A software bug can leave the tire pressure warning light dark on 201,976 Jeep and Wagoneer SUVs even when a tire has run dangerously low, according to a recall Stellantis filed with federal regulators this month. The recall, filed with the National Highway Traffic Safety Administration as campaign 26V559, covers Jeep and Wagoneer models from the 2024 through 2026 model years.
Federal rules have required tire pressure monitors on new vehicles since the mid-2000s specifically because underinflated tires raise the odds of a blowout, generate excess heat and wear unevenly, and a system that fails silently defeats the purpose of having one at all. The recall covers vehicles built over roughly three model years, which is why Stellantis is treating it as a single software campaign rather than a narrow production-line fix.
A Radio Frequency Hub error blinds the tire sensors
The fault lives in the Radio Frequency Hub module, a component supplied by Valeo North America that processes the signals from each tire’s individual pressure sensor. Software in that module can lose track of the reference pressures it needs to recognize when a tire has dropped below the safe threshold, so the system neither logs the drop nor lights the dashboard warning. NHTSA’s recall report warns that “a TPMS that is unable to warn a driver of tire pressures outside of recommended limits can cause a vehicle crash without prior warning,” and notes the defect also puts the vehicles out of compliance with Federal Motor Vehicle Safety Standard 138, the regulation that mandates the warning system in the first place.
Unlike some tire-pressure complaints, this one gives drivers nothing to notice in the moment. The defect prevents low-pressure detection and warning light activation entirely, so a driver relying on the dashboard would have no reason to suspect a tire needed air until the vehicle already felt or sounded wrong on the road. Some owners may instead see an unrelated service message or a dash icon replaced with blank or dashed readouts once the module’s software gives out, rather than any warning that specifically calls out low pressure.
The Radio Frequency Hub reads a pressure sensor mounted in each of the vehicle’s four wheels and reports the values back to the instrument cluster continuously while the vehicle is running. When its software loses the stored reference pressures, it has no baseline left to compare a live reading against, which is why the failure shows up as silence rather than a false alarm.
Seven Jeep and Wagoneer nameplates, three model years
The recall’s scope runs wider than a single model. NHTSA’s filing breaks the total down by nameplate: 113,647 Jeep Grand Cherokees, 57,456 Grand Cherokee L models, 16,456 Jeep Wagoneers, 9,749 Wagoneer L models, 3,046 Grand Wagoneers, 1,094 Grand Wagoneer L models and 526 Grand Cherokee PHEVs, along with a handful of 2026 Cherokee and Grand Wagoneer L PHEV units caught in the same software build. All told, the affected vehicles span the 2024, 2025 and 2026 model years, reflecting how long the flawed Radio Frequency Hub software had been running before anyone caught it.
Three root causes, confirmed a year after testing began
Stellantis did not find the problem all at once. According to Bizzycar’s account of the internal investigation, engineers opened their inquiry in August 2025 and identified the defect’s causes in stages, isolating one contributing software issue between December 2025 and March 2026 and a second between May and July 2026. The company’s Vehicle Regulations Committee did not formally confirm the noncompliance until August 26, 2026, more than a year after testing first turned up the anomaly.
Stellantis has not issued a “park outside” or “do not drive” advisory alongside the recall, and the recall notice frames the risk as a loss of warning rather than an immediate mechanical failure, meaning the vehicles remain drivable while owners wait for the fix. The remedy itself is a free reprogramming of the Radio Frequency Hub module at a Jeep dealership, requiring no replacement parts and, according to the company, no meaningful downtime beyond a standard service visit.
Until a dealer reprograms the module, Stellantis is advising owners of the affected Jeep and Wagoneer models to check their tires with a physical gauge rather than trust the dashboard light, since the software fault means the warning system may show nothing wrong even when a tire has run low. The reprogramming itself takes a fraction of the time of a typical software recall, since it touches only the Radio Frequency Hub and not any of the vehicle’s other control modules.
Dealers began receiving notice of the recall on September 9, more than three weeks before owner notification letters are scheduled to go out between September 29 and October 21, a staggered window Stellantis is using to phase owners into service appointments rather than sending every letter on the same day.
This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.
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