Two Jeeps and the Pacifica Hybrid are being recalled, for different reasons.

First, the easy one: 2019 Jeep Cherokees with the 2.4-liter four-cylinder engine have “improper” transmission calibration, which may cause stalling. The fix is re-flashing the transmission, in a recall coded UA9 and slated to start by December 8. Around 100,000 Cherokees are involved. Thanks to a stall in a Cherokee with an active data recorder, the company found the problem and developed a solution. There have been 86 customer reports, 46 field reports, and over a hundred other related records, but no known accidents or injuries related to the issue.

“Certain” front wheel drive 2017-18 Jeep Renegades with the 2.4 liter flex-fuel engine (which can take 85%-ethanol, or E85, as well as gasoline) may lose fuel pressure due to a flaw in the pump assembly. Most people may never encounter the problem, which requires high power demand and either high altitude or high ambient temperatures. The recall, coded UB2 and starting December 6, 2018, has dealers replacing the fuel pump.

For those of you obsessed with technical details, the problem was first discovered by FCA US in March 2018 from warranty data — one fleet buyer was having fuel pumps replaced. FCA US, FCA Italy, and the supplier worked together to discover that a problem with the sintered metal pump impeller may have affected fuel pressure; a Tier 2 supplier had deviated from the correct sintering process. A long period of testing followed, during which the timeframe of the process problem was isolated. There have been no less than 145 warranty claims based on the problem, but no accidents or injuries. While it only affects 21,104 Renegades in the US, the recall is global in scope; and the Renegade is quite popular around the world.

chrysler pacifica hybrid limited

Finally, the 2017-18 Chrysler Pacifica Hybrid may not restart the engine properly after operating as an all-electric vehicle; unburned fuel could reach the hot catalyst and cause a fire. The fix for this problem is updating the firmware and, if needed, replacing the catalytic converter. This recall, coded U94, is also slated to start by December 8, and affects just 10,000 vehicles in the US, and presumably a scattering elsewhere.

This only affects Pacificas made from August 16, 2016 to August 7, 2018. The problem was apparently caused by a poorly coded response to another recall. Specifically, when the gasoline engine restarts after the minivan’s been in full-electric mode, it may synchronize 360° out of phase, undetected by the firmware, so that the electric motor would keep spinning the engine while the ignition was kept off. In short, the fuel would be fed into the gasoline engine, but not ignited. The fix appears to be detection and resolution of this problem by the firmware.

The recall was spurred by three engine fires in minivans which had been through Recall U73. An investigation was opened on October 3, the root cause found on October 8, and the recall approved on October 12. There have been 16 field reports related to the issue.