Honda P145C Code (Mean, Causes, & Repair) of 2024

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When your Honda vehicle’s check engine light illuminates, it’s essential to diagnose the issue promptly.

One common trouble code that Honda owners might encounter is the Honda P145C code.

In this article, we’ll delve into what this code means, its potential causes, symptoms, diagnostic procedures, repair options, and prevention tips.

Honda P145C

Introduction to Honda P145C code

The P145C code is specific to Honda vehicles and relates to the evaporative emission (EVAP) system.

This system is responsible for capturing and storing fuel vapors to prevent them from escaping into the atmosphere.

When the onboard diagnostics system detects a problem with the EVAP system, it triggers the P145C trouble code.

Understanding the meaning of a P145C code

The P145C code indicates a malfunction in the EVAP canister vent shut valve or related components.

This valve controls the flow of vapors from the EVAP canister to the engine intake manifold.

A malfunctioning valve can lead to issues with the EVAP system’s operation, potentially causing emissions to exceed allowable limits.

Causes of the P145C code

Several factors can contribute to the triggering of the P145C code, including:

– Faulty EVAP canister vent shut valve

The EVAP canister vent shut valve may fail due to wear and tear or electrical issues, preventing it from operating correctly.

– EVAP canister purge volume control solenoid valve malfunction

If the purge volume control solenoid valve fails, it can disrupt the flow of vapors within the EVAP system, leading to the P145C code.

– Faulty EVAP canister vent control valve

Similar to the vent shut valve, the vent control valve can experience malfunctions that trigger the P145C code.

Symptoms of a P145C code

When the P145C code is present, Honda owners may experience symptoms such as:

  • Illumination of the check engine light
  • Increased fuel consumption
  • Rough idling or stalling
  • Strong fuel odor near the vehicle

Diagnosis of the P145C code

Diagnosing the P145C code involves several steps, including:

– Using an OBD-II scanner

An OBD-II scanner can retrieve the trouble code stored in the vehicle’s onboard computer, providing valuable information for diagnosis.

– Visual inspection

Inspecting the EVAP system for signs of damage, leaks, or loose connections can help pinpoint the issue.

– Checking EVAP system components

Testing the EVAP canister vent shut valve, purge volume control solenoid valve, and vent control valve for proper operation is essential for diagnosis.

Repair options for the P145C code

Once the cause of the P145C code is identified, repair options may include:

– Replacing faulty components

If a component such as the EVAP canister vent shut valve is defective, it may need to be replaced to resolve the issue.

– Clearing the trouble code

After making repairs, clearing the trouble code from the vehicle’s computer with an OBD-II scanner can reset the check engine light.

Prevention tips for avoiding the P145C code

To prevent the recurrence of the P145C code, Honda owners can:

  • Perform regular maintenance on the EVAP system
  • Address any fuel system issues promptly
  • Use quality fuel and ensure the fuel cap is tightly sealed

People also ask

What is code P145C mean?

The P145C code indicates a malfunction in the evaporative emission (EVAP) system,

specifically related to the vent shut valve or associated components in Honda vehicles.

What does evaporative emission system low purge flow mean?

The term “evaporative emission system low purge flow” typically indicates that there is insufficient flow of fuel vapor from the charcoal canister to the engine intake manifold in a vehicle’s EVAP system.

This issue can lead to increased emissions and may trigger a check engine light.

What does vapor canister solenoid do?

The vapor canister solenoid, also known as the purge solenoid or purge valve,

controls the flow of fuel vapors from the charcoal canister to the engine intake manifold in a vehicle’s evaporative emission (EVAP) system.

It opens and closes in response to commands from the engine control module (ECM) to regulate the purging of fuel vapors,

preventing them from escaping into the atmosphere when they shouldn’t be.

What is the code po497 on a Honda CRV?

The P0497 code on a Honda CRV typically indicates a problem with the evaporative emission (EVAP) system,

specifically relating to a low voltage condition detected in the evaporative emission system’s low purge flow valve control circuit.


Dealing with a P145C trouble code in your Honda vehicle can be concerning, but understanding its causes, symptoms, and repair options can help you address the issue effectively.

By following preventive maintenance tips, you can reduce the likelihood of encountering this code in the future.

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