Lexus

Lexus troubleshooting questions? Ask a Lexus Expert

Ask an Expert,
Get an Answer ASAP!

Lexus ls 400: I have 94 ls400, had tuneup, wires, mas airflow…

Customer Question
Hi I have 94...
Hi I have 94 ls400, had tuneup, wires, mas airflow sensor, 2 rotors and new catylictic converters, trac lite stays on and car has no accerlation, why?
Submitted: 3 years ago.Category: Lexus
Show More
Show Less
Ask Your Own Lexus Question
Answered in 17 hours by:
7/8/2015
Lexus Mechanic: Toyota Service, Lexus and Toyota expert replied 3 years ago
Toyota Service
Toyota Service, Lexus and Toyota expert
Category: Lexus
Satisfied Customers: 5,239
Experience: 30 + years of experience; Multiple Award Winning Svc Mgr; Just Answer Customer's Choice Award Winner
Verified
Hello. Welcome to Just Answer. Please allow me to assist you. The TRAC light on might be a bad wheel speed sensor which is causing the TRAC to apply the brakes (that is how the TRAC system works). The acceleration issue also could be caused by a timing belt that is stretched. The recommendation I have for you on this issue woul be to have the timing belt replaced if it has not been changed in the last 60,000 miles. If the belt was recently changed, I would have the vehicle put on a Lexus scan tool where the tech can read the real time values of the wheel speed sensors. If one drops to zero while driving, the Trac will activate. Your problem is most likely a bad wheel speed sensor that is sending bad info to the ABS/TRAC system or a stretched timing belt.If you have any questions, please feel free to reply.Thanks for choosing Just Answer. It was a pleasure to assist you today. I trust my input to your request is satisfactory to you and meets your expectations. A positive rating would be greatly appreciated for my assistance on your inquiry. Thanks in advance and thank you again for choosing Just Answer
Ask Your Own Lexus Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a lexus mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Toyota Service Your Own Question
Toyota Service
Toyota Service
Toyota Service, Lexus and Toyota expert
Category: Lexus
Satisfied Customers: 5,239
5,239 Satisfied Customers
Experience: 30 + years of experience; Multiple Award Winning Svc Mgr; Just Answer Customer's Choice Award Winner

Toyota Service 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

2,100 satisfied customers

Master Certified with lexus, 8 years experience with Lexus

Skyvisions

Skyvisions

ASE Certified Technician

1,848 satisfied customers

Lexus Expert

Ron Z.

Ron Z.

- Lexus Tech -

454 satisfied customers

18+yrs experience. State Inspector and Lexus Diagnostics

Chris (aka - Moose)

Chris (aka - Moose)

Technician

345 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

224 satisfied customers

15+ years ASE Master w/L1 Drivability certification

Tim Mohr

Tim Mohr

ASE MASTER

129 satisfied customers

30 YEARS EXPERIENCE, FORIEGN AND DOMESTIC, GAS AND DIESEL

< Previous | Next >

Related Lexus Questions
Rough idle no power comes up with codes 13.24.& 31 not sure
rough idle no power comes up with codes 13.24.& 31 not sure where to start … read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
I have a 2007 lexus rx350. The check engine light, vsc and
Customer: I have a 2007 lexus rx350. The check engine light, vsc and trac off lights are on. I had the lower o2 sensor replaced due to varmits chewing the wires. This did not fix the problem. When I a… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
1,848 satisfied customers
Lexus LS 400: 91 Lexus LS400. Sending Code 13 - RPM signal
91 Lexus LS400. Sending Code 13 - RPM signal no. 2. Also the TRAC OFF light stays on. The car is slightly sluggish and feels like a misfire.Especially can tell when the car is set at 75 on the cruise … read more
Toyota Service
Toyota Service
Lexus and Toyota expert
5,239 satisfied customers
Lexus LS400: Was curious what numbers (if any) in the VIN will
Was curious what numbers (if any) in the VIN will tell me if my LS400 has traction control or not? And if not, what do I look for to determine if it has traction control? Also, what do I look for (in … read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
Lexus LS400: I have a 96 ls400 and have recently replaced both
I have a 96 ls400 and have recently replaced both cats, egr tube, mass air flow sensor, plugs, wires, both caps and rotor buttons. I keep getting misfire codes on cylinders 1 2 and 8. No timing belt j… read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
Lexus LS400: I nave a 1991 ls400 my trac light comes on and
I nave a 1991 ls400 my trac light comes on and stays on after driving about 15-20 miles it nevercomes on right after start up, I pulled wheels today to rotate when checking pads they are within 3/64 o… read more
Chris (aka - Moose)
Chris (aka - Moose)
Technician
Vocational, Technical or Trade School
345 satisfied customers
Lexus LS400: Hi, We have a 1993 Lexus LS400 that is currently
Hi, We have a 1993 Lexus LS400 that is currently only moving at 20 mph. It has been looked at and several mechanics have given suggestions, but after replacing the 2 front catalytic converters and "bl… read more
HondaPlatinum
HondaPlatinum
High School or GED
148 satisfied customers
1992 LEXUS LS400: TRAC..26 HAS SLOW ACCELERATION..CATALYTIC CONVERTER
I HAVE A 1992 LEXUS LS400 IS GIVING ME ENGINE CODE 47 AND TRAC CODES 51 AND 26 HAS SLOW ACCELERATION AND CATALYTIC CONVERTER GETS SUPER RED HOT WHAT DO I NEED TO DO TO FIX THIS… read more
lexpert
lexpert
Lexus Master tech
Vocational, Technical or Trade Scho
2,100 satisfied customers
94 LS400: jerking..I replaced plugs, wires and had the ecu rebuilt.
I have a 94 LS400 . I have what seems to be a jerking in the transmission . I replaced plugs, wires and had the ECU rebuilt. It corrected the worst of my problems but still the car would intermittantl… read more
LexusPro
LexusPro
Master Lexus Technician
1,031 satisfied customers
Lexus: slow..pickup..I step the peddle to the floor & it takes..20 mph
I have a Lexus ls400...my problem slow pickup I step the peddle to the floor & it takes about8 to 10 sec. To get to 20 mph what should I be checkking ?… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
1,848 satisfied customers
94 Lexus LS400: bad smell after idling for 5 minutes..rpm..O2 sensors
Hello, my 94 Lexus LS400 has bad smell after idling for 5 minutes, my eyes sting, at first the idling was normal @ about 700 rpm but after 5 minutes or so, the rpm starts to come down to almost 0, are… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
1,848 satisfied customers
replace 2 co2 SENSORS AND the catylytic CONVERTER...comming..too lean
I just replace 2 cO2 SENSORS AND THE CATYLYTIC CONVERTER. Just to find out the light is still on and there are 2 codes still comming up saying that the car is running too lean. I say to myself WTF. I … read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
92 ls400: doing 80 on downhill mtn rd midnite in rain...uphill passes
92 ls400. doing 80 on downhill mtn rd midnite in rain. arse coning uphill passes slowboats. rubs me off rd to the right on two lane blacktop. shoulder was gravel. once again darkstar and her companion… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
1,848 satisfied customers
1991 Lexus LS400: the Trac light came on--and stays..Check engine
I have a 1991 Lexus LS400. About 3 days ago the " Trac " light came on--and stays on. The strange thing is that the " Check engine " light is not on. Any ideas would be helpful.… read more
lexpert
lexpert
Lexus Master tech
Vocational, Technical or Trade Scho
2,100 satisfied customers
94 ls400: Hey Peter, sorry about the mix..catalytic converters..rev.
Hey Peter, sorry about the mix up. 94 ls400, both catalytic converters are glowing. The car seems like it wants to rev. and it has little power when its in gear. checked the cam sensors and rpld the r… read more
lexpert
lexpert
Lexus Master tech
Vocational, Technical or Trade Scho
2,100 satisfied customers
92 lexus: check engine light..65 mph rpms will be..rpm..crank sensor
I have a 92 lexus LS 400, check engine light and the trac off light comes on and car bucks above 65 mph rpms will be in the 2 to 3 thousand range and when the car bucks, the tac will swing several hun… read more
lexpert
lexpert
Lexus Master tech
Vocational, Technical or Trade Scho
2,100 satisfied customers
1990 LS400: drive belt..start car..RPM drops below 1000, CEL and Trac/
1990 LS400, replaced broken drive belt, got CEL and Trac/off lights when started, code 13 - RPM signal. If start car and keep RPM above 1000, no CEL, as soon as RPM drops below 1000, CEL and Trac/off.… read more
lexpert
lexpert
Lexus Master tech
Vocational, Technical or Trade Scho
2,100 satisfied customers
90 LS400: light stays..mile..obd..sound coming from the engine bay
I have Lexus '90 LS400, trac light stays on after driving about 2 mile or so. OBD trac shows code 19 It is also got humming sound coming from the engine bay (?) everytime I started the car or when I p… read more
Bob
Bob
Vocational, Technical or Trade Scho
62 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