2020 Jeep Grand Cherokee: Engine running rough engine light on
Common wear/failure (not a recall)
Symptoms
Owners of the 2020 Grand Cherokee report: engine running rough engine light on. CarComplaints.com lists 2 owner complaints, average mileage 21,900 miles.
NHTSA has 56 owner complaints for the 2020 Grand Cherokee in this area. Examples:
- NHTSA complaint ODI #11755756 (filed 08/09/2026): “I am submitting this complaint to report a serious safety concern involving my 2020 jeep grand cherokee. at approximately 44,000–45,000 miles, the vehicle suffered a catastrophic engine failure. this was extremely alarming considering the relatively low milea…”
- NHTSA complaint ODI #11755784 (filed 08/09/2026): “On the 26th of april 2026, the transfer case on my 2020 grand cherokee (with less 114,000 miles) failed during highway travel. this resulted in a sudden downshift and temporary deceleration followed by illumination of “service 4wd” display. a short time af…”
Likely causes
Sources do not establish a single root cause; diagnosis is needed. Owner-reported fixes are listed below.
Fix, in plain English
Most common owner-reported solutions on CarComplaints.com: replace camshaft and rocker arms (1 reports) replace the engine (1 reports). Check for open recalls and extended warranty coverage with a dealer before paying out of pocket.
DIY difficulty: Pro
Internal engine work (lifters, oil consumption, fuel dilution diagnosis) requires engine teardown or dealer software/tests. (Our assessment.)
Cost
CarComplaints.com owners report a typical repair cost of about $1,680 (owner-reported average, not a quote).
Typical parts (search links, no affiliate codes)
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