectors, to ensure that fuel is being delivered properly to the engine. Following this, examine the ignition system components such as spark plugs and ignition coils to confirm they are functioning correctly and providing the necessary spark. Additionally, evaluate the air intake system for any obstructions or leaks that could disrupt the air-fuel mixture. It's also crucial to check the battery and charging system to ensure they are supplying adequate power to the engine. Lastly, inspect for any vacuum leaks in the lines and hoses, as these can significantly affect engine performance. By systematically addressing these areas, you can effectively diagnose and resolve the stalling issue in your Honda Civic.

What are the common problems that could cause the engine to stall in a 2021 Honda Civic?

When diagnosing engine stalling in a 2021 Honda Civic, it's essential to consider several key systems that may be at fault. Start with the fuel system, as a malfunctioning fuel pump or a clogged fuel filter can disrupt fuel delivery, leading to stalling. Next, examine the ignition system; worn spark plugs or faulty ignition coils can prevent the engine from firing properly. The air intake system also plays a critical role; a dirty air filter or a malfunctioning mass airflow sensor can restrict airflow, affecting engine performance. Additionally, the engine control module (ECM) and sensors, such as the crankshaft and camshaft position sensors, are vital for engine timing and operation, and any issues here can result in stalling. Lastly, don’t overlook the electrical system; a weak battery or a failing alternator can cause power interruptions that lead to engine shutdowns. By systematically checking these components, DIYers can effectively identify and address the root causes of engine stalling, ensuring their Honda Civic remains reliable on the road. Regular maintenance and prompt repairs are crucial in preventing these issues from escalating.

How urgent is it to address the engine stalling issue in a 2021 Honda Civic?

When it comes to the engine stalling issue in a 2021 Honda Civic, urgency cannot be overstated. Stalling can occur unexpectedly, especially while driving, which poses a significant safety risk as it may lead to loss of control over the vehicle. This unpredictability makes it crucial for drivers to address the problem immediately. Furthermore, neglecting this issue can lead to more severe damage to the engine or other vital components, resulting in costly repairs down the line. For DIY enthusiasts, understanding the importance of timely intervention is essential not only for the safety of the driver and passengers but also for maintaining the vehicle's overall performance and longevity. Regular maintenance and prompt repairs are key to ensuring that your Honda Civic remains reliable and safe on the road, making it imperative to take action as soon as engine stalling symptoms arise.

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2021 Honda Civic Engine Stalling Causes & Solutions