That's the Code i'm getting! Along with a flashing Engine Light, a Slightly rough idle and the dreaded Service Active Handling warning. My Code Reader says Open Injector Circuit. Is this a bad Injector or a bad connection? And help is appreciated! I'd hate to have to take the car to a Stealership for an easy fix I can do at home! Thanks fellas!

 

DTC P0207: Injector 7 Control Circuit



Circuit/System Description
The control module enables the appropriate fuel injector pulse for each cylinder. Ignition voltage is supplied to the fuel injectors. The control module controls each fuel injector by grounding the control circuit via a solid state device called a driver. The control module monitors the status of each driver. If the control module detects an incorrect voltage for the commanded state of the driver, a fuel injector control circuit DTC sets.

Circuit/System Testing
Ignition OFF, disconnect the affected fuel injector harness connector at the fuel injector.
Ignition ON, verify that a test lamp illuminates between the ignition 1 voltage circuit terminal A and ground.
⇒ If the test lamp does not illuminate, test the ignition 1 voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition 1 voltage circuit fuse is open, test or replace the fuel injector.

Connect the J 34730-405 between the control circuit terminal B and the ignition 1 voltage circuit terminal A.
Command the fuel injector ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
⇒ If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the engine control module (ECM).

⇒ If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.

If all circuits test normal, test or replace the fuel injector.

Component Testing
Important: The engine coolant temperature (ECT) sensor must be between 10-32°C (50-90°F) for an accurate measurement.

Measure for 11-14 ohms of resistance between the terminals of the fuel injector.

⇒ If the resistance is not within the specified range, replace the fuel injector.

 

Look for the simple stuff, loose or dirty connector on the top of the injector, #7 is the rear one on the drivers side, towards the firewall.
Higher mileage cars could have a bad injector, being clogged perhaps.
Not sure but if there is a multi pin connection for all the injectors to the harness, could be another place to look at.

 

I'm headed out to take a look now! I checked the connections last night and they are all fine! Stay Tuned!

 

Look around for a cut or pinched wiring or fraying insulation because it's laying on a sharp edge of a bracket or something similar.

 

Ok I'm getting power to the injector. Car also runs the same with the injector unplugged. I'm pretty sure it's a bad injector.

actually the car runs a lil rougher when I unplug it.

 

Great price if it fits:

 

Great price....But it's used!

 

Can't beat this deal.......
http://www.ebay.com/itm/One-New-42LB...53.m1438.l2649

 

so what happened? Did this fix your problem? My Yukon Denali with l92 did this but once I got down the road it ran smooth and the code went away. Mine has only 116k miles

 

Yes it fixed it! Haven't had any issues since!

 

great. I'll order myself a set then. Thank you kindly

 

Well the problem is back! I'm getting the same code plus a 0300 code! UGH! Bad coil perhaps?

 

Exhaust also smells bad! Like eggs!

 

OK! I sprayed the #7 coil with WD40 waited about 30 min and restarted the car. It runs fine and no codes are being done. I'm going to replace the coil!