The connection stops or is unstable

The vehicle engine compartment may interfere with the bluetooth connection. This may cause poor reception between the eFlexFuel control unit and the connected mobile device. Thick vehicle insulation or enclosed mounting of the control unit to the engine compartment can cause a poor usage.

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eFlexFuel App fault codes

Ethanol sensor not connected Check that the ethanol sensor connector is properly attached and wire is not damaged. Check that the ethanol sensor cable connector is properly connected to the ethanol sensor. Make sure the purple lock on the wiring harness is on the bottom. Check that the pins on the connectors are not oxidized. […]

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App versions

Nameplate backside of the control unit tells which App version you should use. Control unit PCB4.3+: iOS iTuner store Control unit PCB4.3+: Google play store Control unit PCB4.2 and older: Google play store

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What is the PIN number?

The newest devices do not have PIN codes. PCB4.2 version pin code is 8585. PCB4.3-5.0 version pin code is 858585. In old aluminum devices, the pin code can be a four-digit number. The pin code is described in the old version’s manual or the packing list. iOS devices pairing has to be done in eFlexFuel […]

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