Lexus

Lexus Troubleshooting Questions? Ask a Lexus Expert

Ask an Expert,
Get an Answer ASAP!

Lexus

99 RX300: overdrive..warmed..2000 rpm until car gets..knock sensor

Customer Question
My '99 RX300 won't shift...
My '99 RX300 won't shift into overdrive once the car is totally warmed up. Also, occasionally (but infrequently# XXXXX will start off in overdrive #engine running around 2000 rpm until car gets up to 40+#. The only trouble code showing on the computer is related to the knock sensor. The car has about 180,000 miles. It has had recent engine work #including timing belt) and is running superbly.
Submitted: 6 years ago.Category: Lexus
Show More
Show Less
Ask Your Own Lexus Question
Answered in 39 minutes by:
3/2/2011
Lexus Mechanic: lexpert, Lexus Master tech replied 6 years ago
lexpert
lexpert, Lexus Master tech
Category: Lexus
Satisfied Customers: 9,974
Experience: Master Certified with lexus, 8 years experience with Lexus
Verified

Hello and thank you for using just answer!

Can you give me the exact code # XXXXX

Ask Your Own Lexus Question
Customer reply replied 6 years ago
I will have to get the code # XXXXX my mechanic here. I called and left a message. I'll send it as soon as I here from him.

For some clarification, the starting off in overdrive is a new symptom, since the last time the mechanic looked at the car. This morning, I left work to do some errands, and the car started off as usual (1st, 2nd, 3rd gear, but not into overdrive). Then at first stop light, car started off in overdrive, engine speed right up to 2000 rpm, until car was going 40+, then engine speed change with car speed, as normal. Car stayed in overdrive until next slow/stop, and continued to behave the same the next few times I started up (reverse functions normally all the time).
Then all of a sudden, operation reverted to the more normal of going through 1st, 2nd, and 3rd gears, but not into overdrive.
Again, I'll send the trouble code # XXXXX soon as I get it from the mechanic.
Lexus Mechanic: lexpert, Lexus Master tech replied 6 years ago
thanks!
Ask Your Own Lexus Question
Customer reply replied 6 years ago
I talked to the mechanic, and as best he can recall from records and memory (it's been 2+ months since he ran the diagnostics), the code was P0330. He apologized that his notation was not as clear as he'd like, and said if P0330 didn't "compute," it could have been P0335.

I hope this helps.

Thanks,
Harvey Knuth

Lexus Mechanic: lexpert, Lexus Master tech replied 6 years ago
I'm sorry but if he did not properly notate the code then he is going to have to plug a scan tool into it and recheck it. We need to be sure that we are 100% sure on ALL and exact codes to be sure that I properly analyze and advise on this issue. Thank you.
Ask Your Own Lexus Question
Customer reply replied 6 years ago
I'll see what I can do. It'll at least be several days...next week sometime.
Lexus Mechanic: lexpert, Lexus Master tech replied 6 years ago
ok
Ask Your Own Lexus Question
Customer reply replied 6 years ago
Good morning,
I finally was able to get my car back into the mechanic, and he confirmed the trouble code is P0330.
Also, although the issue of starting off in overdrive still happens, it is too infrequent to pin down anything directly related to it. However, I believe if the car is stopped and shifted into reverse, and then back into drive, the transmission returns to its current normal functioning...1st, 2nd, 3rd, but no overdrive (this has worked on at least two occasions).
Thank you,
Harvey
Lexus Mechanic: lexpert, Lexus Master tech replied 6 years ago
Ok thank you! You do indeed need new knock sensors then and the subharness thatconnects to them commonly falls apartwhen you change them so plan on replacing those as well.
lexpert
lexpert, Lexus Master tech
Category: Lexus
Satisfied Customers: 9,974
Experience: Master Certified with lexus, 8 years experience with Lexus
Verified
lexpert and 87 other Lexus Specialists are ready to help you
Ask your own question now
Customer reply replied 6 years ago
OK, a follow-up question: I presume the need to replace the knock sensors is based primarily on the code P0330. However, is this in any way related to my transmission issue of not shifting properly (not going into overdrive once the engine is warmed up, or, occasionally, starting out in overdrive)?
Lexus Mechanic: lexpert, Lexus Master tech replied 6 years ago
I outlined this already, the knock sensors cause the transmission issue, there is NOT a problem with the transmission. Get those sensors replaced.
Ask Your Own Lexus Question
Customer reply replied 6 years ago
Thank you for confirming that. However, I re-read all of your responses, and I can not find anything addressing the transmission issue. All I see is your request for the specific trouble code(s).
It would be helpful to have an explanation of how the (malfunctioning) knock sensors cause the transmission issue.
Thank you.
Lexus Mechanic: lexpert, Lexus Master tech replied 6 years ago
sorry for delay. When a knock sensor malfunction is detected the computer goes into limp mode and causes the transmission to shift funny and to lockout overdrive, in other words it shuts down operation. Fix the knock sensors to fix that other issue as well Cool
Ask Your Own Lexus Question
Customer reply replied 6 years ago
Thanks very much.
Ask lexpert Your Own Question
lexpert
lexpert
lexpert, Lexus Master tech
Category: Lexus
Satisfied Customers: 9,974
9,974 Satisfied Customers
Experience: Master Certified with lexus, 8 years experience with Lexus

lexpert is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

THANK YOU, THANK YOU, THANK YOU!! I've got my baby back. Tomorrow I will get a tank of high octane, remove the top, go for a long long ride and enjoy my car. THANK YOU!

JugheadUSA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

lexpert

lexpert

Lexus Master tech

9,974 satisfied customers

Master Certified with lexus, 8 years experience with Lexus

Skyvisions

Skyvisions

ASE Certified Technician

1,760 satisfied customers

Lexus Expert

Ron Z.

Ron Z.

- Lexus Tech -

430 satisfied customers

18+yrs experience. State Inspector and Lexus Diagnostics

Chris (aka - Moose)

Chris (aka - Moose)

Technician

310 satisfied customers

16 years of experience

AMD

AMD

Master Technician

270 satisfied customers

L1 Advanced Level Diagnostics Specialist

George H.

George H.

ASE Certified Technician

220 satisfied customers

15+ years ASE Master w/L1 Drivability certification

Tim Mohr

Tim Mohr

ASE MASTER

126 satisfied customers

30 YEARS EXPERIENCE, FORIEGN AND DOMESTIC, GAS AND DIESEL

< Previous | Next >

Related Lexus Questions
I have a Lexus LX470 1999 it wont start and a couple hours
I have a Lexus LX470 1999 it wont start and a couple hours later it will start. Also its stalls while driving and then it will restart … read more
eurotec
eurotec
Vice President / Manager
Associate Degree
11 satisfied customers
2015 lexus is350 can get it to crank.it was flooded.key was
2015 lexus is350 can get it to crank.it was flooded.key was proramed and beeps but locks do not work. can any body giveme any idea please? thanks. … read more
Peter Bagley
Peter Bagley
master technition
Vocational, Technical or Trade School
1,010 satisfied customers
I have 01 lexus is 300. The trac off light came on bout a
Hello. I have 01 lexus is 300. The trac off light came on bout a week ago , ever since it's been stalling on me. Now keep in mind I didn't turn the trac off because I don't know how lol … read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
1999 LS 400 speedometer indicates about 25 miles per hour
1999 LS 400 speedometer indicates about 25 miles per hour low. … read more
roy
roy
Associate Degree
3 satisfied customers
Back up camera stopped working. With vehicle. Rx400h 2006. I
I am trying to fix myself. wiggled connections in boot space … read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
1992 lexus es300, I removed instrument cluster for repair,
1992 lexus es300, I removed instrument cluster for repair, without first disconnecting battery terminal wires. ( which I now know I should have done) With instrument cluster reinstalled air bag lite i… read more
Toyota Service
Toyota Service
Toyota Dealership Service & CR Manager
1,344 satisfied customers
I have a 1998 Lexus LS400. Intermittently the VSC light off
I have a 1998 Lexus LS400. Intermittently the VSC light off light comes on. When it does I have a complete loss of power to the vehicle. I have to mash the Excelerator all the way to the floor just to… read more
Toyota Service
Toyota Service
Toyota Dealership Service & CR Manager
1,344 satisfied customers
Same, Cd is bot workinc. Lexus 2008 80000 miles LS 460
Lexus 2008 80000 miles LS 460 Mark Levinson, does it have solution? … read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
I have a 2006 Lexus IS 250. All power, but push to start and
Hi i have a 2006 Lexus IS 250. All power, but push to start and the car won't start. Please help!… read more
Peter Bagley
Peter Bagley
master technition
Vocational, Technical or Trade School
1,010 satisfied customers
I have lexus rx330 2004. my key stuck in ignition. I can
I have lexus rx330 2004 . my key stuck in ignition … read more
Mechanic01
Mechanic01
1,645 satisfied customers
2008 Lexus 460LS quit running while driving. Will start
2008 Lexus 460LS quit running while driving. Will start again but will quit after a minute or two. … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,388 satisfied customers
2009 gs 350 with no audio. Fuses are good. It if I could
2009 gs 350 with no audio. Fuses are good. It if I could find an audio wiring diagram I'm sure I can diagnose the problem. Can you tell me where I can a wiring diagram. … read more
Toyota Service
Toyota Service
Toyota Dealership Service & CR Manager
1,344 satisfied customers
Bar fuse is by the battery on my 2006 lexus is 350...I think
bar fuse is blown by the battery on my 2006 lexus is 350...I think I need a special tool... … read more
Chris (aka - Moose)
Chris (aka - Moose)
Technician
Vocational, Technical or Trade School
310 satisfied customers
I have a lexus 450h. 2010 lexus rx 450h. Nothing yet,
Nothing yet, rarely, but, twice now when I cut the car on it won't go in drive … read more
Chris (aka - Moose)
Chris (aka - Moose)
Technician
Vocational, Technical or Trade School
310 satisfied customers
My hybrid runs but only gets up to 70 mph loses power and
my hybrid runs but only gets up to 70 mph loses power and the check engine light and check hybrid system warning is on … read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
Catalytic caught fire 2008 RX 350. Its at dealer. Battery
Battery light came on 4 miles from home midnight in 12 degree weather. Started to lose electronics, car started bucking, cat was on fire in driveway, put fire out with extinguisher … read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
Check engine light is flashing. I'm thinking it's a coil bit
Check engine light is flashing. I'm thinking it's a coil bit wondering if I drive it if it's gonna leave me on side of road. My mechanic is out until Tuesday & I have business this weekend. Thank yoj … read more
Mechanic01
Mechanic01
1,645 satisfied customers
I have a 2000 GS300 and the past couple of days I would go
I have a 2000 GS300 and the past couple of days I would go outside and all my windows are down in the morning and my sunroof open what causes that … read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x