Engine light on
#1
Driver School Candidate
Thread Starter
Join Date: Dec 2006
Location: Ky.
Posts: 46
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Engine on then off,then on and stays on. I took a reading with the code reader and it said PO171 System too LEAN (BANK 1). COULD IT BE A FUEL SENSORor the Spark plugs. The car has plenty of power.
#2
Super Moderator
![](https://www.clublexus.com/forums/images/ranks/rank-smod2.gif)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
MAF sensor is a possibility. A/F sensor would normally be the the case if accompanied by another code. P0171 is the most common type error on RX300s as far as cels, see this recent thread, https://www.clublexus.com/forums/sho...d.php?t=290791
Most of the time the sensors just detect a brief condition out of its ratios and it pops the light. That thread above indicates how to check the MAF and also resetting the light. Gas cap not tightened enough and a disconnected air hose to the back of the air box can also be a possibility.
Most of the time the sensors just detect a brief condition out of its ratios and it pops the light. That thread above indicates how to check the MAF and also resetting the light. Gas cap not tightened enough and a disconnected air hose to the back of the air box can also be a possibility.
#4
Lexus Champion
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I'd merge both of your threads into one. They're the same questions and the same problems.
You got a bad MAF or Mass Air flow meter. Lexmex already did the search for you and post the link.
You got a bad MAF or Mass Air flow meter. Lexmex already did the search for you and post the link.
Thread
Thread Starter
Forum
Replies
Last Post
GS300noob
GS - 2nd Gen (1998-2005)
8
04-06-12 11:51 AM