Lotus Evora. Manual - part 24

 

 

Lotus Service Notes   

 

 

  Section EMR

Potential failure modes:

•  Signal open circuit

•  Reference voltage open circuit

•  Reference voltage short to ground

•  Sensor failure

Diagnostic Mask:

•  The MIL will be illuminated if fault is present.

Notes: A maximum throttle opening of 15% may be imposed due to this single code.  In the case of multiple 

codes, a mechanically sprung 7% opening may be applied.

2009/02

 

 

Lotus Service Notes   

 

 

  Section EMR

Coolant Thermostat (USA only)

P0128  Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)

2009/02

 

 

Lotus Service Notes   

 

 

  Section EMR

O2 Sensor (Pre Catalyst)

P0131  O2 Sensor 1 Circuit Low Voltage (Bank 1)

P0132  O2 Sensor 1 Circuit High Voltage (Bank 1)

P0133  O2 Sensor 1 Circuit Slow Response (Bank 1)

P0134  O2 Sensor 1 Circuit No Activity Detected (Bank 1)

P0135  O2 Sensor 1 Heater Circuit (Bank 1)

P0151    O2 Sensor 1 Circuit Low Voltage (Bank 2)

P0152    O2 Sensor 1 Circuit High Voltage (Bank 2)

P0153    O2 Sensor 1 Circuit Slow Response (Bank 2)

P0154    O2 Sensor 1 Circuit No Activity Detected (Bank 2)

P0155    O2 Sensor 1 Heater Circuit (Bank 2)

Description

The oxygen sensors separately monitor the oxygen content in the exhaust gases of each bank of the engine. 

Each sensor is electrically heated to improve response after start. 

The sensor consists of a zirconia electrode between two platinum plates. When zirconia comes into contact with 

oxygen, it becomes an electrical conductor. The exhaust gases pass through louvers in the sensor. One plate 

is in contact with the outside air and the other plate is in contact with the exhaust gases. The platinum plate in 

contact with the air is electrically negative due to the oxygen in the atmosphere and the plate in contact with 

the exhaust gases is electrically positive. This will cause a difference in electrical potential to develop between 

the two plates. Thus the voltage across the platinum plates ranges approximately from 100 millivolts to 900 

millivolts, depending on the oxygen content of the exhaust gases. Thus when the air/fuel mixture is rich, the 

oxygen sensor output will be high. If the air/fuel mixture is lean, the oxygen sensor output will be low.

Sensor connections

Sensor Connector    Description      ECU Pin      ECU Connector

1 Bank 1         Signal             G3         48 Way (Centre)

2 Bank 1         Ground             J2        48 Way (Centre)     

3 Bank 1         Heater             H3        48 Way (Centre)

4 Bank 1         Battery Voltage         -                -

1 Bank 2         Signal           G4       48 Way (Centre)

2 Bank 2         Ground          J2       48 Way (Centre)

3 Bank 2         Heater          H4       48 Way (Centre)

4 Bank 2         Battery Voltage      -            -

Sensor characteristics

Normal operating range is 0 – 1000mV

P0131 (Bank1) or P0151 (Bank2) 

Monitor:

•  Continuous.

Disable Criteria: 

•  DFCO (Deceleration Fuel Cut Off)

•  AE DE (Acceleration Enrichment Deceleration Enleanment)

•  Misfire

Enable Criteria: 

•  Engine running

Failure  Criteria: 

•  Sensor voltage < 15mV for more than 1.5 seconds consecutively for a specified number of times.

 

2009/02

 

 

Lotus Service Notes   

 

 

  Section EMR

Potential failure modes:

•  Low fuel pressure (Lean mixture)

•  Malfunctioning sensor

•  External water on sensor

•  Sensor wire shorted to ground

Diagnostic Mask:

•  The MIL will be illuminated if these faults are present for 2 consecutive trips.

P0132 (Bank1) or P0152 (Bank2)

Monitor: 

•  Continuous.

Disable Criteria: 

•  None

Enable Criteria: 

•  Engine running

Malfunction Criteria: 

•  Sensor voltage > 1200V for more than 1.5 seconds consecutively for a specified number of times.

Potential failure modes:

•  High fuel pressure (Rich mixture)

•  Leaking or shorted injector

•  Purge valve fault

•  Oxygen sensor contamination

•  Engine oil contamination

•  Sensor wire shorted to heater voltage

Diagnostic Mask:

•  The MIL will be illuminated if these faults are present for 2 consecutive trips.

P0133 (Bank1) or P0153 (Bank2) 

Monitor: 

•  Continuous.

Disable Criteria:

•  P0116, P0117, P0118    – Coolant temperature sensor faults

•  P0101, P0102, P0103      – MAF sensor faults

•  P0335, P0500            – Crank or vehicle speed faults

•  P0131, P0132, P0134, P0135  – Pre catalyst oxygen sensor faults for Bank1 checks

•  P0151, P0152, P0154, P0155  – Pre catalyst oxygen sensor faults for Bank2 checks

Enable Criteria:

•  Vehicle speed between 0 – 255 km/h (158.5 mph)

•  MAF per stroke between 15 – 48 mg

•  Engine speed between 1285 – 1818rpm

•  Engine run time > 200 seconds

•  Coolant temperature > 60°C (140°F)

•  Closed loop fuelling enabled

Monitor:

•  Monitored until the required amount of switches (30) in both directions has been achieved or 130 seconds

has elapsed.  

2009/02