P26E4 code on brand new Mojave

[IPRoutes]

Just bought a new Mojave from the dealer lot Saturday night.
After a couple of miles driving towards home, noticed I had a Service Stop/Start and CEL light on.
I called my salesman and he wanted to drive back to the dealership (it was closing time).
He found the fuel cap was not closed. He tightened it and I drove back home. After starting the Jeep, the ESS error was gone but was showing Stop/Start not ready - understandable, probably the battery needs more charging. The CEL remained on. As soon as I got home, used my Scangauge to check the code. Found one code stored - P26E4.

I cleared the code, and took out in the night for a test drive. ESS still shows Stop/Start not ready (A?C running as well as lights on). CEL did not turn on.

Anyone saw this code on their JTs? Is it associated with fuel cap not connected? My research shows the code is for Starter relay malfunction.

Strange. I will update again later today.

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[IPRoutes]

I also checked the fuses/relays. Two or three made a clicking sound as I pushed them back in.

 

[ZoMojave]

Now clear the codes again.

That was the first thing I did with my JT. I pushed all the fuses in the same day it came off the truck and before I took delivery. I found a couple not fully seated.

 

[IPRoutes]

I cleared the code after pushing back the fuses.

 

[Maximus Gladius]

Hopefully clearing it for good is just as simple as seating the fuses. My 21 JTR fuses were loose and all needed to be pushed down. I did that back in 21 and now jump ahead to now, I upgraded the batteries and while the fuse tray was out, the fuses were loose again, so pushed them all in again.

Concerning the Start/Stop thing, I found the computer system just needs to “settle in” each time you start the vehicle and go. Where the start/stop was working before, during your drive, then you park it and go shopping or you’re home for the night and then you’re off again in the truck and “it’s not ready”…why?? It was fine before and now it isn’t….give it a while and after the 20th stop light you come to, the engine shuts off…what the heck??

It’s the batteries or maybe in your case, the wiring harness isn’t right. I’m not so sure your batteries were fully charged. From the time the batteries were made and sat on the shelf, then put in the truck and maybe were used to start the truck a dozen times before you got it and drove away, the voltage is down a lot I’d bet, and they need to be taken out and recharged independently, the IBS (intelligent battery sensor) rebooted and everything put back. You’ll be good to go


Congrats on the new ride!

 

[Maximus Gladius]

These AGM (absorbent glass mat) batteries also need an AGM charge system, just in case you didn’t know. It was a detail I missed when I first clamped on a charger on mine.

 

[IPRoutes]

https://www.obdiicode.com/what-is-obd-ii-code-p26e4-starter-relay-b-circuit/

 

[IPRoutes]

I’m not so sure your batteries were fully charged. From the time the batteries were made and sat on the shelf, then put in the truck and maybe were used to start the truck a dozen times before you got it and drove away, the voltage is down a lot I’d bet, and they need to be taken out and recharged independently, the IBS (intelligent battery sensor) rebooted and everything put back. You’ll be good to go


Congrats on the new ride!

After driving about 20 miles this morning, the ESS is working fine now. No CEL or ESS error messages. Looks like the batteries needed some charge causing the error code.
Or it may have been a combination of some loosely seated fuses/relays and batteries not having sufficient charge with the truck sitting around and short distance test drives running on full A/C.
So far so good - knock on wood.

 

[IPRoutes]

I think I may have found the root cause of the problem with some arm chair thinking.
When I test drove, everything was shipshape. Then during negotiations I told them that I will not be paying for dealer installed options like Karr alarm or Nitrogen in tires (78% Nitrogen in the air anyway) to reduce the price.
When they took it for final detailing, they disconnected the alarm without taking all the precautionary steps and triggered the CEL. Since the code P26E4 which was thrown had to do with starter relay and I also got the "Service Stop/Start" at the same time, it all adds up since the code has more correlation with the Karr alarm than fuel cap not placed properly.
Makes sense?

 

[Maximus Gladius]

I think I may have found the root cause of the problem with some arm chair thinking.
When I test drove, everything was shipshape. Then during negotiations I told them that I will not be paying for dealer installed options like Karr alarm or Nitrogen in tires (78% Nitrogen in the air anyway) to reduce the price.
When they took it for final detailing, they disconnected the alarm without taking all the precautionary steps and triggered the CEL. Since the code P26E4 which was thrown had to do with starter relay and I also got the "Service Stop/Start" at the same time, it all adds up since the code has more correlation with the Karr alarm than fuel cap not placed properly.
Makes sense?

Makes sense to me.

 

[ShadowsPapa]

I wonder how long it sat and how low the batteries got just sitting there. Most dealer test drives won't even begin to charge batteries back up.
Can't hurt to be SURE they are 100% to start with.......... give them a fair chance at survival.

Sad to see the stuff dealers pile on the unsuspecting public - nitrogen in car and pickup tires is a joke. Most of the alarm and theft tracking things are subscription so you pay and pay and pay. making it worse - I've seen how some of that crap is wired in, spliced wires and more. Ugh.

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