pretty bad
Typical Repair Cost:
No data
Average Mileage:
20,100 miles
Total Complaints:
7 complaints

Most Common Solutions:

  1. not sure (2 reports)
  2. replaced engine (1 reports)
  3. replaced gaskets, seals, camshaft, cylinders, manifold, plug (1 reports)
  4. reset code (1 reports)
  5. reset code and reprogrammed pcm w/updated software (1 reports)
  6. reset code, software updated for pcm and tcm (1 reports)
2020 Jeep Gladiator engine problems

engine problem

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2020 Jeep Gladiator Owner Comments

problem #7

Nov 102021

Gladiator Rubicon 3.2L

  • Automatic transmission
  • 47,744 miles


This vehicle is used to do long distance driving between Alberta and BC. It started with an engine tick, engine light comes off and on. Then the Jeep wouldn't even move or shift up hill that fast. Got it into the shop. Diagnosed for cylinder #5 missfire. The shop pulled it apart to find more wrong. Following repairs done on the passenger side:

Monitored misfire data, found cylinders 2 4 and 6 all misfiring continuously. Removed upper intake manifold. Removed cylinder 4 ignition coil and spark plug, confirmed condition and gap, 0.043" Reinstalled upper intake manifold. removed both front 02 sensors, Ran vehicle and monitored misfire data, continual misfire on even cylinders still apparent, starts with cylinder #2 which was always a few misfires more than 4 and 6. Reinstalled. Performed and documented fuel injector actaution and fuel pressure readings. 1- 396.00 KPA to 395.438 KPA. 2- 395.438 KPA to 394.50KPA. 3- 394.50KPA to 392.875KPA. 4- 392.875KPA to 391.156KPA. 5- 397.141- 396.297KPA. 6- 398.875- 397.141KPA. Called Techline, Advised to remove cylinder head cover and inspect for mechanical damage. Removed upper intake plenum. Drained coolant. Removed EGR cooler. Removed left side cylinder head cover. After removal of cylinder head cover and inspection found all 6 exhaust hydraulic lash adjusters on left side spongy, not firm and can slightly compress. Removed left side exhaust camshaft, replaced all lifters. Reinstalled all removed components. Filled cooling system. Ran vehicle and confirmed noise from left side no longer apparent. Started and monitored, cylinders 2,4 and 6 still missing consistently, code P0300 active, LT fuel trim on right side +32, Left side -2. Talked to techline and advised to remove right side cylinder head. Drained coolant. Gained access to and removed right side cylinder head cover. Inspected and found all main cam lobes on intake camshaft grounded down, suspect hardening on intake camshaft failed. Removed and replaced right side intake camshaft

This took 2 months to complete

- borncdn, Erskine, AB, Canada

problem #6

Aug 292022

Gladiator Sport S 3.6L V6

  • Automatic transmission
  • 57,000 miles

All started with the p301 code. Looked it up and said most common fix was coil packs and spark plugs. So not knowing any better we ordered them and spent all day labor day replacing them. Put everything back together. Drove it around the block and BAM... P300, P305, P301, and even got a p420 code at one point on a trip to work one morning. Sometimes it throws it into limp mode. Let me tell u what that's like at 70 mph on i10 in 500 traffic. Not worth a damn. Luckily didn't cause an accident. Did some more research and found out that there is a bulletin from FCA on this issue. So I contacted a dealership to get it in to try to get it fixed. (This is our daily driver to and from work. 1hr and 1/2 one way 6 days a week). Shop refreshed liquids and we picked it up the next day. Didn't get a half a block and the dreaded code again.

I called them the next morning and said they can't get it in for 3 weeks. So called a dealership closer to home and they could get it straight in. Called to check on it and they didn't have the right info on codes. Apparently didn't read the codes. Gave them all the codes again. Over a 2 week span, calls back and forth, it still is not fixed.

They said compression checked out fine, spark plugs are fouled. We told them there is a bulletin from FCA on this issue. Service manage said we got that from a forum. That bulletin comes straight from FCA website. He proceeded to tell us that he has never seen this issue in his shop. (Newer dealership) First mistake. They are just getting started. When we put the coil packs in all we could get was aftermarket. He said the coil packs were creating TOO MUCH spark. Ummm no. That's not how that works. Fuel isn't being burned right to create a misfire. We couldn't tell this guy anything.

According to federal trade commission they MUST prove that they caused the issue. They wanted to charge us 1200.00 to put back to oem. GD. 85 a pack. Msrp. We can get them for 55. He proceeded to tell us that we need to come pick up the jeep and didn't want to business with us anymore. (We have done lots of research on this) We ain't stupid LMAO. He didn't like the fact that he couldn't fool us. So picked up the jeep on 9/27/22. While driving it home the p300 code came up again. Big surprise. I found the oem packs and have them coming. So this weekend we will change them out AGAIN. when the code appears again we will take it back to jeep for the 3rd time. We are paying damn good money for a vehicle that we can't even drive.

- Debra W., Lake Charles, LA, US

problem #5

Oct 172020

Gladiator Rubicon 3.6L V6 With Max Tow

  • Automatic transmission
  • 8,346 miles

Jeep has had the vehicle five times now for same issue. There is less than 1000 miles on a new factory engine with same engine cylinder multiple misfire code P0300. ESS also showing need service message. Jeep case number 77492058.

Service department has had the vehicle for a total of 44 days on this issue since March 17, 2020 (5 visits) unless you count the three days they needed to repair hood damage while replacing the engine. Their body shop did repair and paint the hood.

- Patrick G., Katy, US

problem #4

Sep 152020

Gladiator Rubicon 3.6L V6 With Max Tow

  • Automatic transmission
  • 7,424 miles


Jeep is running out of options with the consistent problems continuing. Cylinders 2, 4 and 6 misfiring, all on the left side. Cylinder #2 was found to be scored. Got vehicle back after 10 days. Jeep case number 77078570. Requested vehicle replacement verbally, which was sent to a committee and denied due to engine replacement.

Jeep closed case number.

- Patrick G., Katy, US

problem #3

Jul 292020

Gladiator Rubicon 3.6L V6 With Max Tow

  • Automatic transmission
  • 7,230 miles

Service department had the vehicle for 30 days attempting to resolve the third time this has occurred.

Jeep did reimburse me for one month payment after sending billing statement for proof of amount.

- Patrick G., Katy, US

problem #2

Jul 142020

Gladiator Rubicon 3.6L V6 With Max Tow

  • Automatic transmission
  • 7,071 miles

Second time for this issue. Returned vehicle to me in two days.

- Patrick G., Katy, US

problem #1

Mar 172020

Gladiator Rubicon 3.6L V6 With Max Tow

  • Automatic transmission
  • 5,622 miles

Jeep service department could not duplicate the problem after resetting code. Returned vehicle to me after 2 days.

- Patrick G., Katy, US

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