You press the remote start button on your 2015 F-350 key fob and get absolutely nothing. No engine crank, no flashing lights, no confirmation beep. Yet the same fob still locks and unlocks the doors just fine. If this sounds familiar, you are not alone. The 2015 F-350 remote start not working issue affects many owners, especially those running the 6.7L Powerstroke diesel. The frustrating part is that the truck otherwise runs perfectly with no warning messages on the dash.
The good news is that most fixes take less than 30 minutes and require no dealer visit. While Ford’s factory remote start hardware is generally reliable, a few hidden culprits like a bent hood switch or a stuck upfitter switch can silently block activation. This guide walks you through the exact troubleshooting steps in order, from the most common cause to advanced diagnostics.
Why a Bent Hood Switch Silently Blocks Your 2015 F-350 Remote Start
The number one reason your 2015 F-350 remote start not working problem exists is a misaligned hood switch. Even when the hood looks fully closed and no warning light appears, a slightly bent switch can prevent the system from activating.
How the Hood Switch Fools the System
Ford’s remote start logic confirms every entry point is closed before allowing startup. This includes doors, tailgate, and the hood. The hood switch sits near the latch on the driver’s side and must fully depress when the hood closes. If it bends even slightly downward, it never registers as closed, and the system silently refuses to start.
On 2015 models, the instrument cluster often does not display a hood open warning like newer trucks do. So you can have a faulty switch with zero visual cues on the dash.
How to Test and Fix the Hood Switch
- Open the hood and locate the small black switch near the latch on the driver’s side
- Visually inspect for any bend or recess
- Use a flathead screwdriver to gently bend the switch upward by 1 to 2 mm
- Close the hood and listen when you lock the truck with the remote:
– One beep means an entry point is still registering open (likely the hood)
– Two beeps mean all points are closed and remote start should work
Test remote start after each small adjustment. Even a tiny bend correction can make the difference.
Pro Tip: If you recently had service work done like an oil change, the technician may have bumped the switch. That is the most common cause of sudden remote start failure.
Reset the CAN Bus Network After a Battery Disconnect
If your remote start stopped working right after a battery disconnect, the issue lies in Ford’s CAN bus safety logic, not a dead battery or blown fuse.
Why Battery Work Breaks Remote Start on the 2015 F-350
When power is interrupted (such as during brake service), auxiliary systems can leave behind a stored fault flag. Even if everything works normally afterward, the Body Control Module blocks remote start as a safety measure. Common culprits include:
- Airbag disable switch
- Onboard air compressor
- Snow plow or work light controls
These accessories send signals over the CAN bus. If left on during a battery disconnect, the system thinks an accessory is active and disables remote start.
The Correct Reset Sequence
- Turn off every upfitter switch on the dash and under-hood panels
- Disconnect both batteries if your truck has a dual battery setup
- Wait at least 10 minutes to fully clear stored fault flags
- Reconnect the batteries in reverse order
- Test remote start
This sequence clears the BCM memory and allows remote start to function again.
Warning: Just disconnecting the battery is not enough. You must turn off every auxiliary switch first or the reset will not take.
Check If Remote Start Is Actually Activated
Many 2015 F-350s ship with factory remote start hardware pre-installed but disabled in software. If the system was never activated, no amount of troubleshooting will help.
Enable Remote Start in the BCM Using FOSSCAN
You can activate remote start yourself using free software and an OBD2 adapter.
Tools you need:
– FOSSCAN software (free download for Windows)
– OBD2 adapter compatible with Ford IDS
– Two already-programmed factory keys
Step by step:
- Connect FOSSCAN to the OBD2 port
- Navigate to Module Programming, then Body Control Module (BCM)
- Find parameter 7261901 (as-built)
- Change the second digit from 0 (disabled) to 1 (enabled)
- Write the change and disconnect
Activate the Remote Start Menu in the Cluster
- Navigate to Instrument Panel Cluster (IPC)
- Find parameter 72001
- Change the last character from 9 (disabled) to B (enabled)
- Save and restart the system
After reboot, the remote start menu will appear in your instrument cluster.
Verify Key Fob Programming and Battery Health
Even when the fob locks doors normally, it may not be programmed for remote start.
Test Both Fobs and Replace Batteries
- Try both remotes. If neither works, the issue is system-wide
- Replace key fob batteries even if they seem fine
- Verify the keys are factory programmed. Aftermarket keys often fail
Program a New Key to Your 2015 F-350
You need two already-programmed keys to add a third:
- Insert Key 1 and turn to On for 3 seconds, then remove
- Insert Key 2 and turn to On for 3 seconds, then remove within 10 seconds
- Insert the new key and turn to On. Doors should lock and unlock as confirmation
Now test remote start with the newly programmed key.
Inspect Remote Start Fuses and the Antenna Module
If software and switches check out, hardware is the next suspect.
Key Fuses to Check in the Under-Hood Box
Use a test light or multimeter to confirm power at each fuse:
- F2.25: Remote Start Module (20A)
- F2.34: BCM Power (10A)
- F2.41: Ignition Switch (15A)
Replace any blown fuses, but do not stop there. A blown fuse often points to a short or relay issue that needs further diagnosis.
Verify the Antenna Module Behind the Glovebox
The remote start antenna plugs into the TPMS module behind the glovebox:
- Remove the glovebox
- Verify the antenna module is securely plugged in
- Check for corrosion or bent pins on the connector
- Confirm the antenna is mounted above the glovebox, not dangling
A loose connection here kills signal reception even when everything else is working.
Scan for Hidden Fault Codes
If basic checks do not solve the 2015 F-350 remote start not working problem, run a diagnostic scan.
Common Codes That Block Remote Start
Use FOSSCAN or Ford IDS to check for these trouble codes:
- U0100: Lost communication with PCM
- U0140: Lost communication with IPC
- B1546: Key fob signal not received
These codes may not trigger dash warnings but can still block remote start activation.
Note: Ford IDS offers deeper diagnostics, but FOSSCAN covers roughly 90% of common issues at no cost.
Quick Checklist: 2015 F-350 Remote Start Not Working
Run through this list before scheduling any service:
- Hood switch bent? Bend it up 1 to 2 mm
- One beep when locking? Hood or door not registering closed
- Battery recently disconnected? Reset with upfitter switches off
- Remote start enabled in BCM? Check parameter 7261901
- Menu showing in cluster? Check IPC parameter 72001
