Check Engine Light On problems of the 2003 Toyota Tacoma

Purchased used vehicle from private seller. On the first day of use, after obtaining new title, tags, insurance coverage, the check engine light came on. The following day scheduled service w/ the local Toyota dealer. Upon inspection was told that the truck needed a catalytic converter and there was a recall for the lower front ball joints that the dealer will replace for free. The dealer had to order the parts. After receiving the parts and upon start of the repairs, I received a phone informing me that the frame was rusted and the vehicle is deemed unsafe to drive. I was given an 800 phone number to call and deal directly with Toyota corporate office. I am patiently awaiting for a response.

My engine light on my 2003 Toyota Tacoma keeps coming on. I sent $1000 to replace the oxygen sensor and then the evap connector assembly. The engine light is still on. The repair shop told me they've replaced many of these on Toyotas.

Intermittent check engine light and rough idle - 2003 Toyota Tacoma 2. 7l auto, double cab, 55k miles check engine light came on. Took vehicle to local chain shop who diagnosed error code po511 - idle air control valve (iacv). Toyota parts department prices this part at $226 and service manager indicated $249 for labor (not including tax). Vehicle currently has 55k miles on it and "engine" should be covered by 6 yr/60k mile powertrain warranty. Took vehicle to dealer (to have other recalls corrected) who indicated a $90 fee was required just to diagnose check engine light. Toyota customer service indicated the iacv was only covered to 3yr/36k and that I should pay dealer fee and seek "factory assistance" for any costs to repair. I contend that this type of a part - not serviceable/maintainable by the customer, should be guaranteed against failure for more than ~50k miles and repair should be covered by manufacturer.