limp mode? how to get out of it
 

so i think i am in limp mode it woundnt rev after the car starts only when at start up, so does using a code reader clear it or does resetting the ecu helps? thanks (no limp mode here guys) it was just some throttle peddle sensor.

also, is the check engine light the engine service soon light sensor on the z? or is it different?

edit: so i didnt do the ecu reset because it didnt need it, but i did do the code reader and found a few codes for it some of it cleared but only 1 keeps coming back after clearing it.. i believe its p2135 something about the throttle peddle position sensor, im trying to figure that out.

does anyone know where the airbag sensor wires are? i try looking for it but dont see it anywhere.

Get hard

Depends on why it's in limp mode. You should be able to clear it using an OBD scanner. If that doesn't work, reset the ECM.

i have no clue why it it was in limp mode in the first place but from research it woundnt rev right, its like its stuck at that specific rpm.. so it think its a limp mode problem, but either way ill do both!

also the engine service soon light is on and im not sure if thats the check engine light or not. can you tell me?

Yes ... but I'd rather teach you to fish than feed you. If you can't find what you need in the Owner's Manual, check the FSM.

Best response ever! :roflpuke2:

I'll do that later, so the lights means the same thing right?

The OM and FSM will tell you what the different idiot lights mean.

The FSM will tell you what can put the car into limp mode and how to clear it.

i found the sensor lights but i couldnt find limp mode in fsm

is it stuck around 3k rpm or so? and ate you AT or MT?

i wish it was around 3k too bad it woundnt accelerate up to 1500, like i said when i first start the car it would go up to 8-9k after a few seconds of revving it gets down to 1k and when i accelerate it gets stuck at 1500.. i have a automatic

shut the car off, let it sit for 10-20 min, restart. that got me out of limp mode when the tranny felt the need to put the ECU into limp mode one day. I was able to shift gears in the AT but stuck under 3k rpm.

try that.

i let the car sit for the whole 24 hour and its still the same thing, so now its just sitting taking up space!

hmmm. yup go back to initial comments of hitting it with a scanner and seeing if a code pops. there may be something bigger than just limp mode.

maybe do a reset but unhooking the battery for a bit then reconnect and start up.

yes will definitely do that alittle bit later today and about the battery part i took that out for a few hours and same problem existed.

:iagree:

If you had the battery out for that long then you have either a "permanent" DTC (survives a power-off but can be cleared with a scanner) or you have a mechanical/sensor problem that the ECM doesn't like much but not bad enough to shut down. Edit: or it could be both.

For DIY diagnosing/repairing/modding, the FSM is the place to start. It can be intimidating if you are new to working on cars and Nissan sometimes has some weird nomenclature but it is what a Nissan tech will use (along with CONSULT software - if you have to ask how much, you can't afford it) if you take it to a dealer.

8,000 to 9,000 RPM? :eek:

I've been assuming that was the gauge's startup self-test. If he's actually revving that high, it would explain a lot.

my bad haha 7-8k

the only reason why i rev to the maximum is because mine cant go anymore than 1500k after that

Was the car wrecked? Your other posts make it seem like it was in an accident. Was there a lot of damage?

Why would you rev a cold engine to 7-8 kRPM?

This. Let the car warm up.

yes, yes it is, i never mention that because i didnt think it was a big deal.
no its not bad at all, its pretty decent, but so far i think i know whats causing it i updated the post at the top to let you all know. it was the throttle peddle position, i just need to know how to fix it then that should be good.

not for fun thats for sure, it was a problem with the car so thats why i rev it, is it bad to rev a car if its cold?

thanks, so its better to let the car warm up alittle to rev it?

Could also be the throttle position sensor(s) (or the actuator(s)) on the throttle body(s). Search this site for "throttle relearn".

i think its the position sensor but ill check both

This times 100.

The logic behind your procedure escapes me. Why would you want to spin a malfunctioning engine (or any other device) to its normal maximum? The car believes it doesn't need to spin very fast - until you figure out what the problem is, pay attention to the car.

Yes. Not likely to do immediate damage to an engine in good shape but it takes a few minutes off its lifespan. Bumping the limiter, even when warmed up, is not something to get in the habit of doing unless you can afford to fix things when they break.

Alright will do, I'll keep everyone update about the car

everything working fine now, it was the throttle body, i had to replace it.