delete code, then disconnect the DME for a minimum of 5
minutes to initiate a reset. Rerun car. If code recurs and no
other defects are found the DME is most likely damaged and
must be replaced. If the code does not recur and the engine
runs properly, ignore.
1221 Lambda (O2) Sensor 1 This code is stored when the engine temperature is >70C and
the Oxygen Sensor value is out of range or not present. Check
the Oxygen Sensor wiring and the operation of the sensor. The
value should fluctuate between 0.02 and 0.85V. Slow
fluctuation indicates a polluted Oxygen sensor and negative
values indicate a damaged sensor. Note: Cars without
Catalytic Convertors will incorrectly store this code.
1222 Lambda Control 1 This code is stored when the DME detects excessive
deviations in the air-fuel mixture (too rich or too lean) for longer
than 10 seconds. Possible causes: Fuel tank ran empty,
Incorrect Fuel Pressure, Injector valve defective or coked,
Engine Temperature Sensor defective, Secondary air leak,
Fuel evaporation control system defective, Air Flow Meter
defective and/or the combustion is being disturbed by
mechanical failure (Spark plugs,, compression,
intake/exhaust valves, ...etc.)
1223 Coolant Temp. Sensor This code is stored when a short to plus or a break in the
wiring at the Coolant Temperature Sensor or its supply wires
may exist. Check the wiring and the value of the sensor.
8.26-10.56 KOhms at -10C, 2.2-2.7 KOhms at 20C, 290-364
Ohms at 80C
1224 Intake Air Temp. Sensor This code is stored when a short to plus or a break in the
wiring at the Intake Air Temperature Sensor or its supply wires
exists. Check the value of the sensor. 2.2-2.7 KOhms at 20C,
760-910 Ohms at 50C
1225 Knock Sensor 1 This code is set when Knock Sensor #1 has sent multiple
signals or a break or short has occurred in the sensor or it's
wiring. Check the Knock Sensor and its wiring for defects.
Check with customer about the grade of fuel being used
(RON>91). Increase octane if necessary. (Caution customer
about carbon build up.)
1226 Knock Sensor 2 This code is set when Knock Sensor #2 has sent multiple
signals or a break or short has occurred in the sensor or it's
wiring. Check the Knock Sensor and its wiring for defects.
Check with customer about the grade of fuel being used
(RON>91). Increase octane if necessary. (Caution customer
about carbon build up.)
1227 Knock Sensor 3 This code is set when Knock Sensor #3 has sent multiple
signals or a break or short has occurred in the sensor or it's
wiring. Check the Knock Sensor and its wiring for defects.
Check with customer about the grade of fuel being used
(RON>91). Increase octane if necessary. (Caution customer
about carbon build up.)
1228 Knock Sensor 4 This code is set when Knock Sensor #4 has sent multiple
signals or a break or short has occurred in the sensor or it's
wiring. Check the Knock Sensor and its wiring for defects.
Check with customer about the grade of fuel being used
(RON>91). Increase octane if necessary. (Caution customer
about carbon build up.)
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