OBDII Alfa Romeo Code Definitions.

Be sure to double check the codes. Anything P1000 to P1999 or P3000 to P3400 will be Manufacturer specific and may not match the ones listed here. Check specific manufacturer pages on the site, as some of them, we list the OBD2 codes on those pages for those specific vehicles.

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Alfa Romeo Codes
Trouble CodeFault Location
P1100 – P1199 (Fuel and air metering)
P1120Throttle control unit - malfunction
P1172Long trem fuel trim - at idle
P1173Long trem fuel trim - at increased engine RPM
P1200 – P1299 (Fuel and air metering – injector circuit)
P1211Battery Voltage Incorrect
P1212Idle Throttle Switch Or Circuit
P1213Full Throttle Swithc Or Circuit
P1214Engine Temperature Sensor
P1221Air Flow Meter Or Circuit
P1222Idle Adjustment Actuator Or Circuit
P1223HO2S Regulator Inner Adjuster Reaches Minimum Or Maximum Value of Correction
P1224Heated Oxygen Sensor
P1225Air Temperature Sensor
P1243Fuel Pump Relay Or Circuit
P1244Purge Control Solenoid Or Circuit
P1245Output Stage of ECU For Variable Valve Timing
P1251ECU Faulty
P1265Output Stage of ECU For Check Engine Lamp
P1300 – P1399 (Ignition system or misfire)
P1325Engine controlmodule (ECM),knock control - malfunction
P1331AC compressor clutch relay - signal malfunction
P1500 – P1599 (Vehicle or idle speed control)
P1511Idle speed control (ISC) actuator / idle speed control (ISC) actuator position sensor - circuit malfunction
P1512Idle speed control (ISC) - malfunction
P1513Idle speed control (ISC) actuator - circuit malfunction
P1531AC compressor clutch relay - circuit malfunction
P1555Brake pedal position (BPP) switch - signal malfunction
P1565Cruise control master switch - signal malfunction
P1600 – P1699 (ECM – computer output circuit)
P1653Camshaft position (CMP) actuator - signal malfunction
P1654Intake manifold air control solenoid - circuit malfunction
P1662Cruise control indicator lamp -malfunction
P1690Fuel shut-off control - malfunction