05/28/2026
2019 Toyota Tundra. 4.6l
Customer concern, after driving for 30 minutes and park the car for 10 to 20 minutes it wont start. also sometimes driving on freeway it will stall. no codes aside from start ability code. he already take it to 2 toyota dealership and they cant figure it out. they replace all Injectors, and fuel pump. verified the concern. install mechanical fuel gauge and spark checker. when the issue happened fuel pressure is good. also theres a spark but not so bright. connect oscilloscopes on crank sensor while watching rpm. the power, ground and signal voltage are good on crank sensor. the crank sensor is sending square wave signal when the engine crank but the rpm is 0 or sometimes really slow. replace the pcm and fix the issue.