How to Smoke test an EVAP leak

Evaporative Emission Control System Leak Detected


- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking

Tech notes

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

When is the code detected?

Evaporative Emission System (EVAP) control system has a very large leak such as fuel filler cap fell off, EVAP control system does not operate properly.

Possible symptoms

- Engine Light ON (or Service Engine Soon Warning Light)
- Possible a noticeable fuel odor caused by the release of fuel vapors

P0455 Description

This diagnosis detects leaks in the Evaporative Emission System (EVAP) purge line using engine intake manifold vacuum. If pressure does not increase, the Engine Control Module (ECM) will check for leaks in the line between the fuel tank and EVAP canister purge volume control solenoid valve under the following vacuum test condition.

The vacuum cut valve bypass valve is opened to clear the line between the fuel tank and the EVAP canister purge volume control solenoid valve. The EVAP canister vent control valve will then be closed to shut the EVAP purge line off. The EVAP canister purge volume control solenoid valve is opened to depressurize the EVAP purge line using intake manifold vacuum. After this depressurization is implemented, the EVAP canister purge volume control solenoid valve will be closed.

OBDII Code P0455 - Evaporative Emission Control System Leak Detected Gross Leak - AutoCodes.com

P0455 Information for specific makes

Need more help?

Do you need more help with the P0455 code? Ask a question to our users or find an automotive repair shop near you to help fix the OBDII code

Help AutoCodes.com

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P0455 code? Have you replaced any parts?
Any information is appreciated. Thanks


Share this article





Related Posts



Latest Posts
Open loop Meaning
Open loop Meaning
In the continuing quest to find meaning…
Traction control system warning Light
Traction control…
Traction control systems are very common…
Motorcycle Traction control system
Motorcycle Traction…
Traction Control is the latest must-have…
Aircraft Flight Control Systems
Aircraft Flight…
Aircraft manufacturers are consolidating…
Open loop diagram
Open loop diagram
[sysp, sysc] = getlinplant(block, op)…
Search
Featured posts
  • Emission control system leak
  • EVAP Emission control system leak small
  • EVAP Emission control system leak
  • Engine Emission Control Systems
  • Emission control system Malfunction
  • Fault in emission control system
  • P0443 Evaporative Emission Control System
  • Positive control Systems
  • Evaporative Emission System Vent Control Circuit
Copyright © 2017 l www.oliver-control.com. All rights reserved.