Are you having trouble with your Jeep’s code P1685? This code is known as the Smart Key Immobilizer Module Invalid Key code. It is triggered when the Powertrain Control Module (PCM) receives a message from the Smart Key Immobilizer Module (SKIM) that an invalid key has been inserted. This code can be triggered for various reasons, from theft attempts to using an incorrect key. To address this code, you must take a few steps to diagnose and fix it.
🎯Suggested article: Jeep Code P2463
Causes and Solutions of Jeep Code P1685
| Cause | Solution |
|---|---|
| Theft attempt | Obtain the correct key and attempt to start the vehicle |
| Using an incorrect key | Do a PCM Reset function to clear the code after engine startup |
| Damaged SKIM module | Replace the SKIM module |
| Damaged Wiring | Check the wiring for any damage and repair accordingly |
Theft Attempt
If you are getting the Jeep Code P1685, it could result from a theft attempt. This is when an incorrect key is inserted into your vehicle’s ignition. The Powertrain Control Module (PCM) will detect this and signal to the Smart Key Immobilizer Module (SKIM) that an invalid key has been inserted. In this case, the solution is to obtain the correct key and attempt to start the vehicle. If the car starts, the code should be cleared, and the problem should be resolved.
Using an Incorrect Key
Another potential cause of the Jeep Code P1685 is that you are using an incorrect key. This can happen if you have multiple keys that look similar but are not the correct keys for your vehicle. If so, you must do a PCM Reset function to clear the code after engine startup.
⚡️Other article: Jeep Code P0344
Damaged SKIM Module
If the SKIM module is damaged, it can also cause the Jeep Code P1685 to be triggered. In this case, you must replace the SKIM module to resolve the issue.
Damaged Wiring
The last potential cause of the Jeep Code P1685 is damaged wiring. If the wiring harness is damaged, it can cause the code to be triggered. In this case, you must check the wiring for damage and repair accordingly.
Conclusion
The Jeep Code P1685 warns that something is wrong with your vehicle’s key system. It can be triggered for various reasons, from theft attempts to using an incorrect key. To address this code, you must take a few steps to diagnose and fix it. Depending on the cause of the code, the solution can range from obtaining the correct key to replacing the SKIM module or checking and repairing the wiring. To ensure that your Jeep Code P1685 is addressed properly, it is important to take the steps necessary to diagnose and fix the issue.
⚡️Other article: Jeep Code U1134
Was this page helpful?