Question about 2007 Chevrolet Colorado

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Please help. We have a 2007 Chevy Colorado and we have codes P0443, P0455, P0446, and P0128. We are thinking about replacing thermostat, purge control circuit, and vent control circuit per the codes. But- we do not know where the purge control valve circuit and vent control circuit are located on the engine. Does anyone know where their located?

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2 Answers

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  • Chevrolet Master
  • 1,014 Answers

Clear the codes and check that the gas cap is seating properly.

No reason to replace parts for a possibly loose or worn out gas cap.

If codes return, trouble shoot first occurance.

Posted on Jan 31, 2019

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  • Chevrolet Master
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First......clear those codes and see if they return before doing anything.Purge valve is on the vent line from tank to engine ,usually in the engine compartment,and vent valve is on the line from tank to outside air,usually by the fuel tank.Don't change any parts until you check them and their circuits with a good scan tool.

Posted on Jan 25, 2019

  • 4 more comments 
  • Jennifer Hart Jan 25, 2019

    Thank you so much for your help. I have reset the codes by unplugging the battery and will wait for the check engine light to come back and reread the codes.

  • Jennifer Hart Jan 31, 2019

    Update: I cleared the codes and changed the gas cap. We now only have one code, which is 443. Any ideas as to what to fix with this generic code?

  • D Aubrey
    D Aubrey Jan 31, 2019

    Possible causes
    Faulty Evaporative Emission (EVAP) Purge Solenoid Control
    Evaporative Emission (EVAP) Purge Solenoid Control harness is open or shorted
    Evaporative Emission (EVAP) Purge Solenoid Control circuit poor electrical connection

  • Jennifer Hart Jan 31, 2019

    Thank you. We will try those one at a time. Thank you. Thank you

  • Rocky Ram
    Rocky Ram Jan 31, 2019

    check here

  • Rocky Ram
    Rocky Ram Jan 31, 2019

    This also goes bad over time

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6 Suggested Answers

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Posted on Jan 02, 2017

  • 48 Answers

SOURCE: keep getting p0443 code and check engine light

might need to replace the purge selonoid valve

Posted on Jul 17, 2008

  • 176 Answers

SOURCE: check engine light on, code P0443

Was the repair facility a Hyundai dealership? If not, I would recommend a second opinion from a certified dealership. This way you will have more information and a better idea as to how much the repair will cost.

The canister in your evaporator system may need to be replaced. These will fill with emissions and cause a trouble code. Hope this helps.

Posted on Jun 11, 2010

roniecon
  • 6927 Answers

SOURCE: evap emisson control system p0443 p0449 mod#10

replace the egr positioning sensor.

Posted on Jan 17, 2012

airjer995
  • 5332 Answers

SOURCE: location on 2001 dodge voyager purge control valve

Look on the passenger front of the engine compartment near the radiator. It will be mounted on a bracket, it will have two hoses attached to it, and have a single connector. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Posted on Feb 22, 2012

  • 457 Answers

SOURCE: code P0443

the purge control valve is back by gas tank and is a major part of evap system and should be replaced and are not to expensive or hard to change.

Posted on Aug 05, 2012

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1 Answer

Just got a check engine light on P0443.


code p 0443 refers to evaporative emission (EVAP) canister purge valve--circuit malfunction===causes--wiring--EVAP canister purge valve--ECM
code p 0446 refers to EVAP system vent control--circuit malfunction===causes wiring---EVAP purge valve ---ECM
check the wiring and connection to the purge valve unit

Jan 31, 2016 | Cars & Trucks

1 Answer

I have code P0443. How can I find out what is wrong?


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1 Answer

Where is the purge valve solonoid for a 2000 chevy cavalier?


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Dec 19, 2015 | 2000 Chevrolet Chevrolet Cavalier Base

1 Answer

My 06 cobalt has these codes can anyone tell me what they mean? Are they an expensive fix? p0446,p0455, p0172


code p0446 refers to evaporative emission (EVAP) system-vent control-circuit malfunction===causes --wiring--EVAP canister purge valve--ECM
code p0455 refers to EVAP system-large leak detected===causes --hose connections--intake leak--EVAP canister---EVap canister purge valve
code p0172 refers to system too rich, bank 1===causes intake blocked---EVAP canister purge valve--fuel pressure ---EGR system---injector/s ---ECM
because the EVAP purge valve appears in all codes I would be inclined to change that unit first the run the fault codes again

Jul 23, 2015 | 2006 Chevrolet Chevrolet Cobalt LT

1 Answer

I have a 2001 dodge ram 1500 code P0443 code came on code p0455 code was on I replace the purge valve then the code p0443 came on


code p0443=It's whining about the control circuit for the purge valve. Make sure you are getting power to the valve, and you see 12 volts on the control side as well.

code p0445 might be just a gas cap problem.

Mar 14, 2015 | Dodge Ram 1500 Cars & Trucks

1 Answer

P0128 engine code fix 2006 colorado


The code means the cooling system is not reaching normal operating temp.
The common cause is a faulty thermostat which you would replace.
It could be something else such as a faulty temp sensor.

Oct 02, 2012 | 2006 Chevrolet Colorado

1 Answer

Solution for engine check up light for code p0441 for hyundai accent 2001


P0441 Evaporative Emission Control System Incorrect Purge FlowOBD-II Trouble Code Technical Description

Evaporative Emission Control System Incorrect Purge Flow
What does that mean?

This indicates that a part of the EVAP control system is no longer functioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and other hoses. 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.

EVAP emission canister purge is controlled by a valve which allows engine vacuum to pull stored fuel vapors from fuel tank into the engine to be burned, rather than be vented to atmosphere. A vacuum switch is used to detect when flow exists. If the PCM commands purge and sees that the switch is closed (indicating no detected purge flow) P0441 is set.
Symptoms

Likely, no symptoms will be discernible to the driver, other than the illuminated Check Engine Light.
Causes

A code P0441 could mean one or more of the following has happened:

  • Bad vacuum switch
  • Broken or damaged EVAP line or canister
  • Open in PCM purge command circuit
  • Open or short in Voltage feed circuit to Purge Solenoid
  • Faulty purge solenoid
  • Restriction in EVAP solenoid, line or canister
  • Corrosion or resistance in purge connector
  • Bad PCM
Possible Solutions

With a P0441 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:

  • Common Chrysler fix - Replace Leak Detection Pump / LDP
  • Repair damaged EVAP lines or canister
  • Repair open or short in voltage feed circuit to Purge Solenoid
  • Repair open in PCM purge command circuit
  • Replace purge Solenoid
  • Replace vacuum switch
  • Repair restriction in Evap line or canister or solenoid
  • Repair resistance in purge connector
  • Replace PCM

Other EVAP DTCs: P0440 - P0441 - P0442 - P0443 - P0446 - P0453 - P0455 - P0456

Jul 11, 2012 | Cars & Trucks

2 Answers

P0449 and P0455 error code 2008 2wd gmc envoy 30,203 miles


P0449 - Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction

P0455 - Evaporative Emission Control System Leak Detected (no purge flow or large leak)

Both are refer at EVAP system; other EVAP DTCs: P0440 - P0441 - P0442 - P0443 - P0446 - P0453 - P0455 - P0456

This indicates a fuel vapor leak or lack of purge flow in the EVAP control system. It means a large 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.

Symptoms: You likely won't notice any drivability problems.
Causes: 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)
Other leak or damaged piece in EVAP system

Possible Solutions: 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, and/or
Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary


Hope helps.

Apr 23, 2011 | 2008 GMC Envoy

1 Answer

It is coming up with p440 code


P0440 - Evaporative Emission Control System Malfunction

This indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and other hoses. 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.

Symptoms: You likely won't notice any drivability problems.

Causes: A code P0440 could mean one or more of the following has happened:
* The gas cap is not installed or working properly
* The purge solenoid has failed
* The canister is plugged and not working properly

Possible Solutions: With a P0440 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
* Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back.
* Inspect the EVAP system for cuts/holes in tubes/hoses
* Inspect for damaged or disconnected hoses around the Evap purge solenoid
* Check and/or replace the sensor
* Check and/or replace the purge valve
* Have a professional use a smoke machine to detect leaks

Other EVAP DTCs: P0440 - P0441 - P0442 - P0443 - P0446 - P0453 - P0455 - P0456

Keep us updated and remember to rate this answer..

Feb 01, 2011 | Chevrolet Venture Cars & Trucks

2 Answers

I checked the codes and one comes up its po446. i dont under stand what it mean so i cant fix it to get the light to go out.


P0446 Evaporative Emission System Vent Control Circuit.
The following are descriptions of all Evaporative possible codes:

P0441 Evaporative Emission System Incorrect Purge Flow
P0442 Evaporative Emission System Leak Detected (small leak)
P0443 Evaporative Emission System Purge Control Valve Circuit
P0444 Evaporative Emission System Purge Control Valve Circuit Open
P0445 Evaporative Emission System Purge Control Valve Circuit Shorted
P0446 Evaporative Emission System Vent Control Circuit
P0447 Evaporative Emission System Vent Control Circuit Open
P0448 Evaporative Emission System Vent Control Circuit Shorted
P0449 Evaporative Emission System Vent Valve/Solenoid Circuit
P0450 Evaporative Emission System Pressure Sensor/Switch
P0451 Evaporative Emission System Pressure Sensor/Switch Range/Performance
P0452 Evaporative Emission System Pressure Sensor/Switch Low
P0453 Evaporative Emission System Pressure Sensor/Switch High
P0454 Evaporative Emission System Pressure Sensor/Switch Intermittent
P0455 Evaporative Emission System Leak Detected (large leak)
P0456 Evaporative Emission System Leak Detected (very small leak)
P0457 Evaporative Emission System Leak Detected (fuel cap loose/off)
P0458 Evaporative Emission System Purge Control Valve Circuit Low
P0459 Evaporative Emission System Purge Control Valve Circuit High
---
At least the cap isn't loose for the gas tank.

I would clear the code with an OBD-II Scanner 'erase code' button, and see how long it takes for it to come back.

Aug 06, 2010 | 1996 GMC Jimmy

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