Injector circuit open causing misfire, codes P0201 and P0301

2007 JEEP GRAND CHEROKEE
101,000 MILES • 3.7L • 6 CYL • 4WD • AUTOMATIC
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MGILLDESIGN79
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Hello, my vehicle upon startup (recently) has been generating code P0201-Injector Circuit Open - Cylinder 1/ P0301 - Cylinder 1 Misfire.

To troubleshoot, we replaced all spark plugs, and the coil pack (on cylinder 1). The codes were reset, but came back on after driving (once engine got warm). Could the injector itself be bad? Thanks
Jul 25, 2019 at 11:41 AM
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SCGRANTURISMO
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Hello,

Yes it could be. A fuel injector is nothing but a simple on/off solenoid. It has electrical parts in it that could very well develop an open in the circuit and quite working. This would also cause Direct Trouble Code (DTC) P0301 to set as well. If you are going to replace the fuel injector, I would recommend purchasing a fuel injector of Original Equipment Manufacturer (OEM) quality or better, and not a cheap Chinese injector of Ebay for $10.00. These knockoff fuel injectors that have flooded the market are cheaply made, notoriously unreliable, and, in fact, can cause major engine damage, should they fail at the right time. Please keep us informed as to how everything is progressing.

Thanks,
Alex
2CarPros
Jul 25, 2019 at 12:52 PM
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MGILLDESIGN79
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Thank you. I appreciate it.
Jul 25, 2019 at 2:17 PM
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STRAILER
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Here is how you test the injector before you install it

https://www.2carpros.com/articles/how-to-test-a-fuel-injector

Please let us know what you find. We are interested to see what it is.
Jul 28, 2019 at 5:11 PM