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When the 2016 Chevy Malibu presents the P2138 OBD-II trouble code, it indicates a voltage issue with the throttle pedal position. To address this problem, it is recommended to have a professional inspect either the throttle body motor or the throttle body assembly. If significant problems are found in these components, replacing the entire part may be necessary. However, in many instances, the issue can be resolved by examining the connecting cables. Faulty sensors can also trigger trouble codes, and replacing them may be a suitable solution. Once these components are repaired or replaced, the trouble code should no longer be a cause for concern in the vehicle.
The code p2138 on a 2016 Chevy Malibu signals that there is a voltage issue detected by the throttle pedal position sensor.