Emission Control problems of the 2012 Toyota Tundra

* ongoing manufacture defect / safety concern with 2012 Toyota Tundra 4. 6. Code p2440, secondary air injection. Bank one open. ---check engine / trac off lights / engine in "limp mode" * documented recurring incidents on 4-2-19 and again on 10-12-19 after costly out of pocket repair. * my 2012 Toyota Tundra 4. 6 motor double cab has experienced the air injection pump failure twice in a six month period. This failure is a safety hazard leading to loss of power and vehicle control. The first occurrence was after a 2,000 mile trip. Driving downhill the dash lights (check engine / trac off) came at highway speed and immediately vehicle power reduced as we tried to power up the next hill. We were able to avoid being run over by following vehicles by pulling off the road, and limped to the nearest mechanic shop. Contacted 3 dealers and Toyota corporate with no positive outcome. All parties acknowledge the ongoing defect but will not pay or offer a solution to end the problem. Paid out of pocket for expensive repair. The 2nd occurrence six months later found us again unable to reach or maintain safe highway speeds. Avoid dangerous highway situations, or ability to climb hills. Both instances occurred without warning. * this emission control defect that Toyota has known about since the 2007 models. They even extended the warranty through the 2011 model year. Toyota also claims the problem is neither drive-train nor emissions related. After many attempts at the dealer and corporate level, Toyota refuses to extend repairs for this well documented defect beyond the 2011 model. Toyota suggests that when enough complaints are recorded, they will extend the warranty on newer models. The lack of support from dealers and corporate Toyota is alarming. The repair out of pocket is expensive (from $500 for a temporary repair to $4000 for a replacement from the dealer. ).