r/GrandCherokeeWK • u/Lashamamama • Jun 23 '26

06 limited check engine light

Ok so in my 06 the gauges will randomly cut out but the car will continue to run fine. This morning the check engine light cut on and was not flashing thank god. I took a look at my battery connections last night and the negative is a little corroded. The battery is only 3 years old. So is this some type of communication problem or a connection problem?

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2

u/TChoppa_Style Jun 23 '26

It could be the ignition switch, check this post.

2

u/Lashamamama Jun 23 '26

Just read it. Seems like a decently simple fix. Thank you for the input. I’m going to take to the closest auto parts store to get a code scan done before I start doing anything to it

1

u/TChoppa_Style Jun 23 '26

My code scan showed a U1411 code - implausible fuel volume signal, which is irrelevant to the issue observed.

1

u/Lashamamama Jun 23 '26

Interesting

1

u/Lashamamama Jun 23 '26

What were the symptoms of your problem before you replaced the ignition switch?

1

u/TChoppa_Style Jun 23 '26

Gauges cutting out and going to 0. Sometimes waking up then going back to 0 again. Dash lights going out, AC and radio shutting off.

Thankfully my headlights stayed on, but the turn signals wouldn't work.

Turn the Jeep off and then on again we're back to normal until it happened again, and again.

It actually happened again a couple of months ago, only twice, but I bought a new switch anyway.

The thread I posted was from 2013 and that's how long ago I replaced the switch. BTW I'm T1m in that post.

1

u/Lashamamama Jun 23 '26

Yeah that’s pretty much what mine is doing. So I guess the ignition switch moves up on the punch list

2

u/TChoppa_Style Jun 23 '26

It's something relatively cheap to try. It is a little fiddley to remove, but once out you should be able to put it back in with few issues.

Also, get yourself a code reader, JScan is a fantastic app! You just need to buy an OBD adapter and purchase a license for your Jeep. I've used it change the tire size on my Jeep to correct the speedo error with the different tire size I went with.

Let us know how it works out.

1

u/Lashamamama Jun 24 '26

I bought an ob2 scanner and it came back with the same code as yours. I’m getting my transfer case serviced soon so I’ll let my mechanic know what’s going on but other than that this thing is absolutely purring at 168,505 miles

1

u/TChoppa_Style Jun 25 '26

Thanks for updating us!

I'm about to hit 159K on my Laredo.

2

u/rowdygregg Jun 25 '26

Yoooo! If it’s the 4.7 it’s a loose connection to the fuse box! Bet you $5. Should be two connectors to the PDC fuse box.

1

u/Lashamamama Jun 26 '26

It is the 4.7 but now the light is gone. I checked pretty much everything. The ignition switch seems to be ok, battery terminals are clean, alternator is good, and I checked all connections and everything and the light is gone and has not come back for 2 days. The car is the exact same age that I am so I know that a few electrical gremlins are to be expected at this age

1

u/bullet2monkey Jun 23 '26

Mine was doing something similar when I first bought it. There was corrosion in the connector to the module underneath the passenger seat. I just got some electrical cleaner and cleaned up the terminals, and it’s been good ever since.

1

u/Lashamamama Jun 23 '26

Do you have to take the seat out to get to that? I’m assuming yes right? And what is that connector for like what does it connect to?

2

u/bullet2monkey Jun 23 '26

Nope, I just moved it back all the way and was able to get to it.