Question about 2001 Toyota Echo

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P0440 engine code only

Replaced gas cap with new Toyota one, cleared code with scan tool- coded returned in a few days. Found broken small rubber hose from firewall to air filter housing - replaced and cleared code-- code returned.Replaced evap canister cleared code - code returned. I notice no vacuum hiss when I remove gas cap like it used to. Any suggestions? JW

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Martin Bergin

  • 133 Answers

SOURCE: I have a 2000 Toyota Echo with a P0440 code on the

Clean the air flow meter with carb cleaner spray and that should do the trick'

Posted on Mar 08, 2010

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SOURCE: check engine light . shows

Your best bet is a repair shop with an EVAP
Smoke Machine,to quickly check for leaks.

You won't see or feel anything without smoke
in the system.

Posted on May 23, 2011


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Have a 2005 Toyota Sienna. Replaced VVT solenoid last weekend Tonight I get P0018, P0022 and P0442 codes all together.

P0018 OBD-II Trouble Code: Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor A) P0442 TOYOTA - EVAP System Small Leak Detected P0022 - "A" Camshaft Position - Timing Over-Retarded (Bank 2)

So to answer your question no not all three, it would however triggerr the EVAP code p0442 , the other codes could have been original stored and just came out latter so cnacell all codes and see if any return.

Mar 31, 2018 | Toyota Cars & Trucks

1 Answer

2004 jeep grand cherokee code 442/455

OBD code P0442 Small EVAP leak detected you may need to check the EVAP canister under the vehicle and the purge valve as well check for cracks on the canister or the purge valve and check all the rubber hoses connected to them foe cracks or holes. If you find any damage parts replace them. P0455 which means a large EVAP leak is sometimes referred as the gas cap leak check your gas cap and secure it tight if you still have the code change the gas cap hope this helps after you find and fix the problems get the vehicle to a shop and they will use an OBD scan tool to clear the codes.

Feb 26, 2014 | Cars & Trucks

1 Answer

What's causing the P0456 code?

  • A small leak in any of the EVAP hoses or fuel tank hoses
  • A small leak in the purge valve or vent valve
  • The EVAP Canister may be leaking- be sure fuel cap is sealing good, if in doubt replace fuel cap.

Jan 10, 2012 | Cars & Trucks

3 Answers

I have a 2008 silverado PU. The engine code PO 449 and PO 455 shows. what problem are these codes

this is an obd2 trouble code table, it can help you understand the meaning of code.
for the p0445, the causes:
A loose or improperly affixed gas cap
A non-conforming gas cap (i.e. not factory/original brand)
Other leak or damaged piece in EVAP system
Possible Solutions:
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, and/or
Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary.
I know this tool can help you clear the code.

Jul 14, 2011 | Chevrolet Silverado 1500 Cars & Trucks

4 Answers

Code PO442 . nothing found. Will light reset on its own?

Hi there,

Code P0442 relates to the Evaporative Emmission Control (EVAP) system and denotes a small leak.

The EVAP system prevents the escape of dangerous fuel vapours - these vapours are re-directed to what's called a Charcoal Canister (looks like a medium-sized cylinder with tiny hoses running to it).

As this relates to fuel vapours, one of the most common causes can be as simple as the petrol cap is not screwed on tight enough (or has been recently replaced with an incorrect aftermarket type). Other causes can be a hose has come off somewhere, a hose has a pin-hole or is perforated.

This type of code will usually itself after a few trips, but most people prefer to clear codes after resolving the cause.

First, check the petrol cap.
Second, you will need to trace all hoses within the Evap system and check for any signs of leakage (wear or damage etc), and remedy accordingly.

Codes can be cleared either by using a suitable Diagnostic Scan Tool, or simply disconnecting the NEGATIVE lead of your car battery for a few minutes, then reconnecting (Note: if the battery is disconnected or goes flat, run engine after power is restored, to allow the engine to relearn its settings).

If the code returns, then you should have the Evap system checked properly by an authorised dealership.



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May 06, 2011 | 2000 Buick Regal

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Ihave dodge caravan sport 2001 and ihave this code in my car-p0442 how i fixed ?

This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. .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.

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

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
Few places to check - rubber hose under air box (requires removing the air box) and hoses connecting to EVAP system under the van on the drivers side.

Jan 12, 2011 | 2001 Dodge Caravan

2 Answers

GM Code 442

Do you mean code P0442? I would assume that's what you mean since you said it relates to the Evap System

This code indicates that there is a fuel vapor leak in the system. This means that a very small leak has been detected. The leak can be from a hole as small as 1mm

This code point towards any of the following:
a loose gas cap or a non factory spec gas cap
a small leak or hole in the fuel vapor hose/tube
faulty vent o-ring seal

The most common fixes is to re install the gas cap, clear the codes, and see if the code returns. Or replace the gas cap and clear the codes and see if it returns. Finally inspect the hoses/tubes for cuts/holes

This code in no way points to a canister requiring to be replaced.

Sep 29, 2009 | 2005 Pontiac Sunfire

2 Answers


You have to know what code is stored to fix the problem. Toyota's will generally display a Check Engine light, VSC and TRAC light all at the same time, even if it's a simple problem with an oxygen sensor (for example). You can disconnect the negative battery cable for a few minutes, even though you should a scan tool should be used, to clear out the code.

Jul 18, 2009 | 2006 Toyota Sequoia

2 Answers

Check engine light is on...

I am not going to lie, I came across this in another forum a while back and I would love to retype it and interpret it here but it is too much. I looked at it and verified that the information here is information that could be found through my scan tools so here it is!

The fuel tankmag-glass_10x10.gif pressure is atmospheric pressure after the vehicle is driven for 20 min (2 trip detection logic).

Possible Problems
Fuel tank cap incorrectly installed <= Most common
Fuel tank cap cracked or damaged (Toyota part only)
Bad vapor pressure sensor/circuit
Vacuum hose cracked, holed, blocked, damaged or disconnected 
Hose or tube cracked, holed, damaged, or loose
Fuel tank/filler neck cracked, holed, or damaged
Charcoal canister cracked, holed, or damaged (collision)

In above description, check hoses between vapor pressur sensor and VSV for vapor pressure sensor and charcoal canister. Also, hose between charcoal canister and fuel tank.

Mar 11, 2009 | 2002 Toyota Camry

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