Fuel Level Sensor - Lotus Evora Service Notes

Lotus Service Notes

Fuel Level Sensor

P0461 Fuel Level Sensor "A" Circuit Range/Performance
P0462 Fuel Level Sensor "A" Circuit Low
P0463 Fuel Level Sensor "A" Circuit High
Description
When the engine is running the ECU continuously monitors the fuel level sensor feedback signals. The feedback
signal should be low when turned ON and high when turned OFF. The following codes will be set if the above
conditions are not meet.
Sensor connections
Sensor Connector Description
1
2 Fuel level sensor
3 Fuel level sensor ground.
P0462, P0463
Monitor:
• Continuous
Enable Criteria:
• Engine Running
Disable Criteria:
• None
Malfunction Criteria:
• P0462 – Voltage < 0.020V, P0463 – Voltage > 0.684V for 1.5 secs
Potential failure modes:
• Sensor open or short circuit
• Fuel level sensor
Diagnostic Mask:
• The MIL will be illuminated if these faults are present for 2 consecutive trips.
P0461
The ECU calculates the fuel usage and determines whether the fuel level sensor has responded correctly to
this usage. The ECU also monitors the filtered and unfiltered signal at idle after a 20 second de-slosh period
and compares the differences.
Monitor:
• Continuous
Enable Criteria 1:
• Vehicle Idling
• Vehicle stationary for 20 seconds
Disable Criteria 1:
• Fuel level < 3.3 litres (0.9 US gallons)
Malfunction Criteria 1:
• Signal fluctuation > 10 litres, 35 times over 7 second period
ECU Pin
A2
K3
2009/02
Section EMR
ECU Connector
48 Way (Right)
48 Way (Right)
Page 47