Question about 2001 Mazda 626

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What is a evap. emission control sys. leak code #ro455 help my ol lady is killing me with this!!!!

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The code is a large evap leak. 1st check the cap to make sure the seal is in tact and then look at the filler neck and tank for holes.

Posted on Jul 28, 2009

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I have a 2003 Dodge Ram. The emissions light came on and I am wondering what the code P0442 stands for?


P0442- Evap Emission Ctrl Sys Leak Detected (smallleak)
You have a small leak in the emission sys. You can do a smoke test on the vacuum sys and see where the smoke is pulled in and that is the leak,

May 19, 2017 | Dodge Cars & Trucks

1 Answer

I HAVE 2005 CHEVY EQUONIX CHECK ENGINE LIGHT ON HAS CODE-PO455 & PO496 (HELP)


P0455- Evap Emission Ctrl Sys Gross Leak Detected
P0496 Evaporative Emission Sys High Purge Flow
This is the 2 codes you requested and they say you have a leak in the emission sys.

Apr 19, 2017 | Cars & Trucks

1 Answer

Emission failure on 2001 chevy blazer 4.3-


your vehicle has a vent valve solenoid located on the evap canister under the back end of the vehicle. You most likely have a bad vaccuum line going to the evap caniser. Have the vehicle smoke tested to verify. If no leaks are found replace the vent valve solenoid

Oct 25, 2012 | Chevrolet Blazer Cars & Trucks

2 Answers

My 2001 catera out of the blue stopped running. I changed the crank shaft position sensor . I have been told it could be the gas cap preventing it from starting. the code P0455 comes up


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P0450 Evap Emission Ctrl Sys Pres Sensor Error
P0451- Evap Emission Ctrl Sys Pres Sensor Range/Perf
P0452- Evap Emission Ctrl Sys Pres Sensor Lo Input
P0453- Evap Emission Ctrl Sys Pres Sensor Hi Input
P0454 Evap Emission Ctrl Sys Pres Sensor Interm
P0455- Evap Emission Ctrl Sys Gross Leak Detected
P0456- Evap Emission Ctrl Sys Very Small LeakDetected)
P0457 Evap Emission Ctrl Sys Leak (fuel cap loose/off)
P0458 Evaporative Emission Sys Purge Ctrl Valve Circ Low
P0459 Evaporative Emission Sys Purge Ctrl Valve CircHigh
P0460- Fuel Tank Level Indicator Circ Error
P0461- Fuel Level Sensor Circ Range/Per

P2408 Fuel Cap Sensor/Switch Circ
P2409 Fuel Cap Sensor/Switch Circ Range/Perf
P2410 Fuel Cap Sensor/Switch Circ Low
P2411 Fuel Cap Sensor/Switch Circ High
P2412 Fuel Cap Sensor/Switch Circ Interm/Erratic

Sep 17, 2012 | 2000 Cadillac Catera

1 Answer

My check engine light came on and it is a p0442 EVAP SYS, small leak


Evaporative Emission Control System Leak Detected (small leak)
This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

Causes: A code P0442 most likely means one or more of the following has happened:
* A loose or improperly affixed gas cap
* A non-conforming gas cap (i.e. not factory/original brand)
* A small leak/hole in a fuel vapor hose/tube
* Other small leak in EVAP system
* Faulty vent o-ring seal

Possible Solutions: With a P0442, the most common repair is to:
* Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
* Otherwise, replace the gas cap, or
* Inspect the EVAP system for cuts/holes in tubes/hoses


Keep us updated.

Dec 13, 2010 | 2004 Saturn VUE

1 Answer

I am getting Code p0442 Evap Emission system leak detected (small) i have cleared it once already and it came back within a day with this Freeze frame Data: Sys 1 CL Sys 2 CL-Fault Calc Load(%) 47.45...


these are hard to diagnose. First trace evap hose from fuel tank to evap cannister. Check for cracks in hose or loose connections. Check out cannister for cracks. Also check hose from cannister to intake manifold. If hoses are good, it may be leaky purge valve. Hope this helps.

Oct 05, 2010 | 2000 Chevrolet Cavalier

2 Answers

Check Engine lite comes on Code PO440


16824/P0440/001088 - EVAP Emission Control Sys: Malfunction Possible Symptoms
  • Malfunction Indicator Light (MIL) active
Possible Causes
  • Evaporative Emission (EVAP) System leaking
  • Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) faulty
  • Evaporative Emission (EVAP) Canister Purge Solenoid Valve (N115) faulty
Possible Solutions
  • Check Evaporative Emission (EVAP) System Sealing
  • Check Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80)
  • Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve (N115)

Jun 17, 2010 | 2000 Volkswagen Beetle

1 Answer

Jetta 2.0 2000


16826/P0442/001090 - EVAP Emission Control Sys: Small Leak Possible Symptoms
  • Malfunction Indicator Light (MIL) active
Possible Causes
  • Evaporative Emission (EVAP) System leaking
Possible Solutions
  • Check Evaporative Emission (EVAP) System Sealing
    • Check Fuel Cap

May 22, 2009 | 1999 Volkswagen Jetta

1 Answer

My taurus failed due to code p0442 ecap emiss ctl sys leak detected (small leak)


    Continuous Memory Diagnostic Trouble Code (DTC) P0442 indicates that a fuel vapor leak has been detected [as small as 0.10 cm (0.04 inch)] in the Evaporative Emission (EVAP) system.
    Note: Prior to performing the following diagnosis inspect the Canister Vent Solenoid (CV) for contamination. A situation may exist where contamination holds open the Canister Vent (CV) solenoid enough to set DTC P0442 and also plugs the port to atmosphere enough to keep system from being vented quickly.
    • After market parts and accessories nonconforming to the EVAP system specifications.
    • Damaged, cross threaded or loosely installed fuel filler cap.
    • Small holes or cuts in fuel vapor hoses/tubes (EVAP canister tube, EVAP canister outlet tube or EVAP return tube) in the EVAP system.
    • Loose fuel vapor hose/tube connections to EVAP system components.
    • EVAP system component [EVAP canister purge valve, fuel tank pressure (FTP) sensor, canister vent (CV) solenoid, fuel vapor control valve tube assembly or fuel vapor vent valve assembly] seals leaking.
    • CV solenoid partially open when commanded closed.
    • EVAP canister leaking.
  • Check for presence of fuel filler cap.
  • Verify that the CV solenoid is properly seated on the EVAP canister (if possible).
  • Visually inspect for cut or loose connections to fuel vapor hoses/tubes in following locations:
    • EVAP canister to EVAP canister purge valve.
    • EVAP canister to fuel vapor vent valve assembly.
    • fuel vapor control valve tube assembly to fuel tank (if applicable).

Jun 26, 2008 | 1997 Ford Taurus

5 Answers

2001 Dodge Caravan/check engine light


P0442--Evap Emission Sys. leak detected small leak
P0455--Evap Emission sys. leak detected gross leak
P0456--Evap Emission Sys. leak detected very small leak

Jun 07, 2008 | 2001 Dodge Caravan

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