Alpha Trouble Code Info

Alfa Romeo: Diagnostic Trouble Codes

Spider (Motronic ML4.1)

To access DTCs, with engine running, depress auto diagnostic push button located under rear seat. DTCs of four digits are indicated by the Check Engine lamp in a series of flashes and pauses.

Motronic ML4.1 auto diagnostic push button location. Spider models

     

164 (Motronic ML4.1)

To access DTCs, turn ignition On, depress auto diagnostic push button (T4), located on the lower LH side of the instrument panel, for approximately 2 1/2 to five seconds. DTCs of four digits are indicated by the Check Engine lamp in a series of flashes and pauses.

Motronic ML4.1 auto diagnostic push button location. 164 models

     

Diagnostic Trouble Code Interpretation

The Check Engine lamp will display DTCs by flashing frequencies and 2 1/2 second pauses. As an example, one flash, followed by a 2 1/2 second pause, followed by two flashes and another 2 1/2 second pause, followed by four flashes and a 2 1/2 second pause, followed by three flashes and another 2 1/2 second pause, indicates a DTC 1243. The DTC will be repeated until the auto diagnostic push button is depressed to proceed to the next DTC.

Clearing Diagnostic Trouble Codes

After performing all necessary repairs, the DTCs should be cleared from the ECU memory by depressing the auto diagnostic push button for more than 10 seconds, or by disconnecting and isolating the battery ground cable for approximately 10 seconds.

Trouble Codes

1211

Battery Voltage Improper

1212

Idle Throttle Switch Or Circuit

1213

Full Throttle Switch Or Circuit

1214

Engine Temperature Sensor

1221

AFM Or Circuit

1222

Idle Adjustment Actuator Or Circuit

1223

HO2S Regulator Inner Adjuster Reaches Minimum Or Maximum Value Of Correction

1224

HO2S

1225

Air Temperature Sensor

1243

Fuel Pump Relay Or Circuit

1244

Purge Control Solenoid Or Circuit

1245

Output Stage Of ECU For Variable Valve Timing

1251

ECU Faulty

1265

Output Stage Of ECU For Check Engine Lamp

4444

No Recognized Malfunction