Question about 2001 Chevrolet Silverado 1500

1 Answer

Need help diagnosing codes

These 4 codes came up on my 2001 Chevy Silverado, 1500. po446 po452 po453 po456 I know what the codes stand for, however, do not know where to go to fix the problem. Thanks for any assistance.

Posted by on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 82 Answers

Go to and look up the codes.

Posted on May 13, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

1998 chevy silverado code po453

The fuel tank pressure switch is on top of the fuel pump and the fuel pump is inside the top of the gas tank.

Feb 10, 2015 | 1998 Chevrolet K1500

1 Answer

Po452 and po446 on 04 chevy silverado have replaced fuel pressure sensor and reset but code po452 keep poping up

P0452 evap control pressure low, P0 446 evap vent contol circuit. Becuase you have P0452 you are dealing with a eletrical issue whether you have positive tank pressure or negative pressure, The tool for this is a volt meter.452 happens when you positive pressure and the FTP reads less than 0.1 volts.You need to jump the signal and the reference and monitor the take parameter on a scan data you should read reference voltage.Now if you dont have a scan data tool. inspect the wire for any breaks or shorting 2 thing of concern broken wire to the FTP or a ECM is needed.

Feb 24, 2012 | Chevrolet Silverado 1500 Cars & Trucks

2 Answers

Abs light on with a p0452 code

ABS -- is one problem
Possible Wheel Speed Sensor ,but
you can't guess Use codes & other
resouces to diagnose

EVAP System Code PO452 -- may be a
Pressure Sensor issue ,all I have is Low Input
I assume that means high resistance in the solenoid coil,
thus low voltage detected
Again- need scanner & evap smoke machine ,to check out,
unless your guy shot guns common items & gets lucky at
your expense,changing parts

Aug 04, 2011 | 2000 Chevrolet Blazer

1 Answer

What does an obd11 code of po446 mean on a 2000 chevy silverado 1500?

It is for the canister vent solenoid. Gm has a service bulletin out on this. They have changed the location of the solenoid. They have a repair kit for about 100 dollars that comes with the solenoid and the lines and instructions for moving the solenoid to its new location.

Apr 09, 2010 | 2000 Chevrolet Silverado 1500

1 Answer

How do i fix gm code po446 and po453


Kindly tell me the Make, Model and Year of the Car. You might need to Inspect Certain Components and the Location would be Different for Different Models.

Let me know,so that we could proceed.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Mar 06, 2010 | 1998 Cadillac Seville

2 Answers

Codes po452 and po453

both codes point to the fuel tank evap pressure sensor. High and low input faults.
Try clearing the codes first and seeing if they come back

You may have a vacuum leak, cracked or open vacuum line or faulty sensor.

Dec 21, 2009 | 2001 Chevrolet Blazer

1 Answer

Emmisions codepo442,po446,po452,po453

Hi there,

These codes are for the fuel system the system performs a pressure test when the vehicle reaches a certain speed for a certain period of time, predetermined from the factory. The Gas cap is the most likely suspect.  Disconnecting battery will reset (and delete) all error codes and clear the check engine light, VSC, etc. idiot lights on the dash.

Post further comments if further you have the same problem....

Good Luck!!


Dec 12, 2009 | 2000 Oldsmobile Bravada

3 Answers

Po452 trouble code changed sensor engine light

you might try unhooking the battiey for 20min both + and - posties cuz that will force the computor to have to resest only if you have addressied the fuel pressure problem which taht would most likly be your filter which isn't all that much

Sep 21, 2009 | 2000 Chevrolet Silverado

2 Answers

1998 chevy malibu turned car off at gas station want start back

sounds like an antitheft system malfunction - check to see if light stays on after you remove the key

Jan 09, 2009 | 1998 Chevrolet Malibu

1 Answer

Turned car off at gas station want start back acts like missin

all of these problem codes refer to EGR valve and emission controls. It may be, if egr was fixed, it would be ok!! take off EGR valve and clean carbon from egr hole in engine and from EGR valve. if egr valve is bad or plugged with carbon then the car will act like it is not getting fuel, it will bog down.

Jan 07, 2009 | 1998 Chevrolet Malibu

Not finding what you are looking for?
Cars & Trucks Logo

1,672 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

76051 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8265 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides