Alfa-Romeo OBD/OBD2 Codes

• Accessing Codes
  • Spider (Motronic ML4.1)
  • 164 (Motronic ML4.1)
• Reading Codes
• Clearing Codes
• Alfa-Romeo Codes
• Questions & Answers

NOTE: 96 & later are OBD2 systems and require a scanner. For an OBD2 code list, please see our Alfa-Romeo code list or the appropriate generic list.

Alfa Romeo: Accessing 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
• 

Alfa Romeo: Reading Diagnostic Trouble Codes

• 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.

Alfa Romeo: 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.

Alfa Romeo: Trouble Codes

Please see our Alfa Romeo OBD2 page for OBD2 fault codes.