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P0203 - Injector Circuit Malfunction Cylinder 3

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?
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Possible causes
- Faulty fuel injector 3
- Fuel Injector 3 harness is open or shorted
- Fuel injector 3 circuit poor electrical connection
What does this mean? What does this mean?
When is the code detected?
The P0203 is set if the Engine Control Module (ECM) is detects a low or high voltage drop or resistance at the injector 3.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of Power
- The engine may be harder to start
- Engine hesitation
P0203 Description

Engine Control Module (ECM) checks the injectors circuit resistance and monitors the voltage drop during normal operation. The ECM will trigger the P0203 code when the resistance or voltage drop at the injector 3 is out of specifications.

P0203 Information for specific makes
P0203 BMW Fuel Injector, Cylinder 3 Activation
P0203 BUICK Injector 3 Control Circuit
P0203 CADILLAC Injector 3 Control Circuit
P0203 CHEVROLET Injector 3 Control Circuit
P0203 CHRYSLER Fuel Injector 3 Circuit Open
P0203 DODGE Injector Circuit Malfunction Cylinder 3
P0203 FORD Injector Circuit Malfunction Cylinder 3
P0203 GMC Injector 3 Control Circuit
P0203 HYUNDAI Injector Circuit Open- Cylinder 3
P0203 ISUZU Injector 3 Control Circuit
P0203 JAGUAR Injector Circuit Malfunction Cylinder 3
P0203 JEEP Injector Circuit Malfunction Cylinder 3
P0203 KIA Injector Circuit Open- Cylinder 3
P0203 LEXUS Injector Circuit Open Cylinder 3
P0203 MAZDA Injector Circuit Open Cylinder 3
P0203 MERCEDES-BENZ Injector Circuit Malfunction Cylinder 3
P0203 MITSUBISHI Injector Circuit Cylinder 3
P0203 NISSAN Number 3 Fuel Injector Circuit Open
P0203 PONTIAC Injector 3 Control Circuit
P0203 SATURN Injector 3 Control Circuit
P0203 VOLKSWAGEN Injector Circuit Open Cylinder 3
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Repair Importance Level: 3
1=Low 2=Medium 3=High What does this mean?
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard What does this mean?
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