FAULT CODE 164
Flash code FI warning
lamp (MIL)
45 FI warning lamp (MIL) flashes 4x long, 5x short
Display on diagnostic tool P0031
"Heater lambda sensor cylinder 1, sensor 1"
"Open/short circuit to ground"
Error level condition Malfunction in the circuit: ≥ 3 s
Function check Checking the heating lambda sensor ( p. 164)
Possible cause Heating lambda sensor - power supply is faulty ( p. 164)
Heating lambda sensor - value is not plausible ( p. 165)
Heating lambda sensor - control line is open ( p. 165)
Heating lambda sensor - control line has a short circuit to sensor ground ( p. 166)
Heating lambda sensor - control line has a short circuit to ground (terminal 31) ( p. 166)
Checking the heating lambda sensor
Condition
The diagnostic tool is connected and active.
– Select the model type.
– Select "ECU Diagnostic".
– Highlight the "Engine electronics EXC" control unit.
– Press "Continue".
– Select "actuator test".
– "Please enter password:"
– Press "Continue".
– Select "Heating lambda sensor cylinder 1".
– Press "Continue".
– Read the information page in the HUSABERG diagnostic tool and, with "Continue", begin the actuator test.
Lambda sensor
"Function Hego Sensor Bank 1" at test start
Voltage "Hego1AD"
5 V
Lambda sensor
"Function Hego Sensor Bank 1" at test end
Voltage "Hego1AD"
0 V
» If the displayed value is equal to the setpoint value:
– Delete the fault code.
– Make a test ride.
– Read out the fault code.
» If the displayed value is not equal to the setpoint value:
– Check the next possible cause:
Heating lambda sensor - power supply is faulty ( p. 164)
Heating lambda sensor - power supply is faulty
Condition
The diagnostic tool is connected and active.
The EFI control unit is connected.
Lambda sensor is disconnected.
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