Trouble codes on your OBD1 BMW

Trouble Codes OBD1If your BMW was manufactured between the late 1980’s and 1995, you should be able to pull diagnostic codes out of the car via the check engine light.

To read these codes, turn the key to position two (run), but do not start the engine. Within 3 seconds of turning the key to position 2, you will need to stomp the gas pedal from idle (not touching the pedal) to WOT (wide open throttle, to the floor) and back, 5 times. If you successfully do this within the 3 second window, the check engine light will turn off, then a long on, then off again, and then begin flashing the codes out to you. If there are no stored codes, it will still flash something out, as there is a code for that too. If you get a constant lit CEL, turn the ignition off and try again.

The code for “no codes stored” is 1444, which would be presented as on-off-on-on-on-on-off-on-on-on-on-off-on-on-on-on-off-on-on-on-on followed by a long off, a long on, and then repeating.

 

System Error Code
DME Control Unit 1211
Air Mass/Volume Sensor 1215
Throttle Potentiometer 1216
Output Stage, Group 1 1218
Output Stage, Group 2 1219
EGO(O2) Sensor 1 1221
EGO(O2) Sensor 2 1212
Lambda Control 1 1222
Lambda Control 2 1213
Coolant Temp. Sensor 1223
Intake Air Temp. Sensor 1224
Knock Sensor 1 1225
Knock Sensor 2 1226
Knock Sensor 3 1227
Knock Sensor 4 1228
Battery Voltage/DME Main Relay 1231
Throttle Idle Switch 1232
Throttle WOT Switch 1233
Speedometer A Signal 1234
A/C Compressor cut off 1237
A/C Compressor 1242
Crankshaft Pulse Sensor 1243
Camshaft Sensor 1244
Intervention AEGS 1245
Ignition Secondary Monitor 1247
Fuel Injector 1 (or group 1) 1251
Fuel Injector 2 (or group 2) 1252
Fuel Injector 3 1253
Fuel Injector 4 1254
Fuel Injector 5 1255
Fuel Injector 6 1256
Fuel Injector 7 1257
Fuel Injector 8 1258
Fuel Pump Relay Control 1261
Idle Speed Actuator 1262
Purge Valve 1263
EGO Heater 1264
Fault Lamp (check engine) 1265
VANOS 1266
Air Pump Relay Control 1267
Ignition Coil 1 1271
Ignition Coil 2 1272
Ignition Coil 3 1273
Ignition Coil 4 1274
Ignition Coil 5 1275
Ignition Coil 6 1276
Ignition Coil 7 1277
Ignition Coil 8 1278
Control Unit Memory Supply 1281
Fault Code Memory 1282
Fuel Injector Output Stage 1283
Knock Control test Pulse 1286