2023 Kenworth T680 Key Fob Programming Guide
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Quick reference
| Item | Detail |
|---|---|
| FCC ID | N5F-A08TAA |
| OEM Fob PN | P57-1115-104 (or similar, verify with dealer) |
| Aftermarket Options | Strattec 5928821, Dorman 13745 |
| Battery Type | CR2032 |
| Programmable On-Board? | No |
| Cuts Required? | Yes, for integrated key |
Step-by-step on-board programming
The 2023 Kenworth T680 does not support DIY on-board key fob programming. This means you cannot program a new key fob yourself using a series of key turns or door open/close cycles.
Programming new key fobs for your Kenworth T680 requires specialized diagnostic equipment connected to the vehicle's onboard computer. This equipment is typically found at a Kenworth dealership or a qualified automotive locksmith.
Attempting to program a new key fob without the correct tools can lead to issues with your vehicle's security system and render the new fob inoperable. It's crucial to rely on professionals for this task to ensure proper functionality and avoid any damage to the vehicle's electronics.
Battery replacement
Replacing the battery in your Kenworth T680 key fob is a straightforward process:
- Locate the seam: Look for a small seam along the edge of the key fob casing.
- Pry open: Use a small, flat-head screwdriver or a coin to carefully pry open the two halves of the fob along the seam. Work gently to avoid damaging the plastic.
- Remove old battery: Note the orientation of the old battery (CR2032). Carefully remove it from its compartment.
- Insert new battery: Place the new CR2032 battery into the compartment, ensuring it's oriented correctly (positive side typically facing up).
- Reassemble: Snap the two halves of the key fob back together firmly until you hear a click. Test the fob to ensure it's working.
Where to buy a replacement fob
When looking for a replacement key fob for your Kenworth T680, you have a few options, each with its own pros and cons:
-
Kenworth Dealership:
- Pros: Guaranteed genuine OEM part, often comes with programming included, expertise in Kenworth vehicles.
- Cons: Most expensive option. Expect to pay $200 - $400 or more for the fob and programming.
-
Automotive Locksmith:
- Pros: Can often provide and program OEM or high-quality aftermarket fobs, typically more affordable than a dealership, many offer mobile services.
- Cons: Ensure the locksmith specializes in commercial vehicles like Kenworth. Prices vary, but expect to pay $150 - $300 for a fob and programming.
-
Online Retailers (e.g., Amazon, eBay):
- Pros: Potentially the cheapest option for the fob itself.
- Cons: You're only buying the physical fob; programming and key cutting are separate costs. Risk of counterfeit or incompatible fobs. You'll still need to pay a locksmith or dealer for programming. A basic aftermarket fob might cost $40 - $80, but add $100 - $200 for programming and cutting.
If on-board programming isn't supported
Since on-board programming is not an option for the 2023 Kenworth T680, you must use a professional service to get a new key fob programmed. This means factoring in the cost of both the key fob and the programming service.
Cost Expectations:
- Dealer: As mentioned above, anticipate the highest cost due to dealership labor rates and genuine parts. This option often includes key cutting if your fob has an integrated key blade.
- Locksmith: A reputable automotive locksmith will have the necessary diagnostic tools to program your Kenworth T680 key fob. Their labor rates are generally lower than a dealership, making them a cost-effective alternative. Many locksmiths can also cut the integrated key blade on-site.
Immobilizer Transponder:
The Kenworth T680 utilizes an immobilizer system that requires the key fob to have a programmed transponder chip. This chip communicates with the vehicle's engine control unit (ECU) to allow the truck to start. If the transponder is not correctly programmed, the truck will not start, even if the key blade is cut correctly and the remote functions work. This is another reason why professional programming is essential.
Find a mobile locksmith or shop on Repairius.
More specs for the 2023 Kenworth T680
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Same spec — other model years
Maintenance & repair guides
2023 Kenworth T680 Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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Values can vary by engine, trim and build date; check your VIN-specific service information. Updated 2026-06-24.