I had this code on my 2012 Yaris. Apparently is means "Start Ability Malfuction" and means that the engine has cranked without starting (at least once)
p1604 / start ability malfunction and some time it comes with p1605 rough idling or knock this is caused by ECM or ECU
The 2010 Toyota Yaris has 16 valves.
The 2010 Toyota Yaris has a 5-speed manual.
The 2010 Toyota Yaris has an inline 4 engine.
The 2010 Toyota Yaris has double overhead cam (DOHC).
The 2010 Toyota Yaris is a gas-powered vehicle.
The 2010 Toyota Yaris's turning circle is 30.8 ft..
The curb weight of the 2010 Toyota Yaris is 2320 lbs..
The 2010 Toyota Yaris runs on regular unleaded.
The 2010 Toyota Yaris has a drag coefficient of 0.29 Cd.
The 2010 Toyota Yaris is 12 ft. 6.6 in. (150.6 in.) long.
The height of the 2010 Toyota Yaris is 5 ft. 0 in. (60 in.).