In the case that you are experiencing issues or your vehicle's system shows an OBD-code, we have compiled a list that can help you pinpoint the problem and provide you with information on common fixes.
Lean mixture
The engine combustion has higher concentration of air to fuel than it should have.
P0171 - System too lean (Bank 1)
Possible eFlexFuel related issue & fix:
- The main unit +12V power supply is disconnected. Check the male connector connections of the eFlexFuel wiring harness.
- eFlexFuel wiring harness grounding is not connected or the grounding point is corroded.
- If you are able to connect to the main unit via Bluetooth (engine has to be running), the power supply is fine. Check for possible fault codes in the system.
Rich mixture
Engine combustion has a lower concentration of air to fuel than it should have.
P0172 - System too rich (Bank 1)
Possible eFlexFuel related issue & fix:
- The eFlexFuel ethanol sensor detects that the ethanol content is wrong.
- Make sure that the ethanol sensor connector is plugged in correctly. Check the installation for wiring running too close to high voltage engine components (ignition coils, leads etc.).
- Check for possible fault codes in the system.
Misfiring
One or more cylinders are misfiring.
P0300 - Random or multiple cylinder misfire / P0301 - Cylinder 1 misfire etc.
Possible eFlexFuel related issue & fix:
- Make sure ignition related parts (spark plugs, ignition coils, leads etc.) of the engine are in good working order.
- Check for possible fault codes in the system.
Catalytic converter
The catalytic converter is not functioning efficiently.
P0420 - Catalyst system efficiency below threshold
Possible eFlexFuel related issue & fix:
- The eFlexFuel system does not have an effect on the catalytic converter functionality.
- Lean / rich mixture or misfiring can trigger P0420 – fault code, check above
- It is possible that the catalytic converter needs to be replaced.
Fuel injector circuit open / circuit malfunction
The vehicle ECU/ECM has detected a malfunction with one or more cylinder injector circuits.
P0201 - Cylinder 1 injector circuit malfunction
Possible eFlexFuel related issue & fix:
- Bad connection. Check all of the connections.