Archives: DTC Codes

What Does Code B1301 Mean? DTC B1301 signifies an “Open Circuit” within the power door lock system, as detected by the Body Control Module (BCM) or a similar dedicated door control module. While the Engine Control Module (ECM) or Powertrain Control Module (PCM) typically do not directly monitor door lock circuits, they often communicate with […]

What Does Code B1302 Mean? DTC B1302 indicates a circuit fault within the coil of the Accessory Delay Relay. This relay is a critical component in many vehicle electrical systems, responsible for providing power to certain convenience accessories—such as the radio, power windows, and sunroof—for a brief period after the ignition is switched off, typically […]

What Does Code B1303 Mean? The diagnostic trouble code B1303 indicates an “Accessory Delay Relay Coil Circuit Open”. This code specifically points to an electrical integrity issue within the control circuit for the Accessory Delay Relay (ADR). The ADR is a critical component of the vehicle’s Retained Accessory Power (RAP) system, which provides power to […]

What Does Code B1304 Mean? DTC B1304 signifies a fault within the Accessory Delay Relay (ADR) coil control circuit, specifically indicating a short to battery voltage. This is typically a manufacturer-specific “B” code, meaning it relates to the vehicle’s body, comfort, or convenience systems, and is usually detected and managed by the Body Control Module […]

What Does Code B1305 Mean? DTC B1305 indicates a detected electrical fault within the control circuit of the Accessory Delay Relay coil, specifically a “Short To Ground.” This code is typically set by the Body Control Module (BCM), Smart Junction Box (SJB), Generic Electronic Module (GEM), or in some integrated systems, the Powertrain Control Module […]

What Does Code B1306 Mean? DTC B1306 signifies an detected open circuit within the engine oil level switch or sensor monitoring system. The Powertrain Control Module (PCM), also referred to as the Engine Control Module (ECM) in some applications, is responsible for continuously monitoring the electrical integrity of various engine sensors and their associated circuits. […]

What Does Code B1307 Mean? DTC B1307 signifies a fault within the oil level switch circuit where the Engine Control Module (ECM) or Powertrain Control Module (PCM) detects an unexpected short to battery voltage. The oil level switch is a critical component of the engine’s lubrication system monitoring, typically a simple switch that completes or […]

What Does Code B1308 Mean? Diagnostic Trouble Code (DTC) B1308 indicates that the Engine Control Module (ECM), also commonly referred to as the Powertrain Control Module (PCM), has detected a short circuit to ground within the engine oil level switch circuit. The oil level switch is a crucial component of the engine management system, designed […]

What Does Code B1309 Mean? The diagnostic trouble code B1309 signifies a Power Door Lock Circuit Short To Ground. This code is typically set by the Body Control Module (BCM) or a dedicated Door Lock Module (DLM), which are integral components of the vehicle’s electrical system responsible for managing body-related functions, rather than the Engine […]

What Does Code B1310 Mean? DTC B1310 indicates a malfunction within the power door unlock circuit, as detected by the vehicle’s Body Control Module (BCM) or a similar integrated control unit such as a Smart Junction Box (SJB) or General Module (GM). This code specifically signifies that the control module monitoring the door lock system […]