16,385 Ram 1500 pickups failed a tire-pressure safety standard because the sensors miss low tires

Chrysler has told federal safety regulators that 16,385 of its 2026 Ram 1500 pickups carry a tire-pressure monitoring system that may not do its one job. Under recall 26V623000, the trucks fall short of Federal Motor Vehicle Safety Standard 138, and owner notification letters are scheduled for October 27, 2026.

What the recall record says about the Ram 1500 monitors

The filing is blunt about the defect. Its subject line reads “Tire Pressure Monitor System May Fail/FMVSS 138,” and the vehicle list names a single group: “2026 Ram 1500 vehicles.” Nothing in the record points to older model years or to other Ram trucks, so the exposure is limited to the 2026 model year of the full-size pickup. The filing does not break the count down by trim, build week or tire size, which means an owner cannot tell from the published totals alone whether a particular truck is among the 16,385.

The potentially affected count is 16,385 vehicles, according to the National Highway Traffic Safety Administration recall data for the campaign, which the agency publishes through the Department of Transportation’s open recalls dataset. That count is a ceiling set by the manufacturer’s own filing, and recalls routinely find that only a share of the covered vehicles actually carry the fault.

The consequence statement is the heart of the document. In the manufacturer’s words, “A TPMS warning light that fails to notify the driver of low tire pressure increases the risk of a crash.”

FMVSS 138 and the 20-minute rule

The standard exists because a soft tire is hard to see and easy to ignore. Federal Motor Vehicle Safety Standard 138, written into federal regulations at 49 CFR 571.138, requires the low-pressure telltale to light when pressure in as many as four tires drops to a set threshold. That threshold is the higher of two numbers: 25 percent below the manufacturer’s recommended cold inflation pressure, or a minimum activation pressure listed in a table of the rule. For standard-load passenger tires, that table value is 140 kilopascals, or 20 psi.

Timing is part of the test. The telltale has to come on no more than 20 minutes after pressure reaches the threshold. A system that stays dark, or lights too late, is out of compliance even if every sensor is otherwise working.

Chrysler’s filing says the Ram 1500 monitors can fail that requirement. The practical meaning is that a truck could be rolling on a badly underinflated tire while the dashboard shows nothing, which is the exact situation the rule was written to prevent. A recall under this standard is a different kind of problem from a part that wears out: the regulation sets a pass-fail bar for the warning system, and the manufacturer has concluded that these trucks may not clear it. The record frames the risk in terms of the driver never being told, not in terms of the tire itself failing on its own, so the hazard grows with every mile driven on pressure the driver does not know about.

Why a missed warning matters on a heavy pickup

NHTSA has long described the monitors as a backstop rather than a replacement for attention. On its tire safety page, the agency says “Underinflated tires are visually difficult to detect,” and it recommends checking pressure monthly with an accurate gauge. It also warns that the system is “not intended to be a substitute for regular tire maintenance,” and notes that inadequate air pressure can lead to a flat tire or a blowout.

That guidance carries more weight when the monitor itself is the suspect. Drivers who trust a dark dashboard to mean healthy tires have no second signal, and a full-size pickup that is loaded, towing or running at highway speed leaves little margin when a tire fails. A blowout at speed can pull the vehicle toward the shoulder or an adjacent lane, and a driver who had no earlier warning has no chance to slow down, pull off and add air before the failure arrives.

Until a repair is performed, owners of 2026 Ram 1500 trucks can lean on the old habit the agency recommends: a monthly cold-pressure check, compared against the figure on the vehicle’s tire placard. It costs a few minutes and a cheap gauge, and it catches slow leaks, nail punctures and the gradual loss that comes with a temperature drop in autumn, all of which a healthy monitor would also flag. The difference in this recall is that nobody can be certain the flag will come.

Owners who want to confirm whether a specific truck is included can enter the 17-character vehicle identification number at NHTSA’s recall lookup. The agency says that owners who receive a recall notice should contact a local dealership to have the recalled part fixed for free, and that a newly announced recall may not list every affected VIN right away, so repeat checks make sense over the coming weeks.

The recall record read for this report does not spell out the remedy or the repair schedule, so those details are best taken from the letters that begin arriving on October 27, 2026, or from a dealer once parts and procedures are confirmed.

This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.

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