Engine Check Malfunction Indicator warning light Triggered on Mojave

[joeym7]

Hello folks, I had a great day at the beach with Mojave (2022, 1275mi) today, but sometime while I was there mostly driving in 4H with Off Road plus on (not sure this has anything to do with it or not I was on the beach in July and NP with the light), the light triggered (meaning it is staying on but - it is (not) blinking)...The manual tells me: "Certain conditions such as a loose or missing gas cap, poor fuel quality, ETC., may illuminate it after the engine starts. The vehicle should be serviced if the light stay on through several typical driving styles."...I checked the gas cap, it seems fine...In comparison, the Mopar "Nanny" (which I don't mind this time) is telling me I should service it now - they sent me an e-mail.

Has anyone had this light trigger on their Gladiators? What was the cause/how did it resolve/did you need to take it in for service just for this (good grief :-()?

And WTH is the "etc." they put in the manual, wish they were more specific?

Thanks for your help,
-Joe

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[RJinPV]

You should get a OBDII code reader and then you will know why the light is on. I have a BlueDriver which costs a little over $100. https://us.bluedriver.com/products/bluedriver-scan-tool
Other members may have their favorite readers too.

Alternatively, I think some auto parts stores (Maybe Autozone or Advance Auto?) will read the codes for free.

 

[ShadowsPapa]

Hello folks, I had a great day at the beach with Mojave (2022, 1275mi) today, but sometime while I was there mostly driving in 4H with Off Road plus on (not sure this has anything to do with it or not I was on the beach in July and NP with the light), the light triggered (meaning it is staying on but - it is (not) blinking)...The manual tells me: "Certain conditions such as a loose or missing gas cap, poor fuel quality, ETC., may illuminate it after the engine starts. The vehicle should be serviced if the light stay on through several typical driving styles."...I checked the gas cap, it seems fine...In comparison, the Mopar "Nanny" (which I don't mind this time) is telling me I should service it now - they sent me an e-mail.

Has anyone had this light trigger on their Gladiators? What was the cause/how did it resolve/did you need to take it in for service just for this (good grief :-()?

And WTH is the "etc." they put in the manual, wish they were more specific?

Thanks for your help,
-Joe

You mean the check engine light came on? Seriously, and no offense, many have seen that and the cause is as diverse as the group of people that own these things. It's a generic "there's a problem" light and no, expecting the book to even hint as to why is asking for some really technical things most wouldn't get anyway. It's an owners manual, not the STAR library, sorry.

You are looking for a simple, this will usually fix it, reason for the CEL to be on?
There are hundreds of causes, if not thousands. It's almost like "I have a fever, tell me why" - sorry, but all it means is "the system believes there is a problem, check the CODE for more specifics" and even that doesn't give a cause - could be a misfire, some sensor was out of range, something got hot or won't get hot, injector stuck, coil pack, who knows.

Can't be more specific as it would take the whole rest of the book to list the codes and causes.
The light is generic - it simply means there's a problem.
Get a code reader or ask a parts store to scan for the trouble code, or take it to the dealer. No one here can fix it or tell you what it is, but if I get time, I could post a few hundred possible causes ;-)

Welcome to owning a post-1990 vehicle.

 

[joeym7]

You mean the check engine light came on? Seriously, and no offense, many have seen that and the cause is as diverse as the group of people that own these things. It's a generic "there's a problem" light and no, expecting the book to even hint as to why is asking for some really technical things most wouldn't get anyway. It's an owners manual, not the STAR library, sorry.

You are looking for a simple, this will usually fix it, reason for the CEL to be on?
There are hundreds of causes, if not thousands. It's almost like "I have a fever, tell me why" - sorry, but all it means is "the system believes there is a problem, check the CODE for more specifics" and even that doesn't give a cause - could be a misfire, some sensor was out of range, something got hot or won't get hot, injector stuck, coil pack, who knows.

Can't be more specific as it would take the whole rest of the book to list the codes and causes.
The light is generic - it simply means there's a problem.
Get a code reader or ask a parts store to scan for the trouble code, or take it to the dealer. No one here can fix it or tell you what it is, but if I get time, I could post a few hundred possible causes ;-)

Welcome to owning a post-1990 vehicle.

Good grief, you have to learn to stop taking every little comment about a shortcoming in the Jeep manual, the jeep design, the jeep service, as a personal offense.

It was a simple question that needed only a simple answer, not a preaching session.

I asked for folks to share their experience as to possible causes to see if there was a trend...If you don't like it too bad and move on.

 

[joeym7]

You should get a OBDII code reader and then you will know why the light is on. I have a BlueDriver which costs a little over $100. https://us.bluedriver.com/products/bluedriver-scan-tool
Other members may have their favorite readers too.

Alternatively, I think some auto parts stores (Maybe Autozone or Advance Auto?) will read the codes for free.

Here is a valuable post on the other hand...Thank you Sir, I will consider it.

 

[Gvsukids]

Good grief, you have to learn to stop taking every little comment about a shortcoming in the Jeep manual, the jeep design, the jeep service, as a personal offense.

It was a simple question that needed only a simple answer, not a preaching session.

I asked for folks to share their experience as to possible causes to see if there was a trend...If you don't like it too bad and move on.

Did you happen to look at the multiple threads already on this topic and see that there are many reasons why the light comes on? Just take it to the dealership and have them check it out, or an AutoZone will scan for free.

 

[ShadowsPapa]

There is no simple answer other than - buy a code reader, find the code, take it to the dealer.
Or save your money, don't buy a reader, take it to the dealer.
The simple answer - there is none you can do much about, take it to a dealer.
These lights have been around since the 1980s and it's gotten worse, not better, as far as what it means when they come on.


There are over 3500 P codes alone, then there are other prefix codes in the hundreds.
As suggested - go to a dealer or have a parts store scan for a code.
WARNING - parts store code readers can GENERALLY speaking, only scan for standard codes. They may not be able to understand all Jeep codes. FCA has some of their own non-standard or manufacturer's codes. I've taken a Jeep to O'Reilly's before I bought my own software and other tools for diagnostics and their response "sorry, we can only read xxx codes" -
Anything P1000 to P1999 or P3000 to P3400 will be Manufacturer specific and the part store scanners may not do any more than tell you what the code is - they won't necessarily know what the code means or translates to.

There is no shortcoming in the Jeep manual. Don't know why you would believe the book is crap. When has any owners manuals given the list of codes and their meanings and what to do about it, or a simple check list for when the light comes on. Have any of them? No.
It's an owners manual, not a technicians reference. In fact, they do a pretty good job all things considered. Because of thousands of possible codes, it's impossible to list them all.

Let's just assume the book does give you a list - "it could be...... (choose one of the below)" - would anyone know what it meant?
I fail to see why listing thousands of codes and possible malfunctions in a manual is a shortcoming.

Camshaft position (CMP) sensor A, bank 1 circuit malfunction
Fuel Injection Pump Battery Voltage Out Of Range Condition
Engine control module (ECM) -auxiliary 5 voltoutput low
Evaporative emission (EVAP) leak detection pump -pressure switch
Accelerator Position Sensor Supply Voltage Too High
Fuel Pressure Solenoid Circuit Condition
Fuel trim (FT) system too lean, bank 1



The internet is ruining critical thinking.

 

[ShadowsPapa]

Good grief, you have to learn to stop taking every little comment about a shortcoming in the Jeep manual, the jeep design, the jeep service, as a personal offense.

It was a simple question that needed only a simple answer, not a preaching session.

I asked for folks to share their experience as to possible causes to see if there was a trend...If you don't like it too bad and move on.

I guess you didn't read my whole post -

Can't be more specific as it would take the whole rest of the book to list the codes and causes.
The light is generic - it simply means there's a problem.
Get a code reader or ask a parts store to scan for the trouble code, or take it to the dealer. No one here can fix it or tell you what it is, but if I get time, I could post a few hundred possible causes ;-)

 

[joeym7]

There is no simple answer other than - buy a code reader, find the code, take it to the dealer.
Or save your money, don't buy a reader, take it to the dealer.
The simple answer - there is none you can do much about, take it to a dealer.
These lights have been around since the 1980s and it's gotten worse, not better, as far as what it means when they come on.


There are over 3500 P codes alone, then there are other prefix codes in the hundreds.
As suggested - go to a dealer or have a parts store scan for a code.
WARNING - parts store code readers can GENERALLY speaking, only scan for standard codes. They may not be able to understand all Jeep codes. FCA has some of their own non-standard or manufacturer's codes. I've taken a Jeep to O'Reilly's before I bought my own software and other tools for diagnostics and their response "sorry, we can only read xxx codes" -
Anything P1000 to P1999 or P3000 to P3400 will be Manufacturer specific and the part store scanners may not do any more than tell you what the code is - they won't necessarily know what the code means or translates to.

There is no shortcoming in the Jeep manual. Don't know why you would believe the book is crap. When has any owners manuals given the list of codes and their meanings and what to do about it, or a simple check list for when the light comes on. Have any of them? No.
It's an owners manual, not a technicians reference. In fact, they do a pretty good job all things considered. Because of thousands of possible codes, it's impossible to list them all.

Let's just assume the book does give you a list - "it could be...... (choose one of the below)" - would anyone know what it meant?
I fail to see why listing thousands of codes and possible malfunctions in a manual is a shortcoming.

Camshaft position (CMP) sensor A, bank 1 circuit malfunction
Fuel Injection Pump Battery Voltage Out Of Range Condition
Engine control module (ECM) -auxiliary 5 voltoutput low
Evaporative emission (EVAP) leak detection pump -pressure switch
Accelerator Position Sensor Supply Voltage Too High
Fuel Pressure Solenoid Circuit Condition
Fuel trim (FT) system too lean, bank 1



The internet is ruining critical thinking.

​

Yea, you forgot the first thing the manual mention as a likely cause "Bad Gas", it was 1 of only 2 they mention so they must think it is a high likelihood. It is also something that effects people too and something you may want to get checked for after your 2 posts in this thread. -LOL!

 

[joeym7]

Did you happen to look at the multiple threads already on this topic and see that there are many reasons why the light comes on? Just take it to the dealership and have them check it out, or an AutoZone will scan for free.

Thanks for your post, I am very familiar with the concept of an engine warning light, I get them on my STS from time to time and they go away on their own after some driving.

The difference is my STS is 20 years old so these "events" are not very remarkable...On the other hand, my Jeep is less than 1 year old and has a miniscule amount of miles (it is my pleasurer craft ). Even folks who think Jeep can never do any wrong would have to admit, engine warning lights on such a low mile vehicle is an anomaly/not normal. So it made sense to me to see if there where any trends others where having in this regard, or there could have even been some sort of recall notice...If what others have experienced - like say "bad gas" (which seems to be common in more ways than 1 - lol) it would help me avoid a trip to the dealer. Or if other things which go away on their own, no dealer for me.

That is the point of this thread. I think it is very reasonable approach short of having my own Code Reader (which I am considering getting).

 

[Gladi_md]

My 2022 Gladiator CEL came on at 1345 miles and the dealership said it was a o2 sensor and replaced. Worked great for another 1200 miles and it was back on, flashing by this time. Back to the dealership and this time they said o2 sensor and fuel rail issues. There was an update bulletin for the trans PCM via a flash update. Had her back for a few days and she seems to be working.

my symptoms usually start when crawling in bumper to bumper traffic. When going highway speeds, no issues.

@JeepCares might be of some help. I am hoping the PCM update fixes mine. I’ve had her since September 1st and she has been in the shop for 18 days.

 

[Barnaby’sdad]

My CEL (‘22 JTR 3.6) came on a few times between ~800-2,000 miles. I have a code reader, but was never able to pull any codes.

It’s been ~2,000 miles since I’ve seen the CEL. IIt just went away on its own. I’ll take it to the dealer if something pops-up that appears to be repeatable.

 

[joeym7]

My 2022 Gladiator CEL came on at 1345 miles and the dealership said it was a o2 sensor and replaced. Worked great for another 1200 miles and it was back on, flashing by this time. Back to the dealership and this time they said o2 sensor and fuel rail issues. There was an update bulletin for the trans PCM via a flash update. Had her back for a few days and she seems to be working.

my symptoms usually start when crawling in bumper to bumper traffic. When going highway speeds, no issues.

@JeepCares might be of some help. I am hoping the PCM update fixes mine. I’ve had her since September 1st and she has been in the shop for 18 days.

Thanks for your post, informative...So unfortunate these Awsome Trucks have these issue NOOB...

On mine, unless the indicator starts blinking, or I get some other symptom which might be related I am going to wait 20-40 miles. I found a number of dealerships which have posted about this indicator and they say if it is a transient event the indicator should clear in 20-40 miles...If mine doesn't at that time then I'll bring it in.

 

[joeym7]

My CEL (‘22 JTR 3.6) came on a few times between ~800-2,000 miles. I have a code reader, but was never able to pull any codes.

It’s been ~2,000 miles since I’ve seen the CEL. IIt just went away on its own. I’ll take it to the dealer if something pops-up that appears to be repeatable.

Thanks for your post, that is the strategy I am going to use if it doesn't clear after 40 miles.

 

[Barnaby’sdad]

Thanks for your post, that is the strategy I am going to use if it doesn't clear after 40 miles.

It’s been on for 40 miles? Run to any auto parts store. They should be able to pull the code(s).

You’ve got the exact opposite issue that I did. My issue was that the light would never stay on long enough to do anything with it…and the code didn’t store for me to be able to pull it.

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