Loss of power
#1
Driver School Candidate
Thread Starter
Loss of power
2009 LS460 I have had my car at the dealer a few times for loss of power on acceleration. The last visit which lasted three weeks finally gave a diagnoses. The problem was confirmed by the dealer and the factory reps, a knock sensor picks up a signal that retards the timing resulting in no power, I was nearly run over by a semi the last time it happened. They tried to give me my car back on 7/24/14 with the knowledge that the problem is not fixable at this time but I should drive the car and they will tell me when there is a fix. I left the car at the dealer. I was also told that they had a few others with the same problem that could not be fixed.
Oh yes, the visit before this the top of the engine was replaced at a cost of$11,500, good thing for warranties.
Oh yes, the visit before this the top of the engine was replaced at a cost of$11,500, good thing for warranties.
Last edited by qpman; 07-26-14 at 12:22 PM. Reason: add model
#2
I hope they are giving you a loaner while they resolve this for you.
I'm wondering if the problem is a result of the previous work they did on the car.
I'm wondering if the problem is a result of the previous work they did on the car.
#5
Lexus Fanatic
Lets hope this gets resolved through recall. I have this problem ocassionally but not in the last few months. Last time was right after an oil change which seems common here.
#6
I was having this same issue. And I changed to using BP premium gas and for the last 1500 miles my knock sensors have not caused any retardation of time. Previously I was using Shell Premium.
#7
Lead Lap
iTrader: (2)
You could try adding some octane booster to your gas as an experiment. Also, try BP premium gas as it is 93 octane (may gas stations in my area only have 91 octane premium). Stalling in traffic is a defect of particular interest to the NHTSA (there have been numerous recalls because of this). You might want to mention to your dealer that you read this on the NHTSA website!
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#8
Driver School Candidate
Thread Starter
Loss of power
Thanks for the input but as the dealer explained it is caused by the oiling system which causes 2 lifters to get noisy, I believe 1 and 3. The noise is picked up by the knock sensor and then sends the signal to retard the timing causing a loss of power. If you are having problems I would report it to the dealer and be persistent so you can get ahead of this.
#11
Thanks for the input but as the dealer explained it is caused by the oiling system which causes 2 lifters to get noisy, I believe 1 and 3. The noise is picked up by the knock sensor and then sends the signal to retard the timing causing a loss of power. If you are having problems I would report it to the dealer and be persistent so you can get ahead of this.
I have suggested several times that owners who are having this issue should enter a complaint at the NHTSA site but only a few have followed through.
Here are links to a few of the many threads that make reference to this issue:
https://www.clublexus.com/forums/ls4...-07-ls460.html
https://www.clublexus.com/forums/ls4...-problems.html
https://www.clublexus.com/forums/ls4...il-change.html
Last edited by jmcraney; 07-28-14 at 06:34 AM.
#12
Lexus Fanatic
It's NOT the fuel. Top-tier or otherwise. This is a known issue as explained by qpman.and jmmcraney. There is one member that had the repair done , but under warranty. If it were to be done on your own dime, it would be an astounding $ amount. Somewhere in the 10 thousand range if I recall correctly.
#13
2009 LS460 I have had my car at the dealer a few times for loss of power on acceleration. The last visit which lasted three weeks finally gave a diagnoses. The problem was confirmed by the dealer and the factory reps, a knock sensor picks up a signal that retards the timing resulting in no power, I was nearly run over by a semi the last time it happened. They tried to give me my car back on 7/24/14 with the knowledge that the problem is not fixable at this time but I should drive the car and they will tell me when there is a fix. I left the car at the dealer. I was also told that they had a few others with the same problem that could not be fixed.
Oh yes, the visit before this the top of the engine was replaced at a cost of$11,500, good thing for warranties.
Oh yes, the visit before this the top of the engine was replaced at a cost of$11,500, good thing for warranties.
Last edited by Pamperme; 07-28-14 at 06:37 PM.