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2003 Lexus ES300 162,000 miles and P0420 code. P0420. No
P0420. No reset attempted but I can try that later today. … read more
Ron Z.
Ron Z.
- Lexus Tech -
Vocational, Technical or Trade Scho
454 satisfied customers
The vsc Trac, Vsc off and check engine light comes on
The vsc Trac, Vsc off and check engine light comes on intermittently on my 2004 gx470. Had it checked and was told it was told it was the catelytic converter. Also, tire pressure light won't go off ev… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
1,848 satisfied customers
I have a misfire on cylinder 1-3-&5 these codes are showing
I have a misfire on cylinder 1-3-&5 these codes are showing up 1349vvt system malfunction,p0420 catalyst system efficiency Below threshold (Bank 1),p0440 evaporative emisson system, p0441EES incorrect… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
We have a Lexus ES300 2000 model year. The check engine
Hi We have a Lexus ES300 2000 model year. The check engine light came on and the dealer looked into it said that the last converter needed to be replaced, and suggested a local mechanic could change t… read more
Toyota Service
Toyota Service
Toyota Dealership Service & CR Manager
1,344 satisfied customers
I own a Lexus GX470 and am having an issue with 02 sensors.
I own a Lexus GX470 and am having an issue with 02 sensors. I keep getting code 0420 for bank 1 secondary sensor. I have replaced both bank 1 and bank 2 sensors and am getting the same error code for … read more
George H.
George H.
ASE Certified Technician
Associate Degree
224 satisfied customers
Lexus ES300: While driving cross country, the check engine
While driving cross country, the check engine light came on. In Abilene TX, the codes were P0128, P0430 and P0420. Finally got it to a Lexus dealer in El Paso, who reported codes P0128 and P0420. He s… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
Lexus RX300: Lexus traced my fault codes today & said it related
Lexus traced my fault codes today & said it related to a rear bank pre cat being defective. Apparently there are two on my 2005 rx300 but I don't know which one to replace. The codes showing po420 & p… read more
Rob
Rob
mechanic/mot tester
Vocational, Technical or Trade Scho
82 satisfied customers
My 1998 Lexus GS300 had the Trouble light turn on tonight while
My 1998 Lexus GS300 had the Trouble light turn on tonight while I was driving on a 45 mph highway. When I got home I read the Code with my scanner and it only had one code P0420. I erased the code and… read more
Toyota Service
Toyota Service
Toyota Dealership Service & CR Manager
1,344 satisfied customers
Lexus GX470: I HAVE A 2005 GX470 AND I HAVE 120000MILES ON
I HAVE A 2005 GX470 AND I HAVE 120000MILES ON IT AND I HAD THE CK ENGINE LIGHT COME ON WITH TRAC LIGHT AND TCS LIGHT AND ITS A P0420 CODE. WHAT IS THE PROBLEM? HOW DO I FIX IT?… read more
Ron Z.
Ron Z.
- Lexus Tech -
Vocational, Technical or Trade Scho
454 satisfied customers
I received a P0420. We replaced the catalyst converter, Bank
I received a P0420. We replaced the catalyst converter, Bank 1 VVT, Bank 2 VVT, Camshaft Timing Oil Control Value, and other parts that were necessary to replaced. I have no check engine light on. Sti… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
1,848 satisfied customers
2005 gx470: im going to change the oxygen sensors..two front ones
I have a 2005 gx470 and I'm going to change the oxygen sensors in the front. My friends computer said the two front ones are out. Where are they located??… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
1,848 satisfied customers
1999 es300: driven..check engine light and the TRAC..local autozone
I just purchased a 1999 es300 Coach from a small dealer and within the first 50 miles driven, the check engine light and the TRAC off light are light. I had the local Autozone check the error code and… read more
Ron Z.
Ron Z.
- Lexus Tech -
Vocational, Technical or Trade Scho
454 satisfied customers
PO..bank one on the drivers side or the passenger side
I am working on a 2004 GX 470. I am getting a PO 420 My questions are: 1. Is bank one on the drivers side or the passenger side of the vehicle? 2. Would you recommend changing the o2 sensor and waitin… read more
Genchi Genbutsu
Genchi Genbutsu
Vocational, Technical or Trade Scho
3,526 satisfied customers
95 Ls400: fuel system..malfunction..white smoke at start..awhile
I have a 95 Ls400, with a code P-0420, ignition system and fuel system malfunction. It also recently started emitting white smoke at start up, but only after sitting awhile. What are the possible caus… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
1,848 satisfied customers
2003 LS430: pa emissions test..using a lower octane fuel than premium.
I was told that i failed the pa emissions test for a 2003 LS430 with 120000 miles. I have been using a lower octane fuel than premium. Will this cause the failure? What else could be the problem other… read more
BigBob
BigBob
Service Manager
High School or GED
2,846 satisfied customers
1999 Lexus: tires..gas cap..The check engine & VSC lights are on
I drive a 1999 Lexus ES 300. The tires are reletively new, the gas cap was replaced. The check engine & VSC lights are on. I was recently at the dealer and they told me that the battery terminals were… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
1,848 satisfied customers
Lexus sc430: they replaced catalytic converters and the light is
i have lexus sc430, about 5 months ago i got code p0420b (catalytic effieicency) bank 1 code, i go to an indenpendent shop i use for tha last 15 years. they replaced catalytic converters and the light… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
1,848 satisfied customers
Lexus: check engine light recently i checked with mechanics..converter
hi i have lexus es 300 year 1999 and i got check engine light recently i checked with mechanics he said that we need to replace catalyic converter where we can catalyic converter… read more
lexpert
lexpert
Lexus Master tech
Vocational, Technical or Trade Scho
2,100 satisfied customers
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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

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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.

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