Last post on May 26, 2013 at 9:14 AM
You are in the Toyota Highlander
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Toyota Highlander, SUV
#5 of 116 2002 Highlander - codes P0125 and P0136 (CEL and VSC lights)
Mar 16, 2007 (3:56 pm)
Two months ago I had the exact same issue as the original poster.
Fast forward to today.....
Having brought my 2002 Toyota V6 AWD with 140,000 miles to my Toyota dealership to check out a simultaneous check engine light and vehicle stability control light, I learned that I would need an oxygen sensor replaced which would cost about $400.
I passed on this repair - especially considering I'm looking at possibly not having this vehicle a year from now.
The two diagnostic codes received from an OBDII scan tool were:
P0125 (Insufficient Coolant Temperature For Closed Loop Fuel Control)
P0136 (Oxygen Sensor Circuit Malfunction - Bank #1 Sensor #2)
Any ideas on what short and long term issues I might have not replacing this oxygen sensor?
#6 of 116 Re: 2002 Highlander - codes P0125 and P0136 (CEL and VSC lights) [budh]
Mar 17, 2007 (1:28 pm)
I had to have my Oxygen sensor replaced on my 2001 V6 AWD at 55k miles. If you dont replace it, you risk engine stall at red light and other rapid changes in fuel/oxygen mix such as decelerating off a highway ramp etc
#7 of 116 Re: 2002 Highlander - codes P0125 and P0136 (CEL and VSC lights) [budh]
Mar 20, 2007 (4:59 am)
Please remember, that the feedback from the O2 sensor will impact your programmed combustion pattern. It could happen that under normal driving conditions the computer can "balance" the faulty (lack of) signal, but under a slow-down or up-hill acceleration it could shut-off the engine. If I were in your situation, I would replace it and drive it for an other 50,000 miles. You have a reliable V-6 AWD SUV - don't give it up so easily! =Andrew
#8 of 116 Check engine light
Apr 01, 2007 (8:51 am)
2003 HL V6 28,000 miles:40 miles into a trip the "check engine light" came on, I turned around and came home. HL ran great all the way home. Today is sunday and the dealership's service is closed. Any ideas would be appreciated. Thanks.
#9 of 116 Re: Check engine light [jackmick656]
Apr 01, 2007 (9:25 am)
The check engine light can come on for hundreds of reasons. The first thing to check is whether your gas cap is tight!!! But you can drive for weeks with it on, months perhaps and it won't do you any harm. Just make an appointment to stop in and see what caused the issue. Don't change your life.
#10 of 116 Re: Check engine light [jackmick656]
Apr 01, 2007 (11:21 am)
Agree with kdhspider - also, has it been 4,500 to 5,000 miles since your last oil change? Could be the reminder.
#11 of 116 Re: Check engine light [gasman1]
Apr 01, 2007 (12:49 pm)
Thanks for the reply, only 2800 mi since last oil change. Since I read reply from kdhspider I re tightened fuel cap, checked and pushed air filter vacuum hose as far as it would go on. After that I disconnected both battery cables and restarted the HL. CEL went off. Took HL for a 40 mile drive and CEL stayed off. Thanks a lot for both of your help.
#12 of 116 Re: Check engine light [jackmick656]
Apr 01, 2007 (12:57 pm)
Another thought, yesterday I gassed up and when the hand nozzle clicked off I tried to squeeze in a few more drops. I know that's a no no and maybe caused the problem.
#14 of 116 Re: Highlander Check engine light [derekgaddy]
Apr 02, 2007 (12:10 pm)
My HL is a 2003 v6 2wd.