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Toyota Highlander Check Engine Light

77 messages,  Last post on Nov 05, 2009 at 8:22 PM

You are in the Toyota Highlander Forum. Your Hosts are steve_ & tidester

What is this discussion about? Toyota Highlander, SUV


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#1 of 77
Highlander Check engine light by kenabr
Jan 05, 2007 (3:06 pm)
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My check engine light came on at 102,000 miles.
The dealer service dept. says that the diagnostic showed no clear cause(?)but I need new spark plugs ($240),ejectors cleaned, and of course the cost of the diagnostic ($130) The total was around $475. Am I being ripped?? My big question is what will they do to get the light out?? Should I disconnect the battery abnd reset the clock and radio buttons to see if it goes out? Then I can worry again if it comes back on.
#2 of 77
Re: Highlander Check engine light [kenabr] by derekgaddy
Jan 05, 2007 (8:34 pm)
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Replying to: kenabr (Jan 05, 2007 3:06 pm)

What year is your Highlander and is it AWD?
#3 of 77
Re: Highlander Check engine light [derekgaddy] by kenabr
Jan 05, 2007 (10:29 pm)
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Replying to: derekgaddy (Jan 05, 2007 8:34 pm)

My Highlander is a 2002 V6 AWD.
#4 of 77
engine light by prnd350
Feb 20, 2007 (11:07 am)
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I had the same problem on my 4 cylinder TH. After about 6 months, the check engine light would come on, typically after either a gas fill-up or if I made a sharp sudden turn. To get it off I had to open up the gas cap, blow on it once, re-close, and after 3-4 startups it would go away. Eventually I had it in for service one day and they said a diagnostic setting was malfunctioning, and they replaced it for free.
 
net net, try the gas cap for now; ask your dealer next time you are in for service.
#5 of 77
2002 Highlander - codes P0125 and P0136 (CEL and VSC lights) by budh
Mar 16, 2007 (3:56 pm)
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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)
 
and
 
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?
 
Bud H
#6 of 77
Re: 2002 Highlander - codes P0125 and P0136 (CEL and VSC lights) [budh] by mcm
Mar 17, 2007 (1:28 pm)
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Replying to: budh (Mar 16, 2007 3:56 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 77
Re: 2002 Highlander - codes P0125 and P0136 (CEL and VSC lights) [budh] by andrew17
Mar 20, 2007 (4:59 am)
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Replying to: budh (Mar 16, 2007 3:56 pm)

Dear Budh!
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 77
Check engine light by jackmick656
Apr 01, 2007 (8:51 am)
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Replying to: andrew17 (Mar 20, 2007 4:59 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 77
Re: Check engine light [jackmick656] by kdhspyder
Apr 01, 2007 (9:25 am)
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Replying to: jackmick656 (Apr 01, 2007 8:51 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 77
Re: Check engine light [jackmick656] by gasman1
Apr 01, 2007 (11:21 am)
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Replying to: jackmick656 (Apr 01, 2007 8:51 am)

Agree with kdhspider - also, has it been 4,500 to 5,000 miles since your last oil change? Could be the reminder.

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