Archives: DTC Codes

What Does Code P0780 Mean? The OBD-II diagnostic trouble code P0780, often interpreted as “Shift Malfunction,” indicates that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected an anomaly in the automatic transmission’s ability to execute a commanded gear shift correctly. Unlike codes that specify a particular gear ratio error (e.g., P0731 […]

What Does Code P0781 Mean? DTC P0781 signifies a detected “1-2 Shift Malfunction” within the automatic transmission system. The Powertrain Control Module (PCM) or Transmission Control Module (TCM), which are often integrated or communicate extensively, monitors the rotational speed of the transmission’s input shaft (turbine speed sensor) and output shaft (vehicle speed sensor or output […]

What Does Code P0782 Mean? DTC P0782 indicates a malfunction in the transmission’s 2-3 shift operation. The Powertrain Control Module (PCM), or in some applications a dedicated Transmission Control Module (TCM), monitors various parameters to ensure proper gear engagement. Specifically, when a shift from second to third gear is commanded, the control module expects to […]

What Does Code P0783 Mean? DTC P0783 signifies a 3-4 Shift Malfunction within the automatic transmission system. This code is set by the Powertrain Control Module (PCM) or Transmission Control Module (TCM) when it detects that the commanded 3rd to 4th gear shift either failed to occur, occurred too slowly, or resulted in an incorrect […]

What Does Code P0784 Mean? DTC P0784 indicates a malfunction within the powertrain’s control system relating specifically to the 4-5 upshift engagement of the automatic transmission. The Powertrain Control Module (PCM) or Transmission Control Module (TCM), depending on vehicle architecture, constantly monitors various transmission parameters, including input shaft speed (turbine speed), output shaft speed, engine […]

What Does Code P0785 Mean? The diagnostic trouble code P0785 signifies a detected electrical malfunction within the 3-2 shift solenoid circuit. In an automatic transmission system, the 3-2 shift solenoid is a critical electro-hydraulic component controlled by the Powertrain Control Module (PCM) or Transmission Control Module (TCM). Its primary function is to regulate the flow […]

What Does Code P0786 Mean? The OBD-II diagnostic trouble code P0786 signifies a detected malfunction within the transmission’s shift timing or range performance, specifically relating to a shift solenoid. The Powertrain Control Module (PCM), or Transmission Control Module (TCM) in some applications, constantly monitors the operation of the transmission’s electro-hydraulic shift solenoids. These solenoids are […]

What Does Code P0787 Mean? DTC P0787, which translates to “Shift/Timing Solenoid Low,” indicates that the Powertrain Control Module (PCM) or Transmission Control Module (TCM) has detected an electrical anomaly in the circuit of a specific shift or timing solenoid within the automatic transmission. The term “Low” typically signifies that the voltage or current within […]

What Does Code P0788 Mean? The diagnostic trouble code P0788 indicates a detected electrical anomaly within the shift/timing solenoid circuit, specifically signaling a “High” condition. This generally means the Powertrain Control Module (PCM) or Transmission Control Module (TCM) has detected a voltage or current reading in the solenoid’s control circuit that is higher than the […]

What Does Code P0789 Mean? DTC P0789 signifies an intermittent electrical or hydraulic malfunction within the transmission’s shift timing solenoid circuit. The Powertrain Control Module (PCM) or Transmission Control Module (TCM), which often operates as a singular unit, continuously monitors the operational characteristics of the various shift solenoids responsible for engaging specific gear ratios. When […]