Lotus 2004 Eleven Service Notes page 159

Lotus Service Notes
Potential failure modes:
• High fuel pressure (Rich mixture)
• Leaking or shorted injector
• Purge valve fault
• Oxygen sensor contamination
• Engine oil contamination
• Sensor wire
P0133
Set when the sensor fails to switch from a Lean to a Rich condition or switch from a Rich to a Lean condition
in a sufficiently timely manner. A selection of switches is used to determine the average times.
Enable Criteria:
• Vehicle speed between 0 – 255 km/h (158.5 mph)
• MAF per stroke between 15 – 70 mg
• Engine speed between 2600 – 3511rpm
• Engine run time > 200 seconds
• Coolant temperature > 60°C (140°F)
• Closed loop fuelling enabled
Disable Criteria:
P0116, P0117, P0118
P0131, P0132, P0134, P0135 – Pre catalyst oxygen sensor faults
P0101, P0102, P0103
Monitor:
Monitored until the required amount of switches in both directions has been achieved (Approx. 150 sec)
Potential failure modes:
• Sensor connector and wiring should be checked for corrosion and loose connections
• Sensor contaminated, possibly from fuel, improper use of RTV, engine oil or coolant
P0134
Set when the sensor fails to switch above 557mV ('06 M.Y.; 675mV) and below 400mV within a 5.1 second
period for 5 consecutive checks ('06 M.Y.; within 60 sec).
Enable Criteria:
• Engine run time > 30 seconds
• Engine is not at idle
• Engine is in closed loop fuel control
Monitor:
Until either passed or failed (5.1 x 5 = 25.5 sec + initial 30 sec = 55 sec maximum).
Potential failure modes:
Sensor connector and wiring should be checked for corrosion and loose connections.
P0135
Set when the sensor output is greater than 1900mA or less than 250mA for 1.5 seconds, for 40 consecutive
checks.
Enable Criteria:
Engine run time > 60 seconds
Monitor:
Continuous
Page 16
– Coolant temperature sensor faults
– MAF sensor faults
Section EMP