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What do P0453 and P0446 codes mean on a chevy 2002 blazer

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Posted on Jan 02, 2017

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chiquititas
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SOURCE: 2002 prizm with p0440 code

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Posted on Jun 19, 2008

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SOURCE: 2007 Chevy Colbalt 2.2 engine P0446 Code is on.

Code P0446 is related to your vehicles evaporative emissions system. Often this is caused by your gas cap not being properly tightened.

Before running out and spending money on this issue be sure the gas cap is in good condition and make sure it's tight. (At least 2 or 3 turns after it begins to click)

Drive the car for a few days. If the check engine light doesn't turn off you will need to go to a repair shop who can scan and troubleshoot the problem.

Good luck.

Posted on Jan 30, 2010

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SOURCE: i have a p0446 code

michael_cass_34.jpg Here it is..not too clear...best i can do...Hope this helps you ???

Posted on Jun 10, 2011

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SOURCE: 2002 chevy blazer service engine soon

a blown fuse can cause the obd ll port not to work check the fuses under the hood and replace the blown one than rescan ur truck because a blown port fuse usually doesnt set off the service engine light

Posted on Oct 25, 2011

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02 Chevy blazer p0155,p0446 codes. What to do?


EVAP Evaporative Emission Control System .follow this link for the P0446 fault , this is a problem with the Engine Evap valve , this link describes in detail the system etc. The other code P0155 is for the Front Oxygen sensor bank 2 , this could be a faulty wiring connection or the sensor its self so further diagnosis will be required .I would advice using a good quality fuel addative , one that covers the catalytic convertor as well as the usual engine parts, injectors etc as there may just be build up of carbon on the sensor that is restricting the signal being recieved , keep me posted if you wish

Feb 01, 2015 | 2002 Chevrolet Blazer

1 Answer

What does the code P0446 onn a 2002 2.4l 4 cylinder Dodge Stratus SXT mean?


Generally in google search type obd2 then po446 or whatever and an obd2 site will come up w specifics for that code. Vehicle specific generally doesnt matter. http://www.obd-codes.com/p0446 typing odb2 before the code is important to find the right site. Refer to link for specifics or search using that format I suggested.

Sep 08, 2014 | 2002 Dodge Stratus

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

2 Answers

I have a 2002 Chevy Blazer..I had to replace fuel pump. I drove for a little while and parked it. Now it will not start. Had it scanned and the the results was P0453 would this effect it from starting??


Is your float sensor working properly? If oil was the problem and you resolved it, you may need to take it to a specialist to further diagnose the problem. -----------------------------------------------------------------------------------------
Launch X-431 IV Auto Scanner

Mar 08, 2013 | 2002 Chevrolet Blazer

2 Answers

2001 chevrolet sububban po446,452,and 453 how do i fix my check engine light is on and i cant pass in spection


DTC 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. Evap vent valve is usually supplied Batt. voltage with key on. The ECM's driver controls the ground, and when grounded, activates the valve (closing it). If the ECM detects a short to ground, and open,or a short to battery voltage on the control circuit, P0446 will set. Code also may refer to ECM detecting that EVAP system is unable to achieve or maintain vacuum during test. A code P0446 could mean one or more of the following has happened:
  • Faulty vent valve
  • Open, short or excessive resistance on Vent valve control circuit
  • Blockage of vent valve
  • Bad PCM
Possible Solutions
  • Replace Vent valve
  • Repair open, short, or resistance problem in control circuit
  • Repair open, or short, or resistance problem in power circuit
  • Replace PCM

DTC P0452 - Evaporative emission control system, pressure sensor low imput
DTC P0453 - Evaporative emission control system, pressure sensor high imput

The PCM monitors the EVAP control system FTP sensor input signal to the PCM. The test fails when the signal average jumps above a minimum allowable calibrated parameter. If both codes are present, it sounds like your fuel tank pressure sensor has failed.

The sensor is on top of the tank and you will have to remove the tank. But your symptoms are pointing to more than just the sensor. You may have wiring problems.


Hope this helps (remember to rate and leave a comment about this free answer).

Sep 30, 2011 | 1998 Cadillac Seville

1 Answer

I have a 2004 pontiac montana with codes p0446 and p0453 no noticable drivability problems


this is an obd2 trouble code table, it can help you understand the meaning of code.
for the p0446, the solution:
Replace Vent valve.
Repair open, short, or resistance problem in control circuit.
Repair open, or short, or resistance problem in power circuit.
Replace PCM.
for the p0453,
Using an scan tool access FTP sensor value with Key on Engine off (KOEO). Normal value is usually somewhere near 2.5 Volts at atmospheric pressure (may fluctuate some due to altitude). It shouldn't ever be above 4.5 Volts.
1) If it is close to 2.7V with the gas cap off, the problem is likely intermittent. Using a Digital Volt Ohm Meter, measure the voltage on the signal wire while trying to induce the problem by wiggle testing all the wiring at the FTP sensor. If the voltage fluctuates when wiggle testing, check for connector problems; i.e. water in the connector, broken or chafed wiring.
2) If the value shown on the scan tool is above 4.5V, unplug the sensor (if possible) and check for voltage again. If the high voltage is still present when unplugged, inspect wiring harness for a short to voltage on the signal wire. If the high voltage disappears when unplugging the sensor, check for a good ground to the sensor and proper reference voltage. If you have a good ground and 5 Volts reference voltage, replace the FTP sensor since it's likely shorted out.

Jul 21, 2011 | Pontiac Montana Cars & Trucks

1 Answer

I have a 2000 Pontiac Bonneville 3.8 non supercharged. It is throwing the codes P0446, P0452, P0453. Yes it is throwing all of them and that is what is confusing me. Just reset the codes, did a...


they are all emission faults

P0453 OBD-II Trouble Code: Evaporative Emission Control Pressure Sensor High Input. P0453 code means that a reading from the engine's evaporative pressure sensor is higher than normal due to fuel tank vapor leaks into the system.

saturated carbon canister
sensor faulty
rubber evap hoses at the tank perished

idea
check the tank fuel cap seal is working
replace the cap is one possible cause

check the fuel pump pressure or for injector rail leak
P0446 Evaporative Emission Control System Vent Control Circuit Malfunction. The code P0446 is set when the engine computer recognizes a fault or restriction at the vent control part of the Evaporative emission control system (EVAP).

The Code P0452 indicates that the Evaporative Pressure Sensor is indicating pressure change values that are below specification, during the EVAP Monitor test and/or the operation of the vehicle.


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Apr 28, 2017 | 2000 Pontiac Bonneville

1 Answer

04 chevy avalanche. failed inspection. OBD11


Hi, a P0446 means Evaporative Emission Control System Vent Control Circuit Malfunction

Full details @ http://www.obd-codes.com/p0446

Feb 06, 2010 | 2004 Chevrolet Avalanche

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