Chevrolet Malibu fuel injector and O2 sensor issue with codes P3055 and P3056 causing stalling and battery drain on Chevrolet Malibu

Some Chevrolet Malibu owners report experiencing issues with fuel injectors and O2 sensors, which can lead to diagnostic codes P3055 and P3056, resulting in stalling and battery drain. These problems may manifest as a misfiring cylinder and a check engine warning light due to a malfunctioning fuel injector. Additionally, issues with the oxygen sensor can disrupt the air-to-fuel ratio, further affecting engine performance and causing stalling. The specific codes P3055 and P3056 are associated with the DC/DC converter and battery sensor module, which can impair the vehicle's auto start-stop function. Possible causes for these codes include a faulty DC/DC converter actuator, damaged wiring or connectors, or complications with the powertrain control module. Timely diagnosis and repair are crucial for maintaining optimal vehicle functionality and preventing further issues.