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Acceleration problem Limp mode?

Tiny
PRIMET1ME
  • MEMBER
  • 2007 NISSAN MAXIMA
  • 49,500 MILES
Accelerates fine to about 35-40mph. At that point, RPMs continue to go up with increased accelerator pressure, but no acceleration. Upon continued gas pedal pressure, the speed very slowly and gradually increases. When brakes are applied, car stops fine w/ no odd sounds. Mechanic is saying the ABS system and actuator is causing this. Does this sound right?
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Friday, February 24th, 2012 AT 9:31 PM

11 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hello,

This is common when the throttle actuator needs to be serviced here is a guide to help you fix the problem.

https://www.2carpros.com/articles/throttle-actuator-service

Please run down this guide and report back.
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Friday, February 24th, 2012 AT 9:41 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Check the trans. Fluid and take it to have the tranny tested. This is no abs problem. Take it to midas and have your codes checked for free.
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Friday, February 24th, 2012 AT 10:10 PM
Tiny
BEAVERBEEK
  • MEMBER
  • 1 POST
Cost me $14.00 I had to follow the guide worked perfect! Fixed
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Friday, August 3rd, 2012 AT 1:45 PM
Tiny
JEANNETTE RITTER
  • MEMBER
  • 4 POSTS
  • 2005 NISSAN MAXIMA
  • 3.5L
  • 199,000 MILES
The fail safe mode (limp mode. I have replaced the following; valve covers and gaskets (found oil in spark plug chamber #5), all of the plugs. I have cleaned the MAF, the TBS. Relearned the idle and it is still in limp mode.
No check engine light, but diagnostics pull p0300 code.
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Friday, November 15th, 2019 AT 5:08 PM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
You only have a code P0300 and it is going into limp mode? That does not really make sense when a car goes into limp mode it is usually because a failure in the throttle by wire system. Have you had the car scanned by a professional scan tool or just a diy'er code reader?
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Friday, November 15th, 2019 AT 5:08 PM (Merged)
Tiny
JEANNETTE RITTER
  • MEMBER
  • 4 POSTS
DIY reader.
We bought the car used in February. It was in limp mode then. The woman I bought it from said that it was because it had been impounded (Parked on the street during a winter parking ban) and the towing company had pulled a plug to ensure the car could not be driven away. I think she said it was like a vacuum plug or intake plug? She said it only had to be relearned. We have tried relearning it after each fix, and still nothing. My local Nissan dealership is not trustworthy, so I do not know where else to bring this car where I will not get charged hundreds of dollars for something that may not need repairing. This is why we are trying to do it ourselves.
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Friday, November 15th, 2019 AT 5:08 PM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
I just need all the information a random misfire code does not make sense to me putting the car into limp mode. Cars are complex now with many computers and a lot of subsystems that are ran by those computers. Without the correct information like all the codes the computer is setting etc. You are fishing with dynamite by just replacing a part here or there. Also a lot of times you need a professional scan tool to help diagnose the problem. I wish this was not true I could have spent all the money I spent on my expensive professional scan tool on something else. I tried to not get one by getting away with a less expensive one lol. But all it did was cause frustration and waste time. The first thing I would do if I was fixing the car for you is see what codes you have in the computer that would be my starting point along with a visual inspection under the hood.
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Friday, November 15th, 2019 AT 5:08 PM (Merged)
Tiny
JEANNETTE RITTER
  • MEMBER
  • 4 POSTS
Is there a different method to find codes in the computer?
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Friday, November 15th, 2019 AT 5:08 PM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,840 POSTS
The main reason the computer can be in limp mode is because the thermostat is stuck open not allowing the engine to heat up, here is more information on this problem

https://www.2carpros.com/articles/scan-test-is-incomplete-p1000

Let me know what you find.

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Friday, November 15th, 2019 AT 5:08 PM (Merged)
Tiny
DENNYNELS
  • MEMBER
  • 1 POST
  • 2000 NISSAN MAXIMA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 18,000 MILES
My car goes into Limp Mode-won't go more than 20 MPH. No check engine light goes on. After several minutes sitting it will run perfect. The car runs great for any trip less then 15-20 miles. Any ideas?
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Friday, November 15th, 2019 AT 5:09 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi DennyNels,

When the engine goes into Limp Mode, some major component is not working and it could be the ECU or bad power or ground connections that deteriorates with heat buildup.

Even though no check engine light has shown, I would suggest scanning the ECM to see if any had been recorded.

If scanning does not fiand any codes, try checking the ECM connectors for corrosion, contaminations.
Also check engine and body groundings.
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Friday, November 15th, 2019 AT 5:09 PM (Merged)

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