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Do you have the VIN available? Do both codes come back together? Did you you use new lexus/Toyota valves and pump?
Ok I will look into somethings and get back to you after lunch.
If you have new diverter valves in new pumps this only leaves the Driver module or controller module on the left inner Fender. This supplies power to the air pump and it to the diverter valves to function correctly. The codes you're getting are indicating that the air pressure is not increasing on the diverter valves side or the diverter valve is not opening for bank 1 which is the drivers side. Generally this is caused by the driver module not turning the diverter valves on or open. It is stuck closed it's not likely a bad new diverter valve but more than likely when the diverter valves failed it damaged the driver module on the left inner Fender.
I had to step out for lunch when I get back to my computer I will get you the part numbers of the driver modules.
89581-60010 is the part number and it is just in front of the master cylinder and before the fuse box on top of the inner fender. Make sure the red wire and the black wire with a red tracer have 12 v at the driver module. The black wire with a red tracer supplies power to the diverter valve for bank one and comes from the driver module. The other wires at the diverter valve for bank 1 are controlled by the engine computer to turn the valve on and the ground circuit.
The black with red is the power supply to the bank one diverter valve. Does it get 12v while the truck is started cold and during warm up? If not this would indicate a bad driver module the red is the main air pump power supply and the red with black tracer wire has 12 v and means the AI VVrelay is working.
Is the balck wire with the red tracer at the diverter valve getting 12 v or are you checking at the driver module? Does the white wire with a black tracer and white wire with a red tracer at the diverter valve connector have less then 1 ohm of resistance to ground?
The driver module appears to be normal based on the numbers you are giving me. The only thing left to check is if the computer inputs that are monitored to determine if the valve is opening. The best way to do this is with an active testing scan tool that will open the valves and turn the pump on then monitor the pressures. It is possible you got a bad diverter valve. If the valve are the same left to right you could swap them to see if the codes set for bank 2. On the 2U engine they are the same left and right.
I just check the part numbers are different left to right. It is not likely a wiring issue or computer issue.
I can not post wiring diagrams directly to the website. If you want to discuss the matter via telephone I submitted a phone consultation request to you. Or you can go to www.Techinfo.Toyota.com. For $15 you can purchase a two-day subscription or you can get a one-year subscription at a reasonable price to all of the Toyota/Lexus/Scion diagrams diagnostic flowcharts and information on how to test the system and a complete pin out of the computer.
Lunch time Noon EST is the best time less noise.