Codes P0300, P0463 and P0128?

JODUHMS30

MEMBER
2006 CHEVROLET MALIBU
2.2L
4 CYL
2WD
AUTOMATIC
226,000 MILES

My car listed above LT model, will drive fine for a while then it starts to shake terribly clank and almost all out completely to a breakdown with all the gauges reading normal and fine along with no fluid leaks of any kind. I've never missed an oil change or ever ran it below a quarter tank of gas. Also, do regular fuel treatments along with maintenance. I've rebuilt it steadily from rims, tie rods, wheel bearings, shocks, struts, calipers, pads, rotors, alternator, battery, tune up, ignition control module, hoses to the heater core, but cannot figure out what is going on. Please, I need your help with all these codes. What is most likely to be causing it to shake terribly roughly in idle especially and barely go? When I push on the gas pedal it randomly doesn't do it all the time, just once in a while, but it's been happening more frequently lately. I'm not sure what to do. I need help!

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
42,882 POSTS

Hello, the P0463 code the fuel pump module, needs to be replaced. I would use an AC Delco unit, also the P0128 code is telling you the engine cooling system thermostat needs to be replaced. Then when the jobs are done, I would clear the codes to see if the P0300 goes away. Check out the repairs in the diagrams below and I have included generic guides as well to help you understand the repairs.

https://www.2carpros.com/articles/replace-thermostat

and

https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump

You will need to drain the coolant and the gas out of the car before you begin. Here is a video to help show you how:

https://youtu.be/Q5MH2gnyFH0

Check out the diagrams (below). Please let us know what happens.

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