To read engine codes on this model do the following:
1) Short pins 4 and 6 on diagnostics socket (counting left to right, top to bottom, with wider edge at top)
2) Switch ignition on (do not start engine)
3) Engine Check light will "flash out" codes - if any
4) Ignition off and remove short.

Check light flashes tens then units, 2.5s delay, next code, 2.5s delay, and so on.
After a 4sec delay it repeats (all) the code(s).

Mine shows just a code 81 - not what I was expecting and nothing to do with fuelling. Plus the car starts and runs, so doesn't seem to care about the issue!

Here is a list of codes:
Code and Title
Description
Possible Causes

13 Engine revolution signal.
When the engine revolution signal is not imputed while the starter switch is on.
1. Cam angle sensor & circuit

21 Oxygen sensor signal.
When the input signal from the oxygen sensor shows too lean air-to-fuel ratio under certain conditions:
1. Oxygen sensor circuit 2. Oxygen sensor

31 Pressure sensor signal.
When the input signal from the pressure sensor becomes more than 4.9 V or less than 0.7 V.
1. Pressure sensor circuit 2. Pressure sensor

42 Cooling water temperature signal.
When the engine cooling water temperature sensor circuit becomes open or shorted.
1. Water temp. sensor circuit 2. Water temperature sensor

43 Intake air temp. signal.
When the intake air temperature sensor circuit becomes open or shorted.
1. Air temperature sensor circuit 2. Air temperature sensor

44 A/C evapo. temperature sensor.
When the A/C evaporator temperature sensor circuit exhibits open or short.
1. A/C evaporator temperature sensor circuit 2. A/C evaporator temperature sensor

45 A/C compressor.
When the A/C switch is turned on, the rotation signal from the A/C compressor becomes too low because of slipping of the magnet clutch or overload.
1. A/C magnet clutch. 2. A/C lock sensor circuit

51 Switch signal.
When the A/C switch is turned on, the idle switch is turned off with the test terminal of the diagnosis connector shorted. However no memorizing will take place.
1. A/C switch circuit 2. A/C switch 3. Idle switch circuit 4. Throttle position sensor

52 Vehicle speed sensor signal.
When the vehicle speed sensor signal circuit exhibits open wire or short circuit.
1. Vehicle speed sensor circuit 2. Vehicle speed sensor

81 Immobiliser signal.
When the rolling codes cannot be exchanged between the EFI ECU and the immobiliser ECU or the rolling codes are not matched.
1. Wire harness between the Immobiliser ECU and EFI ECU 2. Immobiliser ECU 3. EFI ECU

83 Immobiliser signal.
When the rolling codes cannot be exchanged in the EFI ECU.
1. EFI ECU

thanks
Jon