Edmunds dealer partner, Bayway Leasing, is now offering transparent lease deals via these forums. Click here to see the latest vehicles!
Options
Popular New Cars
Popular Used Sedans
Popular Used SUVs
Popular Used Pickup Trucks
Popular Used Hatchbacks
Popular Used Minivans
Popular Used Coupes
Popular Used Wagons
Comments
For code 41 I replaced the Throttle Position Sensor, for code 71 the EGR valve has been cleaned and the EGR gas temp. Sensor replaced. After replacing these parts and clearing the codes they come back within 20 miles of driving. I’m unconfused and out of ideas. Please help.
I don't know how long I have been consuming oil, I change it every 8000km and have never checked it between changes. Didn't know I had to with a Lexus and every other car I have ever owned - including some notoriously unreliable North American brands - has not burned a drop of oil.
The car was born with and used 5-30 mineral oil, I switched it to synthetic two years ago. The dealer wants me to return to mineral, as this might have exacerbated my issue. Anyway, as I get more information and time goes by with my diary, I'll repost here, but I wanted to see what was done for you.
Wayne
Let me know how your whole thing pans out, but for sure that is your problem as well. I logged my entire fix with pictures, I suggest you do the same. Once they open your engine request to inspect everything before reassembly. Make sure your cylinders are not damaged. I also use fully synthetic oil and will continue to do so.
I will pursue Lexus armed with this information and hopefully they are just as nice to me. Funny, I was thinking of updating to the new GS, it is a work of art. I guess I'll wait and see how I'm treated. I was also thinking of the Chevy Volt - FWIW, I test drove one yesterday.
Anyway, I find it very hard to justify the cost of the repair, this is an obviously poorly engineered component of the engine. I might just fix it with a jug of oil kept in the trunk.
Let me know if you have any other questions. Good luck!
Thanks!
I had a brand new Infinity I35 and it had font end vibration problems that I noticed on my ride home the night I bought it. They made it better and almost imperceivable after having an engineer look at the car and suggest some adjustments to the steering rack but it came back..... could never get rid of it and Infinity corporate said, if your not happy, lemon law the vehicle. Imagine how nice it would have ben to have them admit there was a problem and step up to do the right thing? Since then, between my wife and I, we have had 4-5 cars. No one has given us the type
of customer service we get from Lexus and oh..btw, there will never be a Nissan product in my garage again. I know they make a great product and have made many owners believe in thier autos....every manufacturer can have issues. But the best step up and take ownership of their problems! Thank you Lexus.
Researched the net and tried a few diagnoses:
1. The Mass Airflow Sensor was suspect but was electrically measured fine. There was a leak at the intake air filter, causing a collection of dust on the MAF sensor filament. Cleaned that out with electric contact cleaner. Did not solve the problem. Still code P0171.
2. Checked air leaks on intake vacuum lines by blowing cigarette smoke into the air intake and ran engine. No leaks found
3. Checked all oxygen sensors. All were fine.
4. Check gas tank, gas cap leaks, fuel lines... all looked OK.
Could not find the cause of P0171, system too lean. Lexus dealer suggested contaminated fuel system causing lean mixture. They proposed replacing fuel pump, fuel filter, 6 fuel injectors, flushing and cleaning fuel system, total about $3700. I rejected their stupid and greedy proposal.
The engine is running with hesitation during acceleration, so MAF sensor may have been damaged by dust corroding the sensor filament. I swapped the $220 MAF sensor from another car. P0171 code was cleared. Car passed smog test.
The MAF sensor looked and measured OK but the dust may have corroded and altered the heating and current profile on the heating and sensing filament, causing erroneous data being sent to the ECU.
P0171 problem solved cheap WITHOUT THE EXPENSIVE HELP by LEXUS DEALER.
The cheap knocked off MAF copies sold in eBay for $30-40 seem to work OK.
I think "normal" has to be viewed in relation to the age and mileage of the car.
It seems most of the misfire is from excessive build-up of carbon on the intake valves and piston rings.
Years before this bulletin we just did a top engine clean with a caustic solvent and cleaned off intake valves by removing the upper intake manifold and cleaning the valve tops.
At that time the root of the problem wasn't known.
Lexus stepped up and made a new bulletin to replace internal engine components.
Some engines may still have issues afterwards as we are seeing now.
Many if them run fine but still consume more oil than they should.
Some engines will be replaced due to the consumption because we believe that the cylinders have become uneven in wear or the cylinder walls are too smooth without enough cross hatches.
We are told not to hone cylinders because the pistons use a fitted type piston matched to each cylinder bore. Pistons are labeled type a,b,c.
I hope the next step Lexus takes fixes the problem for good. There are many upset customers over this situation.
I wish everyone good luck with the repair of their car.
That car was amazing in many ways, I loved it and so did my wife when she had chance to drive to drive it.
One week ago, she was shopping for a new used car, which she finally found and bought.
I was just intended to take another car for a test drive while she went grocery shopping.
When she got back I was doing my paper work on the 2006 Lexus GS300 AWD.
Traded in the 2008 Avalon with 115k miles towards 2006 GS300 with 63k miles. This GS only with one previous local owner. Pristine in shape and has all bells and whistles.
It even has regulated heat/cooling in the back seats!
Sound system came with 14 speaker original badge.
Price tag: 22000 from dealer with two years warranty.
First long trip a 250 miles round trip used just a little more than half the tank!
I am impressed by the mileage. I am averaging 27mpg city/highway driving.
No leakages, and so silent.
My only complaint: Why isn't there any Aux in for other units?
Any ideas regarding sound and other units attached?
Grateful for any inputs.
Happy GS300AWD owner
I read in this forum someone GS leaks 1 quart oil every 1,000 miles and Lexus stull claims that's normal engine operation.