Flash Code 17 – This code indicates a failure of the engine’s injector actuation pressure sensor.Flash Code 15 – Oil Pressure Sensor: This code indicates an issue with the oil pressure sensor, which may require replacement.Flash Code 14 – This code indicates a failure of the engine’s oil or coolant temperature sensor.Flash Code 12 – Low Coolant Level: This code indicates that the engine’s coolant level is low and needs to be topped up.Flash Code 11 – This code indicates a failure of the engine’s intake air temperature sensor.Here is a list of some common fault codes that may be generated by a Caterpillar 3126 engine: These codes can be read using a diagnostic tool or scanner, which can provide detailed information about the nature and severity of the issue. One way to identify and diagnose these issues is by using fault codes.įault codes are generated by the engine’s onboard diagnostic system (OBD) and are designed to alert the operator or technician to any issues that are detected. As with any complex piece of machinery, the 3126 engine is prone to faults and issues that can impact its performance and reliability. The Caterpillar 3126 engine is a versatile and reliable machine that is widely used in various industrial applications.