2000 es300 p171 code
#1
Driver School Candidate
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2000 es300 p171 code
i got a check engine light for p171 system too lean bank 1, i get two of those codes everytime it gets triggered, i reset it everday hoping it woudl go away, what shoudl i check for, car drives fine i was told it could bea vacuum leak maybe im wrong, but two of the same code is funny, anyways lemme know wat u guys think
#2
Possible causes
Air intake hose loose, Fuel line pressure low , Fuel injector leak or blockage, Heated oxygen sensor malfunction, Mass Airflow Meter (MAF), Engine coolant temperature sensor.
The most common cause is the MAF
Clean the MAF sensor; it's located right behind the air filter housing. Use an electrical/electronic spray cleaner. Clean the inside and outside sensors on the unit. The sensor will have to be removed from the housing/intake plenum.
Air intake hose loose, Fuel line pressure low , Fuel injector leak or blockage, Heated oxygen sensor malfunction, Mass Airflow Meter (MAF), Engine coolant temperature sensor.
The most common cause is the MAF
Clean the MAF sensor; it's located right behind the air filter housing. Use an electrical/electronic spray cleaner. Clean the inside and outside sensors on the unit. The sensor will have to be removed from the housing/intake plenum.
#3
Lexus Test Driver
Join Date: Jan 2005
Location: Massachusetts
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Please check here as i just wnet through this CEL code. It's most likely the Mass Air Flow meter. https://www.clublexus.com/forums/sho...&highlight=cel Hope this helps.
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