Some 2022 Maverick vehicles equipped with a 2.5L full hybrid electric vehicle (FHEV) powertrain built on or before 9-Mar-2022 may exhibit an idle surge and/or rough idle with high temperature in the catalytic converter and/or sulfur odor in the cab. This condition occurs when the high voltage battery is being charged by the engine at cold start and the state of charge (SOC) increases to the top of the charge limit. When the SOC is at the top of the charge limit the system cuts the engine injectors until the SOC is below the top limit to protect the battery. The continuous cycle of running the engine and cutting the injectors causes an increase of oxygen and a high temperature in the catalytic converter. To correct this condition, follow the Service Procedure to reprogram various modules starting with the powertrain control module (PCM).
