Cronic o2 sensor failures

[articcatbill]

I will try to keep this brief, I bought a 2024 Gladiator Rubicon in May 2024. It eats through o2 sensors somewhat regularly. Just seeing if anyone else had had this constant issue and if there was a repair that worked:

• 9/12/24 2345 miles, Check engine light, P0052 and P0152 codes. They eventually replace all 4 o2 sensors and reprogrammed the PCM per TSB 18-065-24.
• 12/22/25 13,663 miles, Check engine light, P0052 and P0152 codes. Replaced PCM and flashed PCM, replaced 1 o2 sensor.
• 07/14/26 18952 miles, Check engine light, P0052 and P0152 codes. Replaced Drivers side Cat and both upstream and downstream sensors. Had scoped cat and saw debris in the cat.
• 8/26 20200 miles, Check engine light P0052 and P0152 codes. They have had it over a week replacing the engine wiring harness. Had to order an additional sub harness.

Love the Jeep, really do, but not to happy with all the issues going on. Any thoughts? Anyone see this, have a repair? Not thrilled with the engine harness swap happening, I can just see electrical gremlins down the road.

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[DylanM]

Seeing as how the problem has consistently stayed with sensor 2/1 heater circuit high and 2/1 signal circuit high faults despite all the parts that have been replaced thus far, I'd say there's a very good chance the real problem from the beginning has actually been the wiring. Intermittent wiring faults can be a real bastard to track down sometimes, I wouldn't be overly concerned with the fix process you're experiencing.

One other thing to look for that you didn't mention, is there is a known issue on the 3.6 where oil leaks (typically from the valve covers) can seep into and foul the connector where the o2 sensor plugs into the harness.

 

[SaiintNick]

I had a failed o2 sensor on my Wrangler. It died as I pulled into the dealership. I left with my Mojave.

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