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Washington — Chrysler Group LLC said Thursday it is recalling 33,443 trucks and SUVs in two separate campaigns to prevent false warnings from Tire Pressure Monitor systems.

The unit of Fiat Chrysler Automobiles NV is unaware of any injuries or accidents in connection with either recall. The first covers 23,000 2014 Ram ProMaster full-size vans, while the other includes 10,390 2014 Jeep Wrangler SUVs and Dodge Grand Caravan/Chrysler Town & Country minivans. All are in the United States.

The Ram ProMaster recall will upgrade software that helps TPM sensors recognize from which tire the pressure data is coming. Absent such capability, a warning light may falsely signal that tire pressure is low. And if the light is already activated, the system may not properly alert vehicle occupants if tire pressure actually becomes low.

The second campaign will reconfigure a TPM module to disable a test mode that was inadvertently left on following shipment from the supplier. When installed in a vehicle, a TPM module configured this way may not get accurate tire-pressure readings, which could result in a false warning.

Owners of all vehicles implicated in the two recalls will be notified in November.

Chrysler has recalled nearly 5.2 million vehicles in 29 U.S. recall campaigns this year, up from 4.7 million vehicles in 36 campaigns in the United States last year. Chrysler has recalled nearly 6.5 million vehicles in 35 global recalls.

Chrysler says it is responding “quickly and proactively to problems, evidenced further by the fact that eight of our 27 U.S. campaigns were launched before we received a single complaint.” Of all the vehicles recalled in the United States, there are reports of three injuries related to the callbacks and no deaths. Chrysler also says its recall completion rate is nearly 80 percent, above the industry average.

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