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P0455 Chrysler Code - EVAP System Large Leak

Quick Answer

The P0455 code for Chrysler vehicles indicates a large leak in the Evaporative Emission Control (EVAP) system. Common causes include Loose or Damaged Gas Cap: A loose or damaged gas cap is a common cause of an EVAP system large leak, Leaking EVAP System Hoses: Cracked, disconnected, or damaged hoses in the EVAP system can lead to leaks, Faulty EVAP Purge Valve: A malfunctioning purge valve can cause the EVAP system to remain open, resulting in a large leak. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means
P0455 Chrysler indicates EVAP System Large Leak.
Common causes
Common causes include Loose or Damaged Gas Cap: A loose or damaged gas cap is a common cause of an EVAP system large leak, Leaking EVAP System Hoses: Cracked, disconnected, or damaged hoses in the EVAP system can lead to leaks, Faulty EVAP Purge Valve: A malfunctioning purge valve can cause the EVAP system to remain open, resulting in a large leak.
Severity
Low - monitor the vehicle and repair when practical.
Can I drive?
The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code P0455 Chrysler Description

The P0455 code for Chrysler vehicles indicates a large leak in the Evaporative Emission Control (EVAP) system. The EVAP system is responsible for capturing and containing fuel vapors to prevent them from being released into the atmosphere. A large leak in this system can lead to increased emissions, reduced fuel efficiency, and potential damage to other components.

OBDII Code P0455 Chrysler - EVAP System Large Leak
P0455 Chrysler Code - EVAP System Large Leak

Common Causes of P0455 Chrysler

  1. Loose or Damaged Gas Cap: A loose or damaged gas cap is a common cause of an EVAP system large leak.
  2. Leaking EVAP System Hoses: Cracked, disconnected, or damaged hoses in the EVAP system can lead to leaks.
  3. Faulty EVAP Purge Valve: A malfunctioning purge valve can cause the EVAP system to remain open, resulting in a large leak.
  4. EVAP System Leak Detection Pump Failure: The leak detection pump is responsible for monitoring the EVAP system for leaks. A failure in this component can trigger the P0455 code.

Symptoms of P0455 Chrysler

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the vehicle's dashboard.
  2. Strong Fuel Smell: A noticeable fuel smell inside or outside the vehicle may indicate a leak in the EVAP system.
  3. Decreased Fuel Efficiency: Large leaks in the EVAP system can cause the engine to consume more fuel than usual.
  4. Rough Idling: The vehicle may experience rough idling or stalling due to the presence of excess fuel vapors in the engine.

How to Fix P0455 Chrysler

  1. Check Gas Cap: Ensure the gas cap is tight and in good condition. Replace if necessary.
  2. Inspect EVAP System Hoses: Check all hoses in the EVAP system for cracks, leaks, or disconnections. Replace any damaged hoses.
  3. Test EVAP Purge Valve: Test the purge valve for proper operation and replace if faulty.
  4. Check Leak Detection Pump: Inspect the leak detection pump for any signs of damage or failure. Replace if needed.
  5. Clear Codes: After making the necessary repairs, clear the diagnostic trouble codes and reset the check engine light.

Cost to Fix P0455 Chrysler

The typical repair costs for addressing a P0455 code in a Chrysler vehicle can range from $100 to $500, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Keep in mind that rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more affordable options.

What does this mean?

Tech Notes for P0455 Chrysler

The P0455 it’s a quite common code because the code is set if the gas cap is loose or missing. Start by tightening the gas cap and clearing the code. In most cases, the code can be clear by disconnecting the car battery for about 30 minutes.

The P0442 code means that the control module has detected a small leak in the Evaporative Emission (EVAP). A loose fuel tank filler cap is the most common cause that triggers the P0442 code.

Dodge EVAP Diagnosis & Repair Diagnosis Troubles Codes P0442 and P0455




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When is the Code Detected?

Malfunction is detected when EVAP control system has detected a large leak.

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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 P0455 Chrysler Code

1. What does the OBDII code P0455 mean on a Chrysler vehicle?

P0455 indicates a large leak in the EVAP (Evaporative Emission Control) system, which prevents fuel vapors from escaping into the atmosphere.

2. What are common symptoms of code P0455 in a Chrysler?

Symptoms may include the Check Engine Light turning on, a noticeable fuel smell near the vehicle, and, in rare cases, a slight decrease in fuel efficiency.

3. What are the most common causes of a P0455 code on a Chrysler?

Common causes include a loose or damaged gas cap, a cracked or disconnected EVAP hose, a faulty purge valve, or a damaged EVAP canister.

4. Can a loose gas cap trigger a P0455 code?

Yes, a loose, missing, or damaged gas cap is one of the most frequent causes of a P0455 code.

5. How do I fix the P0455 code on my Chrysler?

Start by ensuring the gas cap is tight and in good condition. If the code persists, inspect the EVAP hoses and components for leaks or damage and replace any faulty parts.

6. Is it safe to drive a Chrysler with a P0455 code?

Yes, it’s generally safe to drive with a P0455 code, but it’s best to address the issue promptly to avoid potential long-term damage to the EVAP system.

7. How do I diagnose a P0455 code on a Chrysler?

Begin by checking the gas cap. Then inspect EVAP hoses and components for cracks, disconnects, or other damage. A smoke test may help locate leaks if the issue isn’t immediately visible.

8. How much does it cost to repair a P0455 code on a Chrysler?

Repair costs vary depending on the cause. A gas cap replacement may cost $20-$50, while repairs to hoses or valves can range from $100 to $300 or more.

9. Can extreme weather cause a P0455 code in a Chrysler?

Yes, extreme hot or cold weather can sometimes cause EVAP components like hoses or seals to crack, leading to a P0455 code.

10. Will clearing the P0455 code fix the issue?

Clearing the code will reset the Check Engine Light, but if the underlying issue isn’t addressed, the code will likely return.

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