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Sedans Lexus ES 99 ES 300 Won't shift into OD - Ever
15 messages, Last post on Oct 17, 2008 at 11:52 AM
You are in the Lexus ES Forum. Your Hosts are pat & karens
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Replying to: dsmcasey (Jul 10, 2008 9:22 am) |
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Replying to: dsmcasey (Jul 10, 2008 9:22 am)
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Replying to: pgood (Oct 14, 2008 1:06 pm) You can test the above theories by filling with 92 octane, disconnecting the battery to erase the previous "learned" parameters and see if the ECU will then use, or attempt to use OD. If the clutch is failing the ECU will soon stop using OD again. If the engine is degraded the ECU may use OD again until you switch back to regular. You might also want to look into the possibility that the engine is degraded due to a clogged exhaust due to catalyst structure failure. If the 99 had an ATF thermistor to prevent use of OD until the fluid was warmed up the thermistor may have failed.
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Replying to: wwest (Oct 14, 2008 1:51 pm) Let's assume that the OD problem is resolved by replacing the thermistor. I still have the CEL and Traction Control lights to deal with. I had the ECU code read...P0330 "Knock Sensor 2". I was told by the Lexus service folks that the Traction Control is frequently "shut down" by the ECU when a CEL is activated for a prolonged period of time. Is this true? What should my next steps be? I'm hesitant to take the car to the Lexus dealer again because they were not able to resolve my problems by changing out parts (rear injector bank) which cost me $1200. It seems they read the codes, then change out parts without resolving the root cause. Thank you very much for your assistance.
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Replying to: pgood (Oct 15, 2008 5:06 am) The engine/transaxle ECU WILL NOT use OD if the engine performance is KNOWN to be degraded. A knock sensor 2 code is a clear indication of degraded engine performance. And a VSC, Trac fault code is a default condition anytime there is a CEL. Fix the engine problem and the Trac code will also go off. And keep in mind that the knock sensor code may not mean the problem is with the knock sensor itself. |
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Replying to: wwest (Oct 15, 2008 7:13 am) Thanks, Casey
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Replying to: dsmcasey (Oct 15, 2008 10:23 am) Thanks, Pat
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Replying to: pgood (Oct 15, 2008 10:44 am) If the CEL returns after a few drive cycles what have you lost, 10% extra on a tank of gas...?? |
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Replying to: pgood (Oct 15, 2008 10:44 am) The knock sensors are a VERY common problem with this vehicles (and other lexus/toyota vehicles of the same year). I found the part numbers on the clublexus site by searching in the forums. There is also a post about how to change them out and it includes pictures and step by step instructions. It's not a terrible job but it does involve removing the intake manifold, which can be a pain. I got the sensors from carson toyota for less than what you are paying. Also, the WIRING is USUALLY the culprit, not the sensors. BUT, to get to the wiring you have to take off the manifold, and while you're in there you might as well replace the sensors sense there's no gaurantee that they weren't the culprit as well. Thanks, Casey |
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