Technical Definition:

Injector Circuit / Open (Cylinder No.12)

Technical Description:

Possible Causes:

Possible Symptoms:

• Bad injector. This is usually the cause of this code but doesn’t rule out the possibility of one of the other causes
• Open in the wiring to the injector
• Short in the wiring to the injector
• Bad PCM

Injector Circuit Malfunction Cylinder 12

Possible Solutions:

• First, using a DVOM check the resistance of the injector. If it isn’t within specs, then replace the injector.
• Check for voltage at the fuel injector connector. It should have 10 volts or more.
• Visually check the connector for damage or broken wires.
• Visually check the injector for damage.
• If you have access to an injector tester, activate the injector and see if it operates. If the injector operates, then you likely have either an open in the wiring, or a blocked injector. If you do not have access to a tester, swap the injector with another one and see if the code changes. If the code changes, then change the injector.
• At the PCM, remove the driver wire from the PCM connector and Ground the wire. (Make sure you have the correct wire. If you’re not sure, do not attempt) The injector should activate
• Replace the injector

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty fuel injector 12
– Fuel Injector 12 harness is open or shorted
– Fuel injector 12 circuit poor electrical connection

Specific Makes:

– Lack/Loss of Power
– The engine may be harder to start
– Engine hesitation