Archives: DTC Codes

What Does Code P1572 Mean? The diagnostic trouble code P1572 indicates that the Powertrain Control Module (PCM), also known as the Engine Control Module (ECM) in some vehicles, has detected an electrical malfunction within the brake pedal switch circuit. This switch, often referred to as the brake light switch or stop lamp switch, provides a […]

What Does Code P1573 Mean? DTC P1573, which translates to “Throttle Position Not Available,” signifies that the Powertrain Control Module (PCM) or Engine Control Module (ECM) is not receiving a plausible or expected signal regarding the throttle’s commanded or actual position. In modern vehicles equipped with electronic throttle control (ETC), commonly known as “drive-by-wire” systems, […]

What Does Code P1574 Mean? DTC P1574 indicates a detected disagreement or inconsistency between the primary and secondary Throttle Position Sensors (TPS), often designated as TPS1 and TPS2, or TPS ‘A’ and TPS ‘B’. In modern drive-by-wire Electronic Throttle Control (ETC) systems, the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), […]

What Does Code P1575 Mean? DTC P1575 signifies that the Powertrain Control Module (PCM), also referred to as the Engine Control Module (ECM), has detected an invalid or out-of-range signal from the Accelerator Pedal Position (APP) sensor during its internal self-test or continuous monitoring. The APP sensor is a critical component of the Drive-by-Wire (DBW) […]

What Does Code P1576 Mean? The diagnostic trouble code P1576, “Pedal Position Not Available,” signifies that the Powertrain Control Module (PCM), often referred to as the Engine Control Module (ECM) or Vehicle Control Module (VCM), is not receiving a valid or expected signal from the Accelerator Pedal Position (APP) sensor. This code is almost exclusively […]

What Does Code P1577 Mean? Diagnostic Trouble Code (DTC) P1577 indicates a disagreement between the primary and secondary Accelerator Pedal Position (APP) sensors or circuits. Modern vehicles equipped with Electronic Throttle Control (ETC), commonly known as drive-by-wire, rely on multiple redundant APP sensors (typically two or three) for safety and accurate driver demand input. These […]

What Does Code P1578 Mean? DTC P1578, “ETC Power Less Than Demand,” indicates a critical issue within the Electronic Throttle Control (ETC) system, commonly known as Drive-by-Wire. This code is set by the Engine Control Module (ECM) or Powertrain Control Module (PCM) when it detects a significant discrepancy between the commanded throttle plate opening (demand) […]

What Does Code P1579 Mean? DTC P1579, “ETC In Power Limiting Mode,” indicates that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected a critical fault within the Electronic Throttle Control (ETC) system and has, as a safety measure, intentionally engaged a power limiting or “limp home” mode. The ETC system, commonly […]

What Does Code P1580 Mean? DTC P1580, “Electronic Throttle Monitor PCM Override,” indicates a critical malfunction within the Electronic Throttle Control (ETC) system, also commonly known as “drive-by-wire.” In modern vehicles, the ETC system replaces the traditional mechanical throttle cable with an electronically controlled throttle body. This system relies on an Accelerator Pedal Position (APP) […]

What Does Code P1581 Mean? DTC P1581 signifies an Electronic Throttle Monitor Malfunction within the Engine Control Module (ECM), also commonly referred to as the Powertrain Control Module (PCM). This code specifically indicates that the ECM has detected an inconsistency or fault within its internal monitoring system responsible for the Electronic Throttle Control (ETC) assembly. […]