P0203 BMW Fuel Injector, Cylinder 3 Activation
Possible causes
– Faulty fuel injector 3
– Fuel Injector 3 harness is open or shorted
– Fuel injector 3 circuit poor electrical connection
– Fuel Injector 3 harness is open or shorted
– Fuel injector 3 circuit poor electrical connection
What about the obd code?
The P0203 BMW is set if the Engine Control Module (ECM) is detects a low or high voltage drop or resistance at the injector 3.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Lack/Loss of Power
– The engine may be harder to start
– Engine hesitation
– Lack/Loss of Power
– The engine may be harder to start
– Engine hesitation
P0203 BMW Description
Engine Control Module (ECM) checks the injectors circuit resistance and monitors the voltage drop during normal operation. The ECM will trigger the P0203 BMW code when the resistance or voltage drop at the injector 3 is out of specifications.
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