Truck not going above 40km/h on small hills?

I have been having problems with the amount of power coming out of my truck it is a 2012 tacoma with a V6. Lately it has been lacking some acceleration and having troubles getting into 3rd gear. This only really becomes an issue if I get stopped at a stop light on or just before a hill since I won't be able to get into 3rd gear and end up slowly going up hills. If I am already going 60km/hr it isn't a problem. Not really sure what the issue decided to post here hoping to get some ideas from some people who have a little more experience than I do, any help is greatly appreciated!

 

Manual or automatic?

 

Automatic

 

Does the engine not have the power or is the transmission not shifting properly.

Do you have a CEL Light on?

 

Ah, a completely separate problem, my CEL, Abs, malfunction, and tire pressure lights are always on. I will have to reset them (they come back on if a few days after resetting them). However, in answer to your problem I believe to be more of a power problem since if increase the throttle I don't get any increase in power even if I shift down to a lower gear it still won't go above 40km/hr and even 'flooring' it any given situation doesn't give me anymore power.

 

You will need to get the CEL Code read to know what it is that is causing your problem.

These are the codes for the AIP Issue: P2440 & P2442.

I suspect you are having an issue with the Auxillary Air Injection Pump and or Valves that injects air into the exhaust to warm up the O2 Sensors.

This is a known issue:

https://www.tacomaworld.com/threads/secondary-air-injection-switching-valve.381997/