Multiple or random fault codes at the same time may appear if there are pre-existing electrical problems that influence the operation of the eFlexFuel control unit.
⚠️Note: Fault codes can be triggered by electromagnetic interference with your eFlexFuel kit. Ensure the Control Unit, Ethanol Sensor, and Wiring Harness are all moved away from high voltage components, such as coil packs, as these can cause this interference.
Ethanol sensor is not connected
- Check that the ethanol sensor connectors are properly attached at both ends, and the wire is not damaged.
- Check that the pins on the connector are not oxidized and/or damaged.
- Check that the wiring harness routing is not close to high voltage components.
Low ethanol content
- The ethanol sensor has detected a low ethanol content. The warning limit is 2 %. Under normal circumstances, gasoline contains at least 5 % ethanol.
- If the ethanol content reading is 0 %, make sure that the ethanol sensor is connected to the fuel line and not to e.g., a breather hose.
- A low ethanol content reading can indicate a low fuel pressure. There is air in the fuel line, and varying ethanol content readings are displayed. The fuel pump may be worn out, or the fuel filter can be clogged.
Fuel is contaminated
- The ethanol sensor has detected contaminated fuel (water in fuel tank etc.).
- If the sensor cannot detect the right ethanol content, the value is set to 40 percent (%) as a safety precaution. NOTICE: avoid driving with this condition or refuel the vehicle with a 50/50 percent (%) mixture of ethanol and gasoline.
Temperature sensor signal is out of range
- The temperature sensor has detected temperature that is out of the measurement range.
- Check that the wiring harness is not routed close to high voltage components.
- Check that the temperature sensor is properly installed and wiring is not damaged.
Injector capacity is temporarily insufficient
- The injector duty cycle has reached 100 percent (%). Monitor the duty cycle level with the eFlexApp® mobile application log feature while driving.
- Possible reasons could be clogged fuel nozzles, a clogged fuel filter, defected fuel pump.
- If the diagram shows random ''spikes'' it is presumably a result of electrical interference.