Stomp Test for the Check Engine Light

From BMW E34 Encyclopedia

Procedure[edit]

  1. Turn ignition key to position 2 (just before cranking the engine)
  2. Fully depress the accelerator to the floor 5 times within 5 seconds
  3. The check engine light (CEL) will stay on for 5 seconds, blink off, come on for 2.5 seconds, then go off for 2.5 seconds. At this point, the fault codes will begin to flash.

Erase Fault Codes[edit]

To erase the fault code memory, first make sure the fault code 1000 (short blink and then the light goes out for a long period) is present, then depress the throttle fully for at least 10 seconds. Repeat the stomp test to look for code 1444 (no faults stored).

Fault Codes[edit]

Code Description
1211 DME Control Unit
1215 Air Mass Sensor
1216 Throttle Position Sensor
1218 Output Stage, Group 1
1219 Output Stage, Group 2
1221 Oxygen Sensor 1
1212 Oxygen Sensor 2
1222 Lambda Control 1
1213 Lambda Control 2
1223 Coolant Temperature Sensor
1224 Intake Air Temperature Sensor
1225 Knock Sensor 1
1226 Knock Sensor 2
1227 Knock Sensor 3
1228 Knock Sensor 4
1231 Battery Voltage/DME Main Relay
1232 Throttle Idle Switch
1233 Throttle Wide Open Throttle Switch
1234 Speedometer A Signal
1237 A/C Compressor Cut Off
1242 A/C Compressor
1243 Crankshaft Pulse Sensor
1244 Camshaft Sensor
1245 Intervention AEGS
1247 Ignition Secondary Monitor
1251 Fuel Injector 1 (or group 1 for DME 1.3, cylinders 1, 3, 5)
1252 Fuel Injector 2 (or group 2 for DME 1.3, cylinders 2, 4, 6)
1251 Fuel Injector 1
1252 Fuel Injector 2
1253 Fuel Injector 3
1254 Fuel Injector 4
1255 Fuel Injector 5
1256 Fuel Injector 6
1257 Fuel Injector 7
1258 Fuel Injector 8
1261 Fuel Pump Relay Control
1262 Idle Speed Actuator
1263 Purge Valve
1264 EGO Heater
1265 Fault Lamp (check engine light)
1266 VANOS
1267 Air Pump Relay Control
1271 Ignition Coil 1
1272 Ignition Coil 2
1273 Ignition Coil 3
1274 Ignition Coil 4
1275 Ignition Coil 5
1276 Ignition Coil 6
1277 Ignition Coil 7
1278 Ignition Coil 8
1281 Control Unit Memory Supply
1282 Fault Code Memory
1283 Fuel Injector Output Stage
1286 Knock Control Test Pulse
1444 No Fault Codes stored
1000 End of fault code output