What is LIMP Mode?

**2TROLLFAM** · 5th May 2014, 06:57 PM

Originally Posted by mudski

When you experience limp mode your car will have no power, at all. The only way to get the power back is to let off the go pedal and then back on again. What you experienced, doesn't look like limp mode to me. As even if you floor it nothing will happen when in limp mode until you let off the go pedal and back on again.
Have you clean the air flow meter at all since owning the car? If not I would get some air flow meter spray and clean it firstly. Second, if you can get a hold of a scan gauge or this diag tool to plug in and try to replicate the issue, hopefully this will tell you more.
Limp mode is a safety function the ECU uses to stop over boosting of the engine. In the earlier direct injection models, this was a bigger issue, more so than the CRD's. The function is still used in the CRD models but the ECU seems to control the boost a bit better than the older Di's.

Thanks - I'll look into those that tomorrow at work.

I also phone our local Nissan dealer and they said the same thing that it didn't sound like limp mode so that makes me feel better.

**2TROLLFAM** · 5th May 2014, 06:59 PM

Originally Posted by threedogs

Was your engine cold when this happened, or coldish

Yeah - car had been sitting all day and this happened only 5mins down the road

**threedogs** · 5th May 2014, 07:12 PM

From memory the ECU will not allow you to "race" the motor when its cold.
I think that's what happened, try again with a warm motor and I think all will be OK.
Maybe someone else can confirm this.
BTW welcome back

**2TROLLFAM** · 5th May 2014, 07:14 PM

Originally Posted by threedogs

From memory the ECU will not allow you to "race" the motor when its cold.
I think that's what happened, try again with a warm motor and I think all will be OK.
Maybe someone else can confirm this.
BTW welcome back

Ok, thanks - I did try on my way home last night which was at least half an hour later (20mins of that doing 100 on the highway) and it was fine ..

**threedogs** · 5th May 2014, 07:26 PM

Great I'm pretty confident that was the problem.

**Sir Roofy** · 5th May 2014, 07:44 PM

Originally Posted by threedogs

great i'm pretty confident that was the problem.

think your right 3d been awhile since i had the auto but sounds right
wont let you go till reaches engine temp

**mojo53** · 5th September 2014, 06:23 AM

My thoughts exactly Chimo lol

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