If you are reading codes from specific BMW modules, you may find you get a code. Most of BMW diagnostic softwares like DIS, INPA. MCU controlled Interface for BMW Carsoft 6.5 which is compatible with the original interface. Fully digital line switching and MCU controlled service reset timing.

1 2 1 1 D M E C o n t r o l U n i t T h i s c o d e i s s t o r e d w h e n t h e D M E s e l f t e s t f a i l s. D e l e t e a n y stored codes.

Start and run the car for 30 seconds. Turn off the ignition for 30 seconds. Rerun the diagnosis. If the same fault recurs, the DME control unit must be replaced. 1 2 1 2 L a m b d a ( O 2 ) S e n s o r 2 T h i s c o d e i s s t o r e d w h e n t h e e n g i n e t e m p e r a t u r e i s >7 0 C a n d the Oxygen Sensor value is out of range or not present.

Check the Oxygen Sensor wiring and the operation of the sensor. The value should fluctuate between 0.02 and 0.85V. Slow fluctuation indicates a polluted Oxygen sensor and negative values indicate a damaged sensor. Note: Cars without Catalytic Convertors will incorrectly store this code.

1 2 1 3 L a m b d a C o n t r o l 2 T h i s c o d e i s s t o r e d w h e n t h e D M E d e t e c t s e x c e s s i v e deviations in the air-fuel mixture (too rich or too lean) for longer than 10 seconds. Possible causes: Fuel tank ran empty, Incorrect Fuel Pressure, Injector valve defective or coked, Engine Temperature Sensor defective, Secondary air leak, Fuel evaporation control system defective, Air Flow Meter defective and/or the combustion is being disturbed by mechanical failure (Spark plugs,, compression, intake/exhaust valves.etc.) 1 2 1 5 A i r M a s s / V o l u m e S e n s o r T h i s c o d e i s s t o r e d i f t h e r e i s a b r e a k o r s h o r t - c i r c u i t a t: A i r Mass Flow Meter or its supply wires or the voltage supply to Air Mass Flow Meter insufficient.

Cable damage is the most common cause of this trouble code. Doc Pdf Converter Full Version. 1 2 1 6 T h r o t t l e P o t e n t i o m e t e r T h i s c o d e i s s t o r e d i f a b r e a k o r s h o r t - c i r c u i t o c c u r s i n t h e wiring to the Throttle Potentiometer or the potentiometer is defective. Damage at the throttle potentiometer connection is the most common cause of this fault. 1 2 1 8 O u t p u t S t a g e, G r o u p 1 T h i s c o d e i s s t o r e d i f t h e r e i s a s h o r t t o B + o r G r o u n d a t t h e Output Amplifier Stage (Bank 1). Generally this code occurs with other defects. Causes may be a faulty Idle Speed Actuator, Injector Valves, Ig nition Coil on P lug, Oxygen Sensor Heating Relay, Fuel Evaporation, Control Valve, Malfunction Indicator Lamp (MIL) and/or EKP Relay. Delete the code after examining for other faults.

If the code recurs, delete code, then disconnect the DME for a minimum of 5 minutes to initiate a reset. If code recurs and no other defects are found the DME is most likely damaged and must be replaced. If the code does not recur and the engine runs properly, ignore.

1 2 1 9 O u t p u t S t a g e, G r o u p 2 T h i s c o d e i s s t o r e d i f t h e r e i s a s h o r t t o B + o r G r o u n d a t t h e Output Amplifier Stage (Bank 2). Generally this code occurs with other defects. Causes may be a faulty Idle Speed Actuator, Injector Valves, Ig nition Coil on P lug, Oxygen Sensor Heating Relay, Fuel Evaporation, Control Valve, Malfunction Indicator Lamp (MIL) and/or EKP Relay. Delete the code after examining for other faults.

If the code recurs. Delete code, then disconnect the DME for a minimum of 5 minutes to initiate a reset.

If code recurs and no other defects are found the DME is most likely damaged and must be replaced. If the code does not recur and the engine runs properly, ignore. 1 2 2 1 L a m b d a ( O 2 ) S e n s o r 1 T h i s c o d e i s s t o r e d w h e n t h e e n g i n e t e m p e r a t u r e i s >7 0 C a n d the Oxygen Sensor value is out of range or not present. Check the Oxygen Sensor wiring and the operation of the sensor.

The value should fluctuate between 0.02 and 0.85V. Slow fluctuation indicates a polluted Oxygen sensor and negative values indicate a damaged sensor. Note: Cars without Catalytic Convertors will incorrectly store this code.