Mechanics

LEXUS GS 300 SENSOR PROBLEM

2001 Lexus GS 300

Computer problem
2001 Lexus GS 300 6 cyl Two Wheel Drive Automatic 92000 miles

check engine lite on, codes 0171,0172, come uo, lean fuel at O2 sensor banks 1, 2, checked for air leaks at intake, none, repaced the coolant temp. Sensor, al with no resolve. Went to highest octaine fuel codes come back, any suggestions?
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Bobn60
January 28, 2008.



I'm curious as to why the coolant temp sensor was replaced?

Assuming there are no vacuum or air leaks, i'd go with an airflow meter. Common on yotas

Tiny
Lostinmars
Jan 28, 2008.