2020 Ram 2500 Key Fob Programming Guide

Quick Reference

Step-by-Step On-Board Programming

Unfortunately, the 2020 Ram 2500 does not support DIY on-board key fob programming. This means you cannot program a new key fob yourself simply by following a sequence of steps in the vehicle. The advanced security systems in modern Ram trucks, including the 2020 2500, require specialized diagnostic equipment to add or replace key fobs.

This typically involves a professional-grade scan tool that connects to the vehicle's OBD-II port. The tool communicates with the truck's Body Control Module (BCM) to register the new key fob's unique identification code. This process ensures the highest level of security for your vehicle and prevents unauthorized key duplication.

Therefore, to program a new key fob for your 2020 Ram 2500, you will need to visit a dealership or a qualified automotive locksmith.

Battery Replacement

The key fob for your 2020 Ram 2500 uses a CR2450 coin cell battery.

To replace the battery:

1. Locate the emergency key release: There's a small button or switch on the side of the key fob. Press it, and pull out the emergency key blade.
2. Separate the fob casing: With the emergency key removed, you'll see a slot where the key blade was. Use a small, flat-head screwdriver or a coin to carefully pry open the two halves of the key fob casing. Be gentle to avoid damaging the plastic.
3. Remove the old battery: Note the orientation of the old battery (usually positive side up). Carefully pry it out.
4. Insert the new battery: Place the new CR2450 battery into the compartment with the positive (+) side facing up, matching the orientation of the old battery.
5. Reassemble the fob: Align the two halves of the key fob casing and firmly press them back together until they snap securely. Reinsert the emergency key blade.

Where to Buy a Replacement Fob

When it comes to purchasing a replacement key fob for your 2020 Ram 2500, you have a few options, each with its own pros and cons:

• Dealership:

  • Pros: Guaranteed to be an OEM part, programmed correctly, and they handle any necessary key blade cutting. You're assured of compatibility and proper functionality.
  • Cons: Most expensive option. Expect to pay anywhere from $250 to $400 or more for the fob and programming.

• Automotive Locksmith:

  • Pros: Often more affordable than a dealership ($150 to $300 including the fob, cutting, and programming). Many mobile locksmiths can come to your location, offering convenience. They have the necessary diagnostic tools.
  • Cons: Ensure the locksmith specializes in automotive keys and has experience with Ram vehicles. Verify they use quality aftermarket or OEM equivalent fobs.

• Online Retailers (e.g., Amazon, eBay):

  • Pros: Cheapest option for the fob itself (often $30-$100). Wide selection of aftermarket fobs.
  • Cons: You still need to pay for programming and key cutting separately. There's a risk of buying a non-compatible or low-quality aftermarket fob. You'll need to verify the FCC ID (OHT-4882006) and OEM part numbers (68442937AC, 68442937AB, 68442937AA, 68374971AB) carefully. The total cost, including separate programming and cutting, might approach that of a locksmith.

If On-Board Programming Isn't Supported

As mentioned, on-board programming is not an option for your 2020 Ram 2500. This means you will incur costs for professional programming services.

Your key fob also contains an immobilizer transponder chip. This chip communicates with your vehicle's immobilizer system, allowing the engine to start. Even if you get an aftermarket fob, it must have the correct transponder chip and be programmed to your vehicle alongside the remote functions. Without a properly programmed transponder, your truck will not start, even if the remote functions work.

Expect programming costs from a dealership or locksmith to range from $75 to $150 purely for the programming service, on top of the cost of the replacement fob and any key cutting. Always get a quote beforehand.

Find a mobile locksmith or shop on Repairius.