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2002 Silverado wont change from defrost to floor


either the heater control or the lil motor that adjusts the door is shot.
i believe the motor is on top of the heater box behind the radio for the vent function there is also a blend door motor on the side (hot to cold) of the heater box.unplug the vent motor cycle the defrost/ floor knob and test for power . no power bad heater control .power present bad vent door motor. auto wreckers are the best place for these parts (cheapest) some will also test/ install

Mar 07, 2015 | 2002 Chevrolet Silverado 1500

1 Answer

1996 chevy blazer 4wd 4.6 liter evap code p0446? what is the problem?


P0446 Evaporative Emmission Control System Vent Control Circuit

Evap vent valve has only one purpose. It closes in order to seal the vent so the EVAP system can pressurize and ensure there are no leaks.

This code could mean one or more of these issues have happened:

Faulty vent valve
Open, short or excessive resistance on Vent valve control circuit

Blockage of vent valve

Bad PCM

Here are some things you can try:

Replace Vent valve

Repair open, short, or resistance problem in control circuit

Repair open, or short, or resistance problem in power circuit

Replace PCM

Oct 17, 2013 | 1996 Chevrolet Blazer

1 Answer

Only the center dash vent blows heat and the rest of them very little power ...why?


There are multiple issues that prevent heat from coming through the vent. You'll need to see a mechanic. ----------------------------------------------------------------------------
Multi-cardiag M8

Jan 24, 2013 | 2003 Pontiac Grand Am

1 Answer

Getting computer code p1665 fuel level output circuit. Fuel gauge appears to be shorting out because it is always reading full


CODE P1665 - EVAP VENT SOLENOID CONTROL CIRCUIT MALFUNCTION CONDITIONS.POSSIBLE CAUSES / VENT SOLENOID CONTROL CIRCUIT OPEN SHORTED TO GROUND OR TO SYSTEM POWER / VENT SOLENOID POWER CIRCUIT IS OPEN CHECK THE ENG CNTL FUSE / EVAP VENT SOLENOID IS DAMAGED OR HAS FAILED / PCM HAS FAILED.

Nov 04, 2010 | 1999 Oldsmobile Alero

1 Answer

Scanned = p-0449, cleared 2x, replaced sol valve, returned


The usual problem is the vent valve.This is what usually goes bad on these with this code.The vent valve is under the rear spare tire area or by the fill pipe and gets dirt and debris inside and it malfunctions.If you have a scan tool then go into out put test and command the vent valve on and off.You should hear a click.If you don`t hear a click then check for power to the vent valve with a test light.If you have power then replace the valve.Hope this helps.Good luck.

Mar 24, 2010 | 2006 Chevrolet Tahoe

1 Answer

Trouble code po449 2006 chevy avalanche


CODE PO449 -EVAP VENT SYSTEM PERFORMANCE CONDITION.POSSIBLE CAUSES. VENT SOLENOID CONTROL CIRCUIT IS OPEN OR SHORTED TO GROUND OR.VENT SOLENOID CONTROL CIRCUIT IS SHORTED TO SYSTEM POWER B+.OR VENT SOLENOID POWER CIRCUIT IS OPEN TEST THE ENG 1 FUSE.OR VENT SOLENOID IS DAMAGE OR HAS FAILED.OR PCM HAS FAILED.

Aug 19, 2009 | 2003 Chevrolet Silverado 1500

1 Answer

A/C in front vent are cold , A/C on REAR vents are


your belt chould be wearing out and that will cause sqeeling and loss of power for the vents

Jul 09, 2009 | 2002 Chevrolet Tahoe

2 Answers

Engine trouble code 0499 2004 dodge dakota manual 5 speed 4.7 4x4


P0499 Evaporative Emission System Vent Valve Control Circuit High, REPLACE THE SOLENOID.

Jun 24, 2009 | 2004 Dodge Dakota

1 Answer

I turned on my AC it kicked on but no air came out of the vents


Check the fuses & if good check for power at any of the vent motors at any selection. If you have power,suspect the body module.

Jun 24, 2009 | 2004 Dodge Ram

1 Answer

Motor problems


Technical Description:
EVAP Control System Canister Vent Solenoid Circuit Malfunction
The EVAP system monitors the canister vent (CV) solenoid circuit for an electrical failure.
The test fails when the signal moves outside the minimum or maximum allowable calibrated parameters for a specified canister vent duty cycle by PCM command.
Symptoms: You will likely not notice any drivability problems.
Causes: A code P1451 may mean that one or more of the following has happened:
*VPWR circuit open
*Damaged canister vent solenoid
*Canister vent solenoid circuit open or shorted to ground, power, etc.
*Damaged Powertrain Control Module (PCM)
*Possible SolutionsVerify canister vent solenoid - To verify normal functioning, monitor the EVAP canister vent solenoid signal PID EVAPCV and the signal voltage
(PCM control side).With the valve open, EVAPCV indicates 0% duty cycle and a voltage approximately equal to battery voltage.
When the valve is commanded fully closed, EVAPCV indicates 100% duty cycle, and a minimum voltage drop of 4 volts is normal.
Output test mode may be used to switch output on/off to verify function.
*Replace canister vent solenoid

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Aug 07, 2008 | 1999 Ford Explorer

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