"Performance Limited" Error code

[hiimmike]

I have 1,200 miles on my Willys 2.0 turbo and always run premium. Yesterday it flashed the " Performance Limited Fuel System" message then it went away in less than 10 seconds. The day before I bought fuel from a station where I don't usual go so maybe that is it. I also pushed in all the fuses as others suggested and there at least 6 fuses that went click so they weren't fully seated. The message has only appeared once after it disappeared I jumped on the throttle and it responded normally without limited performance.

I was at the top of I70 at the Eisenhower tunnel in CO and I stepped on the gas and the Jeep didn’t go anywhere for about 5 seconds. Junk.

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[jmr]

I've had that happen to me in my RAM a couple of time. The Red throttle icon lights up there is no throttle response for a couple of second. Unfortunately this happened one time while I was crossing traffic that was not a pleasant experience.

I'm going to see what happens going into manual mode...something is tripping it.

 

[COBill]

I was at the top of I70 at the Eisenhower tunnel in CO and I stepped on the gas and the Jeep didn’t go anywhere for about 5 seconds.

I've had that happen too, but it was due to snow and ice on the road. ?

There's nothing quite like the fun of hitting the gas on an uphill incline like that and feeling your vehicle slide backwards as you apply throttle. ?

 

[hiimmike]

I've had that happen too, but it was due to snow and ice on the road. ?

There's nothing quite like the fun of hitting the gas on an uphill incline like that and feeling your vehicle slide backwards as you apply throttle. ?

Mine was quite different. The RPMs weren't increasing. The engine was taking the day off.

 

[Initial-Jeep]

service advisor recommended that I stop using 91 octane fuel and start using 85 octane. He said they've been seeing a lot of limited performance with the 91 octane on the 2.0 engine and the engines making weird noises and I should NOT be using 91 octane in that engine.

If he said 85 (and not 87), that's a quick way to ruin the engine (and void warranty, cf. manual p. 443); find someone else and do not follow his "recommendation" (quotes since that was a from-his-butt wild-ass guess). If nobody put an OBD scanner to your Jeep and take 15 minutes to look for the obvious, then that's a fail.

Also,

correlation != causation

.

Turbos require higher octane to avoid pre-detonation ("knock"). I'm surprised the manual allows for 87 (I wouldn't touch the stuff). Notice the manual states "high-quality" gasoline. Sheetz, AAFES are definitely not "high-quality" (I prefer Sunoco, Mobil; disprefer Philips 66).

Since the computer is noticing a problem with fuel delivery, air (turbo boost) can't be added since it'll run too lean and therefore, has to limit performance. You won't have the HRSPRS and TRQS and you won't have the gas mileage.

Old gas will cause this. Dirty gas will cause this (clogs fuel filter, clogs injectors--especially with GDI). Too-low octane will cause this. This is likely the cause: try a better brand, never get gas when you see refueling trucks at the gas station (filling the tanks kicks up all the dirt that was settled at the bottom and will now be pumped with your gas) and buy the highest octane available.

Also, run some Royal Purple (at ~1/4 tank, put this stuff in, fill up the tank to mix it) and thoroughly run the Jeep, get it hot, put it under load, go fast in lower gears to maintain RPMs for a bit. IOW, drive it like you stole it. I had to do this for both my PTs since I let the gas get too old (a few months) from not driving them.

Other mush lesser-likely possible causes:
- Fuel filter
- Fuel pump
- Injector(s)/coil(s)
- Electrical:
-- Power going to the injector coils
-- Injector wiring
-- Power to the fuel pump

To possible folks from the 4xe cost-benefit thread: this is what I meant by "higher maintenance" over the NA 3.6.

 

[Initial-Jeep]

Its not on her to check the fuses. She needs to drop the thing off at the dealer and not pick it up until they fix it.

I just got off the phone with the service department at Fort Collins Jeep in Fort Collins Colorado. They had to order a part to resolve the "Performand Limited" message. They ordered the electronic sway bar disconnect and a new front sway bar.

I said, "That doesn't make sense, what does the sway bar have to do with the fuel system?"

His reply was, "you have to understand how these things work, if the car thinks the sway bar is disconnected, it will limit your performance, it won't give you full throttle."

I laughed and said, "okay, I'll be in to pick it up today"

I'm curious, @mwilk012, do you still maintain this dealer-almighty position?

-+-

There's no damn way I would let that department touch my vehicles--no, not even my lawnmower--and this nonsense is what motivates me to refer to them as "dealer monkeys", bangin' on the vehicle with sticks to fix it.

 

[hiimmike]

If he said 85 (and not 87), that's a quick way to ruin the engine (and void warranty, cf. manual p. 443); find someone else and do not follow his "recommendation" (quotes since that was a from-his-butt wild-ass guess). If nobody put an OBD scanner to your Jeep and take 15 minutes to look for the obvious, then that's a fail.

Also,

correlation != causation

.

Turbos require higher octane to avoid pre-detonation ("knock"). I'm surprised the manual allows for 87 (I wouldn't touch the stuff). Notice the manual states "high-quality" gasoline. Sheetz, AAFES are definitely not "high-quality" (I prefer Sunoco, Mobil; disprefer Philips 66).

Since the computer is noticing a problem with fuel delivery, air (turbo boost) can't be added since it'll run too lean and therefore, has to limit performance. You won't have the HRSPRS and TRQS and you won't have the gas mileage.

Old gas will cause this. Dirty gas will cause this (clogs fuel filter, clogs injectors--especially with GDI). Too-low octane will cause this. This is likely the cause: try a better brand, never get gas when you see refueling trucks at the gas station (filling the tanks kicks up all the dirt that was settled at the bottom and will now be pumped with your gas) and buy the highest octane available.

Also, run some Royal Purple (at ~1/4 tank, put this stuff in, fill up the tank to mix it) and thoroughly run the Jeep, get it hot, put it under load, go fast in lower gears to maintain RPMs for a bit. IOW, drive it like you stole it. I had to do this for both my PTs since I let the gas get too old (a few months) from not driving them.

Other mush lesser-likely possible causes:
- Fuel filter
- Fuel pump
- Injector(s)/coil(s)
- Electrical:
-- Power going to the injector coils
-- Injector wiring
-- Power to the fuel pump

To possible folks from the 4xe cost-benefit thread: this is what I meant by "higher maintenance" over the NA 3.6.

https://youtube.com/clip/UgkxdC5iCzkp6syhl3ryVBgvDdVj8QX0JLbQ


85 in CO is like 87 elsewhere because of the thinner air. The manual does state 87 is permissible and I must assume the ECU will adjust fuel delivery and detonation.

 

[Initial-Jeep]

https://youtube.com/clip/UgkxdC5iCzkp6syhl3ryVBgvDdVj8QX0JLbQ


85 in CO is like 87 elsewhere because of the thinner air. The manual does state 87 is permissible and I must assume the ECU will adjust fuel delivery and detonation.

Yeah, I lived in CO Springs and that claim is BS and especially for turbos. Also, the manual doesn't make such affordances.

 

[mwilk012]

I'm curious, @mwilk012, do you still maintain this dealer-almighty position?

-+-

There's no damn way I would let that department touch my vehicles--no, not even my lawnmower--and this nonsense is what motivates me to refer to them as "dealer monkeys", bangin' on the vehicle with sticks to fix it.

Only the dealership will be able to rectify this problem, as it is clearly a software issue. The individual tech in this case is obviously an idiot.

 

[Initial-Jeep]

Only the dealership will be able to rectify this problem, as it is clearly a software issue. The individual tech in this case is obviously an idiot.

Wow, that was--I thought--clearly rhetorical.

Well, you got the last one right.

Only dealerships can fix Jeeps? Especially the ones who ignore plain, clear, specific diagnostic output and replace swaybars and disconnects to fix the problem?

FCA made it idiot-proof and dealers hired better idiots.

"Software issue"? Possible but least likely. Very least. If software points to a fault, you don't ignore it.

I did neglect to put sensors on my list; knock and O2 sensors...but that would be strange that a whole bunch of new 2-liter Jeeps' sensors went bad around the same time.

 

[hiimmike]

Wow, that was--I thought--clearly rhetorical.

Well, you got the last one right.

Only dealerships can fix Jeeps? Especially the ones who ignore plain, clear, specific diagnostic output and replace swaybars and disconnects to fix the problem?

FCA made it idiot-proof and dealers hired better idiots.

"Software issue"? Possible but least likely. Very least. If software points to a fault, you don't ignore it.

I did neglect to put sensors on my list; knock and O2 sensors...but that would be strange that a whole bunch of new 2-liter Jeeps' sensors went bad around the same time.

None of us experience know. Also, the dealers do not get any codes when they hook up their magic stuff to the Jeeps. They all say, “no error codes, nothing we can do.”

it’s possible they’re replacing my sway bar because while in Moab I received a message about service sway bar and that code was in there until cleared. It went away after I returned to flat ground. It didn’t seem like an issue, I though maybe I tried to connect it back while not flat.

 

[Megawatt]

2022 2.0L auto Rubi. 1,331 miles. 87 octane.

Was driving 72mph on highway, decelerating to make a turn off highway. No brakes applied, just coasting down. Got the message to pop up for couple seconds. Engine is on, no change in performance. Trans in drive, no manual shifting all day long.

Message disappepars, when’t wheeling from 4000 elevation up to 7,770 elevation, 4hi, 4 lo, disco, rear locker etc. Three hrs of wheeling in the mountain with zero issues.

This is second time I have seen message and both were non factors in driving besides being a distraction.

 

[mxz]

We are also still getting this message for a few seconds a couple times a week. There are no codes stored. Happens with 87 or 91 and doesn't matter what gas station we use.

 

[Initial-Jeep]

None of us experience know. Also, the dealers do not get any codes when they hook up their magic stuff to the Jeeps. They all say, “no error codes, nothing we can do.”

That takes 2 minutes. The 15 minutes was to check air/fuel mixture, pressures, voltages, and other non-critical codes that don't show up on a first look.

Were it me, I would keep Blue Driver hooked up and logging to record telemetry when it happens again. I would also keep an eye out for TSBs that may shed some light.

 

[hiimmike]

Thinking about this, I think it only seems to happen to me under deceleration. Anyone else seen it happen under acceleration?

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