Archives: DTC Codes

What Does Code B1311 Mean? DTC B1311 signifies an “Open Circuit” detected within the power door unlock circuit of the vehicle’s body control system. This generic Body (B-prefix) code indicates that the Body Control Module (BCM), or in some architectures, a dedicated Door Control Module (DCM) or Passenger Door Module (PDM), has detected an absence […]

What Does Code B1312 Mean? DTC B1312 signifies a detected “Lamp Headlamp Input Circuit Short To Battery” condition. This code is typically set by the Body Control Module (BCM) or a similar integrated control module such as a Smart Junction Box (SJB) or Front Control Module (FCM), rather than the Powertrain Control Module (PCM). The […]

What Does Code B1313 Mean? DTC B1313 indicates a detected electrical fault within the coil circuit of the battery saver relay. The battery saver system is a critical component of a vehicle’s electrical architecture, designed to de-energize non-essential electrical accessories (such as interior lights, radio, power windows, and auxiliary power outlets) after a predetermined period […]

What Does Code B1314 Mean? DTC B1314 signifies an “Open Circuit” condition detected in the coil control circuit of the Battery Saver Relay. This diagnostic trouble code is typically set by the Powertrain Control Module (PCM), Engine Control Module (ECM), or more commonly, the Body Control Module (BCM) or a similar intelligent junction box (e.g., […]

What Does Code B1315 Mean? The diagnostic trouble code B1315, “Battery Saver Relay Coil Circuit Short To Battery,” indicates a specific electrical fault within the vehicle’s battery saver system. This system is typically managed by the Body Control Module (BCM) or, in some applications, the Powertrain Control Module (PCM/ECM). Its primary function is to de-energize […]

What Does Code B1316 Mean? DTC B1316 indicates that the vehicle’s Powertrain Control Module (PCM), Body Control Module (BCM), or Generic Electronic Module (GEM), depending on the specific vehicle architecture, has detected a short to ground in the control circuit for the battery saver relay coil. The battery saver system is an integral part of […]

What Does Code B1317 Mean? DTC B1317 indicates that one or more control modules within the vehicle’s electrical system have detected a sustained and excessively high system voltage. The Powertrain Control Module (PCM), Body Control Module (BCM), or other networked modules, such as the Instrument Cluster Control Module (ICCM) or Generic Electronic Module (GEM), constantly […]

What Does Code B1318 Mean? DTC B1318 signifies that a control module within the vehicle has detected an insufficient system voltage supply, consistently falling below a pre-calibrated threshold for a specified duration. While often generalized as “Battery Voltage Low,” this code is typically set by Body Control Modules (BCM), General Electronic Modules (GEM), Instrument Clusters […]

What Does Code B1319 Mean? DTC B1319 signifies a circuit malfunction within the driver’s door ajar sensing system. This code is typically set by the Body Control Module (BCM), or in some architectures, the General Module (GM) or another dedicated body electronics module, which monitors the electrical state of the driver’s door ajar switch. The […]

What Does Code B1320 Mean? DTC B1320 indicates a detected “Open Circuit” within the driver’s door ajar switch circuit. This is a Body (B) category code, pointing to an issue managed by the vehicle’s Body Control Module (BCM), or in some architectures, a Smart Junction Box (SJB) or Integrated Power Module (IPM) that interfaces with […]