I have a 2002 pontiac Aztek it is showing codes 452 and 449 what are these.

Better to do that with a high end scan tool. You can't do it by disconnecting the battery overnight, but that can cause all sort of new problems. Where you say your speedometer 'sets' at 55mph, do you mean always stays at 55 even stopped, or do you mean if 'sits' at 55 even if you are doing 110?

The most likely cause of all this the VSS (vehicle speed sensor)

https://repairpal.com/where-is-the-vehicle-speed-sensor-located-808

2005 Pontiac Aztek Vehicle/Transmission Speed Sensor ...

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Results 1 - 8 of 8 - Equip cars, trucks & SUVs with 2005 Pontiac Aztek Vehicle/Transmission Speed Sensor from AutoZone. Get Yours Today! We have the best ... US$21.49 · ‎In stock

Pontiac Aztek ABS Speed Sensor - Front and Rear ABS ...

www.partsgeek.com > mmparts > pontiac > aztek

Most orders are shipped the same day. They are available for the following Pontiac Aztek years: 2005, 2004, 2003, 2002, 2001, 05, 04, 03, 02, 01. This part is also ...

Pontiac Aztek Vehicle Speed Sensor - GM Parts Giant

www.gmpartsgiant.com > Pontiac > Aztek

Shop lowest-priced OEM Pontiac Aztek Vehicle Speed Sensors at GMPartsGiant.com. All fit 2001 - 2005 Pontiac Aztek and more.

Try pontiac aztek 2002 shift solenoid location Google Search

Look at pontiac aztek 2002 shift solenoid location Google Search

Your vehicle thinks it has been stolen. Go to a GM dealer and he can look up the code to tell the car it has not been stolen.

On this website (link below) you find fuse box diagram and description for Pontiac Aztek (2002)

Pontiac Aztek 2002 fuse box diagram Auto Genius

On this website (link below) you find fuse box diagram and description for Pontiac Aztek (2002)

Pontiac Aztek 2002 fuse box diagram Auto Genius

only dealers sell that broken piece...
i prefer that you go to get the part from the closest Pontiac dealer

loose body groung or earth.or defective instrument cluster.

if it is analog, it is similar to the Grand Prix's. google 2002 Grand Prix odometer fix, you will find the solution there

go to www.autozone.com and become a memmber add the aztek to the list (free service)