How can I find the location of bad sensors, i have code po171 on a 2000 lexus ls400

Question

also if anyone knows of a web page that I can view a how to video that would be great!

Answer 1

it might not exactly be a sensor, check the

Possible causes

- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection