Nissan

Nissan Repair Questions? Ask a Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Nissan
This answer was rated:

2001 frontier: crew cab..3.3l v-6..obd-II

2001 frontier crew cab with...
2001 frontier crew cab with 3.3l v-6. Idle was high for a few days @ 1000 rpm, obd-II po510 tps sensor problem. sensor was replaced. Immediately after replacing sensor, rpm now 1100, obd-II now reads po120 pedal sensor failure & every time it goes into 2nd gear it down shifts to 1st...revs up to 3000 rpm, then goes back into 2nd gear before continuing normally.
Show More
Show Less
Ask Your Own Nissan Question
Answered in 4 hours by:
1/20/2009
AutoTech08
AutoTech08, Workshop owner
Category: Nissan
Satisfied Customers: 973
Experience: Diploma in Automotive Engineering, 30 years working experience.
Verified

Hi there,

 

DTC P0510: CLOSED THROTTLE POSITION (TP) SWITCH

 

DTC P0120: THROTTLE POSITION (TP) SENSOR

 

When installing the TPS, it has to be adjusted correctly failing which it would cause the code to show.

 

1. Check Base Idle Speed

Check idle speed. Base idle speed should be 650-750 RPM with transmission in Park or Neutral. If idle speed is as specified, go to next step. If idle speed is not as specified, adjust by turning idle speed adjusting screw. See Fig. 16 . Go to next step.

 

graphic

 

 

2. Check Closed TP Switch Idle Position

Turn ignition off. Reconnect all harness connectors. Start engine and warm to normal operating temperature. Turn ignition off. Disconnect TP switch harness connector. See Fig. 17 . Insert a .012" (.30 mm) feeler gauge between throttle adjusting screw and stopper. See Fig. 18 .

 

graphic

 

graphic

 

3. Check continuity between TP switch terminals No. 4 and 5. See Fig. 17 . Continuity should exist. Remove .012" (.30 mm) feeler gauge, and insert .016" (.40 mm) feeler gauge. Continuity should not exist. If continuity is as specified, go to step 6. If continuity is not as specified, go to next step.

 

4. TP Sensor Idle Position Adjustment

Ensure engine is at normal operating temperature. Loosen TP sensor bolts. Remove .016" (.40 mm) feeler gauge, and insert .014" (.35 mm) feeler gauge. Open and close throttle. Continuity should not exist while closing throttle. If continuity exists, turn TP sensor body clockwise until continuity does not exist.

5. Remove .014" (.35 mm) feeler gauge, and insert .012" (.30 mm) feeler gauge. Slowly rotate TP sensor body counterclockwise until continuity exists, then tighten TP sensor bolts. Ensure continuity exists when throttle is closed and does not exist when throttle is open. Repeat 2 or 3 times. Remove .012" (.30 mm) feeler gauge, and insert .016" (.40 mm) feeler gauge. Ensure continuity does not exist when throttle is closed. Repeat 2 or 3 times. Go to next step.

 

6. Reset TP Sensor Idle Position Memory

Remove feeler gauge. Reconnect all harness connectors. Start engine and warm to normal operating temperature. Turn ignition off. Turn ignition on, wait at least 5 seconds, then turn ignition off and wait at least 5 seconds. Repeat 20 times. Go to next step.

 

7. Check Target Idle Speed

Check idle speed. Target idle speed should be 700-800 RPM with transmission in Park or Neutral. If idle speed is as specified, go to next step. If idle speed is not as specified, adjust by turning idle speed adjusting screw. See Fig. 16 . Go to next step.

 

8. Clear DTC Memory

DTCs may be stored in ECM and/or Transmission Control Module (TCM) from performing basic inspection. Clear DTCs from ECM and TCM.

 

 

Ask Your Own Nissan Question
Customer reply replied 9 years ago
I followed the procedures to the point of " Reset TP Sensor Idle Position Memory" because no matter how far I turned the sensor either way to adjust it...the continuity would not turn off as described in the tps adjustment procedure. Tester is a brand new, computer safe continuity tester I bought at Advanced Auto Parts. So the idle speed is now adjusted, the obd-II still reads PO120, pedal position sensor malfunction, and the transmission still downshifts on it's own in 2nd gear. Any more suggestions? Again, the TP sensor is new and has the same hitachi numbers as the original.

While installing TP sensor, did you check the positioning of the pin?

 

I would suggest removing the TP sensor and reinstall, noting the mating marks. If this does not solve the problem, you have a bad TP sensor.

 

 

AutoTech08
AutoTech08, Workshop owner
Category: Nissan
Satisfied Customers: 973
Experience: Diploma in Automotive Engineering, 30 years working experience.
Verified
AutoTech08 and 87 other Nissan Specialists are ready to help you
Ask your own question now
Customer reply replied 9 years ago
I anticipated the mating problem when I installed it. I'm leaning towards a bad sensor and had the parts store order another one. I try it again in the morning. Thanx.
Ask AutoTech08 Your Own Question
AutoTech08
AutoTech08
AutoTech08, Workshop owner
Category: Nissan
Satisfied Customers: 973
973 Satisfied Customers
Experience: Diploma in Automotive Engineering, 30 years working experience.

AutoTech08 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
Our nissan frontier did not get cranked during a two week
our nissan frontier did not get cranked during a two week period when it got extreamly cold and then when we finally were able to crank it, it started to miss and shake so we got a new battery and it … read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
Where is the knock sensor located on a Nissan Frontier with
Where is the knock sensor located on a Nissan Frontier with 3.3 engine and it a 2004 model… read more
Ron Z.
Ron Z.
Vocational, Technical or Trade Scho
2 satisfied customers
Engine does when headlights are turned 2000nissan frontier.
Engine does when headlights are turned 2000nissan frontier … read more
Jared D
Jared D
Shop Supervisor
Bachelor\u0027s
3 satisfied customers
1998 Nissan Frontier. Battery is good. Just replaced
1998 Nissan Frontier. Battery is good. Just replaced starter. Still no cranking … read more
kwiggins29059
kwiggins29059
Associate Degree
219 satisfied customers
I have a 2004 Frontier SC and just recently the doors
I have a 2004 Frontier SC and just recently the doors randomly lock, four way lights flash and the horn beeps. I have pull the batteries out of the remotes to eliminate them and I have check to ensure… read more
3pac2222
3pac2222
nissan master auto tech
Associate Degree
2 satisfied customers
2001 nissan frontier temp gauge not working. where do i
2001 nissan frontier temp gauge not working. where do i locate the sensor if probable cause … read more
3pac2222
3pac2222
nissan master auto tech
Associate Degree
2 satisfied customers
The heat does not work in my 2010 nissan frontier. No the
no the coolant level is good the truck only works in a/c … read more
Gabriel Grey
Gabriel Grey
Master Service Technician
Associates
375 satisfied customers
The heat does not work in my 2010 nissan frontier. No the
no the coolant level is good the truck only works in a/c … read more
Gabriel Grey
Gabriel Grey
Master Service Technician
Associates
375 satisfied customers
The heat does not work in my 2010 nissan frontier. No the
no the coolant level is good the truck only works in a/c … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
Nissan Frontier has only 8777 miles on it. today went
Nissan Frontier has only 8777 miles on it. today went outside to start it it wanted to turn over but would not now finally it turned over and started. Our neighbor checked the battery with his meter a… read more
FixUrNissan
FixUrNissan
Shop Forman / Lead Tech / Parent
Vocational, Technical or Trade Scho
1 satisfied customers
2010 Nissan frontier crecab4.0 crank no start. Check for
2010 Nissan frontier crecab4.0 crank no start JA: Will the headlights turn on? Is the battery fully charged? Customer: yes JA: Are you fixing your Frontier yourself? What have you tried so far? Custom… read more
3pac2222
3pac2222
nissan master auto tech
Associate Degree
2 satisfied customers
It will not lock into 4wd. 2008 frontier. I just found out
I just found out yesterday. If i can fix it myself I will … read more
FixUrNissan
FixUrNissan
Shop Forman / Lead Tech / Parent
Vocational, Technical or Trade Scho
1 satisfied customers
1999 Frontier needs frequent coolant added but passed a
Hi. 1999 Frontier needs frequent coolant added but passed a pressure test. Totally overheated a few months ago when I didn't know coolant was low. Otherwise runs well. Possible sources? … read more
Toyota Service
Toyota Service
Toyota Dealership Service & CR Manager
1,344 satisfied customers
2003 Frontier will not go in reverse. Shows a P0720 code.
2003 Frontier will not go in reverse. Shows a P0720 code … read more
FixUrNissan
FixUrNissan
Shop Forman / Lead Tech / Parent
Vocational, Technical or Trade Scho
1 satisfied customers
I just purchased a 2015 Frontier and yesterday the airbag
I just purchased a 2015 Frontier and yesterday the airbag light starting flashing. In diagnosis mode indicated a code12. … read more
3pac2222
3pac2222
nissan master auto tech
Associate Degree
2 satisfied customers
My 2006 Nissan Frontier leaked coolant into transmission
My 2006 Nissan Frontier leaked coolant into transmission cooler. The radiator was replaced and transmission flushed with new filter. Now the transmission slips and doesn't shift properly. can it be fi… read more
FixUrNissan
FixUrNissan
Shop Forman / Lead Tech / Parent
Vocational, Technical or Trade Scho
1 satisfied customers
Nissan frontier, transmission is slipping. Is it clutch or
Nissan frontier, transmission is slipping. Is it clutch or electrical failure? P0717 & p1705… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,442 satisfied customers
Is there a relay for the starter on a 2000 nissan frontier
Is there a relay for the starter on a 2000 nissan frontier truck … read more
camerontech
camerontech
20 year experience diagnostic technician
class a
560 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