Hello, for about 4 weeks the yellow warning light for the motor electronics has been shining at my Avensis Verso. The workshop (a Toyota workshop!) had the car already 4 full days there, and does not find the cause According to error diagnosis the error memory reports the error P0403 (or P0304 ???) – something with the injection. However, an exact component is not specified. Currently the offer has been made to me, on good luck times the control part, as well as the exhaust gas return valve? (material costs of 1,600 Euro ). I have now done some tests and come to the following results. 1. the lamp does not work at all at an outside temperature of less than 2°, even for distances of 100km not 2. at 5-10° outside temperature the lamp goes after approx. 3-5 km 3. from approx. 15° the lamp starts immediately at the start and the curious findings (which also the master cannot explain) 4. in reverse the lamp never goes on, even at 25° outside temperature 5. in the stand, full throttle until the speed barrier remains the lamp also from 6. I drive only with the clutch, completely without giving gas, the lamp also stays off, even if I only switch by grinding the clutch up to the 4th gear, and already have 30km/h on it. I then tap the accelerator pedal, and the car pulls on, the lamp is immediately there. According to Toyota workshop, mine is already the 3rd car, which shows this behavior. They have no A question at Toyota Deutschland (from the workshop) brought a list of possible parts, but they are all in order with my car (according to the research of the workshop) Does anyone have an idea what that could be? Slowly I find this really not funny anymore. Thanks for every tip