Lexus

Lexus troubleshooting questions? Ask a Lexus Expert

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

Woke up today with two codes PO031 and P0031on a 2013 Lexus…

Woke up today with...

Woke up today with two codes PO031 and P0031on a 2013 Lexus ES 350 I find it strange two bad oxygen sensors at once could this be bad gas ?

Mechanic's Assistant: Do you have a scan tool to read the codes?

Yes it gave me POO31 PO051

Mechanic's Assistant: Are you fixing your ES yourself? What have you tried so far?

Just went and looked at all the oxygen sensors to make sure Everything looked intact and in good shape

Show More
Show Less
Ask Your Own Lexus Question
Answered in 4 minutes by:
3/11/2018
Eric
Eric, Automotive Repair Shop Manager
Category: Lexus
Satisfied Customers: 34,918
Experience: 20+ yrs. experience as repair shop manager and technician.
Verified

HI,

While bad gas is certainly a possibility, I would more suspect the #1 integration relay that controls the O2 sensor heater circuits.

Give me a few minutes to pull the schematics and relay location

Ask Your Own Lexus Question
Customer reply replied 4 months ago
Oh yes just checked it also gave me a PO 302 which is the heater control circuit

Ok, in the engine compartment fuse box, check the fuse labeled A/F. This is the air/fuel sensor heater fuse for integration relay. Air/fuel sensor are the upstream O2 sensors

See attached for fuse location. It is a 20amp fuse. IF not sure if good or not, go ahead and replace with new fuse and erase codes and see if they come back and let me know

If for any reason, you can't rate my answer OKAY, GOOD, or EXCELLENT/3 STARS OR HIGHER today. Please reply and let me know why, so I can help more/better. All follow up responses are FREE, after completing the required rating
Please remember to rate service using the separate rating page. Thank you

Ask Your Own Lexus Question

Ok, in the engine compartment fuse box, check the fuse labeled A/F. This is the air/fuel sensor heater fuse for integration relay. Air/fuel sensor are the upstream O2 sensors

See attached for fuse location. It is a 20amp fuse. IF not sure if good or not, go ahead and replace with new fuse and erase codes and see if they come back and let me know

If for any reason, you can't rate my answer OKAY, GOOD, or EXCELLENT/3 STARS OR HIGHER today. Please reply and let me know why, so I can help more/better. All follow up responses are FREE, after completing the required rating
Please remember to rate service using the separate rating page. Thank you

Ask Your Own Lexus Question
Customer reply replied 4 months ago
Fused has to get an a cut knew the meter that does seem to be a little iffy at the contact point couple small nicks at the contact point so I'm going to go get a new fuse and gas

HI,

Ok, do that and if the codes come back, you will need to do the following

with key on, check for 12v at the black wire, pin 2, on the right side sensor harness connector and then on the green wire, pin 2 at the left side sensor harness connector

If 12v not present, then a bad integration relay, which unfortunately is integrated in the engine compartment fuse box circuitry and requires replacing the fuse box.

If 12v is present, then let me know and will go from there in testing.

Most times when you get these codes at the same time, it is either the fuse or the integration relay

If for any reason, you can't rate my answer OKAY, GOOD, or EXCELLENT/3 STARS OR HIGHER today. Please reply and let me know why, so I can help more/better. All follow up responses are FREE, after completing the required rating
Please remember to rate service using the separate rating page. Thank you

Ask Your Own Lexus Question
Customer reply replied 4 months ago
Put new gas in Joe about 5 miles replace fuse still same thing
Customer reply replied 4 months ago
Also car only has 47,000 miles on it

HI,

Ok, you need to check for 12v with key on at the wires I previously indicated. I suspect that the integration relay has failed.

Ask Your Own Lexus Question
Customer reply replied 4 months ago
OK I think I found the problem Eric it's called rat shit with the chewed the wire I can't believe I didn't get a code for that Lol
Customer reply replied 4 months ago
Do me a favor my wife says they build the five dollar fee three times can you make sure they just did it
Customer reply replied 4 months ago
Once
Customer reply replied 4 months ago
thank you again

HI,

You are welcome.

I dont see the billing end, but can send a message to customer service to check into it.

Please remember to use separate popup rating page to rate service. Thanks

Eric
Eric, Automotive Repair Shop Manager
Category: Lexus
Satisfied Customers: 34,918
Experience: 20+ yrs. experience as repair shop manager and technician.
Verified
Eric and 87 other Lexus Specialists are ready to help you
Ask your own question now
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 Eric Your Own Question
Eric
Eric
Eric, Automotive Repair Shop Manager
Category: Lexus
Satisfied Customers: 34,918
34,918 Satisfied Customers
Experience: 20+ yrs. experience as repair shop manager and technician.

Eric 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

1,840 satisfied customers

Lexus Expert

Ron Z.

Ron Z.

- Lexus Tech -

451 satisfied customers

18+yrs experience. State Inspector and Lexus Diagnostics

Chris (aka - Moose)

Chris (aka - Moose)

Technician

342 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

128 satisfied customers

30 YEARS EXPERIENCE, FORIEGN AND DOMESTIC, GAS AND DIESEL

< Previous | Next >

Related Lexus Questions
I have a 2000 Lexus ES 300 and when I crank the car up and
I have a 2000 Lexus ES 300 and when I crank the car up and press the gas it's like it has no power and the rpm's goes up real slow.… read more
HondaPlatinum
HondaPlatinum
High School or GED
148 satisfied customers
Afs flashing the switch works but will not turn off. 07
afs flashing the switch works but will not turn off … read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
Driver door will not lock, no beep ES-350 2013, ES-350, It
It happened few week ago then it went back to normal, I have not tried anything yet … read more
Gunvir Singh
Gunvir Singh
1,949 satisfied customers
Poo57 Code With p300/p302, New B2S2 O2 Sensor. Live data
Poo57 Code With p300/p302, New B2S2 O2 Sensor. Live data Shows No Activity On Either Downstream, Both Have 12v, Suspect Either Juntion Box For EFI Relay Bad Or ECM, Harness Good … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
I have a 2003 Lexus which is giving me a P430 DTC Code on
I have a 2003 Lexus which is giving me a P430 DTC Code on Bank 2 - Report reads Short Term Fuel Trim - Bank 2 @ 0.00% and Long Term Fuel Trim - Bank 2 at 2.34% … read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
1,840 satisfied customers
Can you connect me to the mechanic, wanna ask why when iam
wanna ask why when iam pressing on the pedal l do not get response l want l have a faulty oxygen sensor … read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
1,840 satisfied customers
Pearl, I have error codes on my 2002 lexus rx 300, 1 sensor
Hi Pearl, I have error codes on my 2002 lexus rx 300, for bank 1 sensor 1 and bank 2 sensor 1. Are these sensors the A/F sensor and Oxygen sensor? And, which is which? … read more
Kurt Kennedy
Kurt Kennedy
93 satisfied customers
Lexus RX350: I have a 2008 lexus RX 350 . The system check
I have a 2008 lexus RX 350 . The system check came on . The auto scanner came up with Poo31 Code . Ho2 s Bank 1 Sensor 1 heater circit low . I changed the upsream h2 sensor but I am still getting the … read more
Ron Z.
Ron Z.
- Lexus Tech -
Vocational, Technical or Trade Scho
451 satisfied customers
Lexus ES300: I OWN A 1997 LEXUS ES 300 THE ENGINE LIGHT IS
I OWN A 1997 LEXUS ES 300 THE ENGINE LIGHT IS ON I HAD A SCAN DONE CODE P0125 CAME UP CLOSED LOOP RUNNIG TO COLD SO I CHANGED THE SENSOR LOCATED BEHIND THE ANTIFREEZE FILLER NECK HOOKED THE BATTERY BA… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
1,840 satisfied customers
Lexus LS400: Have a 98 Lexus ls400 with check engine code p1346
Have a 98 Lexus ls400 with check engine code p1346 and check vsc light is on as well. I have clean oil control valve, checked timing/belt and everything is dead on. Also have change vvt sensor bank on… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
1,840 satisfied customers
Lexus Es 350: I have a lexus es 350 57,000 miles. Somtimes
I have a lexus es 350 57,000 miles. Somtimes When I attempt to start the car, the care will not start (no engine noises or ticking) and I receive a error message VCS and the traction icon illuminates.… read more
AMD
AMD
Master Technician
Vocational, Technical or Trade Scho
270 satisfied customers
Lexus ES350: 2007 lexus ES 350 108,000 lights on, scanned got
2007 lexus ES 350 108,000 lights on, scanned got p0420, & p0430 codes showing both o2 sensors & both cats bad. Reset codes, filled w/ 1/2 tank non ethonal gas & drove 30 miles hard. lights didn't come… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
1,840 satisfied customers
2007 Lexus: with 64,000 miles..warning lights..few seconds..high beam
My 2007 Lexus ES 350 with 64,000 miles just had the primary warning lights go on (VSC) 60 miles north of Phoenix on I17 in the middle of the night. It occurred a few seconds after switching on the hig… read more
Boxer54
Boxer54
Line Technician
2 years university - did not gradua
1,563 satisfied customers
1995 Lexus ES300: cars..Check Engine light comes on, the TRAC
Hello, I own a 1995 Lexus ES300 with 130,000 miles, and a 1999 Lexus ES300 with 115,000 miles. Over the past year both cars almost continually have the Check Engine light on. On the 1999 Lexus, when t… read more
Genchi Genbutsu
Genchi Genbutsu
Vocational, Technical or Trade Scho
3,526 satisfied customers
Gs: oxygen sensors..tune..i unhook the mass flow sensor but i
changed oxygen sensors in gs 300 94 car has 184000 miles gave it a tune up car still wont run right the car runs good when i unhook the mass flow sensor but i also changed that but it was not a new ma… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
1,840 satisfied customers
000 miles..It idles fine but will not accelerate..sits
On two occassions my 2003 ES 300 with 28,000 miles has lost acceleration. It idles fine but will not accelerate. After it sits overnight it will be fine.… read more
Boxer54
Boxer54
Line Technician
2 years university - did not gradua
1,563 satisfied customers
lexus: engine light..1995 es 300 V6 model..oxygen sensor
I have the engine light on for lexus 1995 es 300 V6 model. The dealer said it will cost me 445+tax and it is related to oxygen sensor valve problem. I am not sure how does it cost. I am unemployed and… read more
Boxer54
Boxer54
Line Technician
2 years university - did not gradua
1,563 satisfied customers
I have the check engine lite on with codes poo31 p2238 i
I have the check engine lite on with codes poo31 p2238 i think they are 02 sensor codes which one i have 2002 lexus es 300… read more
Ted the Technician
Ted the Technician
Service Manager
Vocational, Technical or Trade Scho
68 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