DIY Ram Promaster Key Fob Programming: Save Money and Time

Dealing with car key fobs can be unexpectedly expensive and inconvenient, especially when you need a replacement or an extra one. If you own a Ram Promaster, you might have heard stories about hefty dealer charges and long waiting times for a new key fob. This guide shares a personal experience and provides a step-by-step approach to programming an aftermarket key fob for your Ram Promaster, potentially saving you a significant amount of money and time compared to going through a dealership.

Like many, I discovered the hard way that getting a spare key for my pre-owned 2014 Promaster 3500, which only came with one remote and one regular key, could be a costly affair at the dealership. Rumors of hundreds of dollars in charges due to “pre-coding” requirements and weeks or even months of waiting due to key backlogs were discouraging. Determined to find a more affordable and faster solution, I decided to explore alternative options for obtaining and programming a new key fob.

My journey started with an online purchase. I bought a key fob from Amazon for around $30. Visually, it was identical to my original remote, although the cargo area unlock button featured a car trunk icon instead of the exact van symbol. With the key in hand, the next step was to get it cut and programmed. I initially visited a Batteries Plus Bulbs location. While the first store I tried was hesitant due to the perceived complexity of the programming procedure, another Batteries Plus location was willing to take on the task. However, they encountered an issue with key cutting. Consequently, they referred me to a nearby locksmith.

The locksmith successfully cut the key for $20, but unfortunately, they lacked the necessary “pre-coding” device required for Ram Promaster keys. This led me back to Batteries Plus. With the key now cut, they were able to proceed with both pre-coding and programming. It’s crucial to note that I brought both my existing remote and regular key with me because the programming process requires ALL keys to be programmed or re-programmed simultaneously.

Based on my experience at Batteries Plus, here are some procedure remarks using their device:

• Firmware Options: The device offered two firmware choices: CJD_AP16 for 2500/3500 models and CJD_AP12 for 1500 models. Ensure the correct firmware is selected for your Promaster model.
• Key Types: For flip key remote pre-coding, the required key type is PCF7946. For transponder keys, the type is PCF7936. Using the correct key type is essential for successful programming.
• OBD2 Port Access and Smartbox Reset: To access the necessary connection point, you’ll need to locate the OBD2 port, typically found on the lower left side under the steering wheel. Two screws next to the OBD2 port need to be removed to access a large gray clip with two red wires. Unplugging this clip is crucial for resetting the smartbox after pre-coding and before initiating key programming. This step is vital for the system to recognize the new key.
• Pincode Importance: A pincode is MANDATORY for the programming stage. During the pre-coding process, this pincode will be displayed on the programming device. It is highly recommended to take a picture of this pincode with your phone as a backup in case you need it again.
• Programming Sequence: Follow the on-screen prompts carefully. Typically, you start by programming the new key first. Once the new key is programmed, you will be prompted to program the old keys. This usually involves bringing the old keys close to the ignition switch without removing the newly programmed key. While we initially disassembled the new key to insert only the cut metal part during programming as a precaution, it’s likely not necessary to remove the electronics (transponder).
• Pincode Consistency: Interestingly, the pincode remained the same even when using different programmer brands, suggesting some consistency in the security system. However, pre-coding data, remote pre-coding data, and CS code might not be transferable across different programmers, so it’s best to complete the entire process with one device if possible.
• Remote Activation: After programming, the remote functionality may not activate immediately. It might take approximately 5-10 seconds of keeping the key in the ignition and turning the ignition to the “ON” position for the remote features to become active. Simply programming the key is not enough to enable the remote functions; this additional step is required.

Key Takeaways:

• Avoid Dealership Costs: You don’t necessarily need to go to a dealership for new Ram Promaster keys. Independent options are available and significantly cheaper.
• Locksmith and Pre-coder: Any locksmith equipped with a key cutting machine and a pre-coder device should be capable of programming a Ram Promaster Key Fob.
• Pre-coder Availability: While most locksmiths can cut keys, pre-coder devices are less common due to subscription or usage-based service models.
• Batteries Plus as an Option: Almost all Batteries Plus Bulbs locations are likely to have pre-coder devices, even if they don’t all offer key cutting services. They can be a convenient one-stop-shop if they offer both services or in conjunction with a locksmith for cutting.
• Emergency Reset: In the event of programming mishaps that leave your van unable to start with the original key (computer stuck in programming mode), a simple reset can be performed. The battery is located under the driver’s side floor. Access it by removing the floor flap and disconnecting the negative battery terminal for a few seconds before reconnecting it. This will reset the van’s computer and should allow you to start the engine again.

By following these steps and understanding the process, you can successfully program a new key fob for your Ram Promaster, saving yourself considerable money and avoiding the potential hassles of dealership service.