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P2317 Fault in 2007 Dodge Dakota 3.7L After PCM Replacement - Diagnosing Injector Signal Issue

Model: Dakota Fault Code: P2317 Posted: 2020-01-10 18:25

I recently replaced the Powertrain Control Module (PCM) in a 2007 Dodge Dakota 3.7L with a unit from Flagship One. The original PCM was functional but failed to send a signal to cylinder 6's injector, resulting in a P0306 misfire code. After installing the new PCM, the engine runs for only two seconds before shutting down and triggering a P2317 diagnostic trouble code (DTC). This behavior suggests an issue with either programming or hardware compatibility. The two modules have identical part numbers except for the last digit—'G' versus 'F'. I am wondering if this difference affects functionality. The old PCM did not cause engine shutdown, only a P0306 misfire. Injector testing confirmed that cylinder 6's injector is physically functional and receives power when manually actuated; both wiring harnesses are intact. I have reinstalled the original PCM temporarily to keep the truck operational. I'm now seeking insight into whether this P2317 code indicates a programming flaw, a hardware defect in the new module, or an underlying issue with cylinder 6's ignition system (such as a faulty coil or wiring). Could the P2317 be related to an intentional injector shutdown due to detected misfire? If so, how can I confirm this without relying on the PCM? Any advice on diagnosing this specific fault in a 2007 Dodge Dakota 3.7L with a new PCM would be greatly appreciated.

Related fault codes
P2317
Comments (8)
Anonymous 2020-01-10 20:26

Did you observe the P2317 code on the original PCM? What were the specific codes present when using the old module?

Anonymous 2020-01-10 20:38

If the P2317 appeared on the old module, it's likely that the PCM disabled injector #6 to protect the catalytic converter. This is known as an 'intentional injector shutdown' due to detected issues in cylinder 6 ignition. Possible causes include a broken or shorted control wire to the coil, a faulty spark plug coil, or a bad power feed from the ASD relay. To verify if this is intentional: clear the code and connect a Noid light to cylinder 6. When starting the engine, the Noid light should pulse for about two seconds before the PCM shuts off the injector driver—this confirms an intentional shutdown.

Anonymous 2020-01-10 20:40

Did the original PCM cause the engine to shut down?

Anonymous 2020-01-11 17:42

Autojoe wrote: Fri Jan 10, 2020 8:40 pm Did the original module cause an engine shutdown? No—there was no engine shutdown. The vehicle simply ran with a P0306 misfire.

Anonymous 2020-01-14 10:46

Thanks for all the input. I confirmed that the old PCM did not shut down the engine. It only displayed a P0306 code. I verified that cylinder 6's coil was receiving signal and firing properly. The injector itself does not receive any signal, but it works when manually tested (electronically actuated). Both wiring connections to the injector are confirmed good. For now, I’ve reinstalled the original PCM to keep the truck running.

Anonymous 2020-01-14 13:40

As long as a misfire code (like P0306) is stored, the PCM will disable the injector driver for cylinder 6 to protect the catalytic converter. Clear the DTC and connect a Noid light to cylinder 6. When starting the engine, the light should flash for about two seconds before shutting off—this confirms an intentional shutdown due to ignition issues in cylinder 6.

Anonymous 2020-01-14 15:17

Why does the original PCM function normally while the new one triggers a P2317? Are there known compatibility differences between modules with 'F' and 'G' suffixes?

Anonymous 2020-01-14 20:18

It seems odd that the old module showed a P0306 misfire on cylinder 6, while the new one reports a P2317—indicating an ionization problem in cylinder 6. Try reinstalling the original PCM and after clearing the code, monitor injection pulses for cylinder 6 during startup (first two seconds). If the injector driver is intentionally disabled, this confirms a misfire issue. Next, swap the coil from cylinder 6 to cylinder 5 and see if the P2317 moves to cylinder 5 (e.g., becomes P0305). This would point to a faulty coil. While I don’t believe a single-cylinder fault would cause a start stall, it’s worth testing. The original PCM may not be defective—this diagnostic test could clarify whether the issue lies in hardware or programming.