Nissan

Nissan Repair Questions? Ask a Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Nissan

2000 nissan sentra gxe automatic qg18de codes po420/po430/p0505

Customer Question
1st two plugs towards front...
2000 nissan sentra gxe automatic qg18de codes po420/po430/p0505 1st two plugs towards front of motor are black last two to rite look fine. runs great when plugs are clean .when two left plugs get dirty/fouled car wont start unless you give /pump lots of gass/clean plugs starts great/runs great.then starts all over again about every 500 miles.clean plugs beceause have bought to many.need to fix problem.
Submitted: 6 years ago.Category: Nissan
Show More
Show Less
Ask Your Own Nissan Question
Answered in 7 hours by:
1/2/2012
Nissan Mechanic: rpmdiag, Tech and Instructor replied 6 years ago
rpmdiag
rpmdiag, Tech and Instructor
Category: Nissan
Satisfied Customers: 8,426
Experience: Since 1975
Verified

rpmdiag :

Hi, I'm Ron and I can help you. It looks like the cats are bad or the O2's are reading wrong. This problem needs to be corrected first. Make certain the O2'sare working right, don'y worry about the cats yet, we need to get this in fuel control first. If the O2's are good, then weneed to lookfor leaky fuel injectors in those cylinders. See attachment of how a good O2 should look in each segment. Hope this helps, Ron

Full Size Image

Ask Your Own Nissan Question
Ask rpmdiag Your Own Question
rpmdiag
rpmdiag
rpmdiag, Tech and Instructor
Category: Nissan
Satisfied Customers: 8,426
8,426 Satisfied Customers
Experience: Since 1975

rpmdiag 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:

I was in trouble with an electrical issue with my brand new Nissan. I frantically went online trying to find help and luckily I found your site. I reached a NISSAN tech named RIP. He was absolutely tremendous and helped me work through the issue. What a pro!

cjazLexington, KY

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

< Previous | Next >

Meet the Experts:

Chris(aka-Moose)

Chris(aka-Moose)

Nissan Technician

664 satisfied customers

16 years of experience

Tim Mohr

Tim Mohr

ASE MASTER TECH

584 satisfied customers

30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

Marty

Marty

ASE Certified Technician

152 satisfied customers

ASE & Bosch master tech. 30 years experience.

Mike V.

Mike V.

Nissan Technician

9,332 satisfied customers

Nissan factory trained and Certified Subaru Technician.

Ron

Ron

ASE Certified Technician

555 satisfied customers

34 years of automotive Repair

Anthony

Anthony

ASE Certified Technician

332 satisfied customers

ASE Master Automobile Technician with over 18 years exp. in this field.

Richard

Richard

ASE Certified Technician

92 satisfied customers

Nissan Tech ASE certified technician

< Previous | Next >

Related Nissan Questions
1987 Nissan D21 3 L. Fuel Injection issue. Fuel injectors
1987 Nissan D21 3 L. Fuel Injection issue. Fuel injectors always have power even with key off. Sometimes fuel pressure is perfect at 40 PSI, sometimes 0.… read more
FixUrNissan
FixUrNissan
Shop Forman / Lead Tech / Parent
Vocational, Technical or Trade Scho
1 satisfied customers
1998 nissan overheathing twin cam 16 valve sentra gxe where
1998 nissan overheathing twin cam 16 valve sentra gxe where is the thermostate located … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,429 satisfied customers
2001 Nissan Sentra gxe won't start.. the cam position sensor
Hey my 2001 Nissan Sentra gxe won't start.. the cam position sensor was unplugged … read more
FixUrNissan
FixUrNissan
Shop Forman / Lead Tech / Parent
Vocational, Technical or Trade Scho
1 satisfied customers
1997 Nissan sentra gxe will not crank over. All that is
Second opinion] 1997 Nissan sentra gxe will not crank over… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,429 satisfied customers
1997 Nissan sentra gxe will not crank over. All that is
all that is good, new starter, new battery, new iginion switch … read more
FixUrNissan
FixUrNissan
Shop Forman / Lead Tech / Parent
Vocational, Technical or Trade Scho
1 satisfied customers
I have a 2001 Nissan Sentra GXE. Ok so my Mom left the
I have a 2001 Nissan Sentra GXE. Ok so my Mom left the headlights on in my car killing the battery. Hooked it up to jump start it and it wouldn't start. It turns over like it wants to start but doesn'… read more
FixUrNissan
FixUrNissan
Shop Forman / Lead Tech / Parent
Vocational, Technical or Trade Scho
1 satisfied customers
Having an annoying issue with an 02 sentra gxe with the 1.8L
Having an annoying issue with an 02 sentra gxe with the 1.8L engine. Someone who owned this car before has tried and tried to track down this issue to what looks like no avail. Wiring harness has been… read more
FixUrNissan
FixUrNissan
Shop Forman / Lead Tech / Parent
Vocational, Technical or Trade Scho
1 satisfied customers
I have 2003 nissan sentra gxe.. over the summer sometime my
Hi.. I have 2003 nissan sentra gxe.. over the summer sometime my running lights quit working.. was no biggy I had headlights.. but now the bright on the driverside doesn't work either. have changed th… read more
Todd M
Todd M
Owner
ASE Certification
1,492 satisfied customers
I got 1999 Nissan Sentra GXE There is loud rattling noise
I got 1999 Nissan Sentra GXE There is loud rattling noise from the back … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,429 satisfied customers
My 1999 nissan sentra gxe will not start after i changed out
my 1999 nissan sentra gxe will not start after i changed out pass. side axle. Changed out distributor after checking it with my meter. There is power to the dist. but i have no spark. … read more
Shawn Few
Shawn Few
AS
71 satisfied customers
2003 Nissan Sentra gxe. Brake pedal is firm and works great
Hi, 2003 Nissan Sentra gxe. Brake pedal is firm and works great at times then goes to the floor other times. Sometimes while sitting at a stop the pedal will suddenly lose pressure and go to the floor… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,429 satisfied customers
2002 Nissan sentra gxe, service engine soon light always
2002 Nissan sentra gxe , service engine soon light always on.....need inspection soon ????????????????… read more
Mike V.
Mike V.
Nissan Technician
High School or GED
9,332 satisfied customers
My son has a 2001 Nissan Sentra GXE. He was having problems
Hi: My son has a 2001 Nissan Sentra GXE. He was having problems with the engine "missing" and stuttering at low RPM, then last week it wouldn't start at all. Towed it to a shop and they replaced the s… read more
FixUrNissan
FixUrNissan
Shop Forman / Lead Tech / Parent
Vocational, Technical or Trade Scho
1 satisfied customers
I have a 1996 Sentra GXE and the cruise control stopped
I have a 1996 Sentra GXE and the cruise control stopped working … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
I had an '01 Nissan Sentra GXE. It cranks but won't start. I
I had an '01 Nissan Sentra GXE. It cranks but won't start. I checked the Fuel Pump Relay (clicks when turning key on). I've checked the fuel pump fuse (intact). I've listened for the fuel pump (makes … read more
Chris(aka-Moose)
Chris(aka-Moose)
Nissan Technician
Vocational, Technical or Trade School
664 satisfied customers
I have a 200 Nissan sentra gxe, best car ive ever had it
I have a 200 Nissan sentra gxe, best car ive ever had it apprears the bar that runs between the back tires that's partially enclosed in a "u" shaped bar which would be the equivalent to the axel has r… read more
Mike V.
Mike V.
Nissan Technician
High School or GED
9,332 satisfied customers
Have a 2003 Nissan sentra gxe 1.8 l check engine light came
have a 2003 Nissan sentra gxe 1.8 l check engine light came on took it to auto zone there code read out was a p1574 replace vss I replaced it twice the first time the check engine light went off as so… read more
FixUrNissan
FixUrNissan
Shop Forman / Lead Tech / Parent
Vocational, Technical or Trade Scho
1 satisfied customers
2002 nissan sentra gxe clean bill of health except for oil
2002 nissan sentra gxe clean bill of health except for oil leak anyway out of the blue it will not start just keeps cranking and cranking but won't turn over… read more
Mike V.
Mike V.
Nissan Technician
High School or GED
9,332 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