U0545 code meaning
Invalid Data Received From Running Board Control Module A
What U0545 means
Power running boards deploy when a door opens and retract when it closes or the vehicle moves; a running board control module (Ford: RBM) drives the motors and reports position and faults. U0545 means its data reach other modules but are rejected. Ford shows how closely the function is tied to other electronics: on the 2027 Expedition and Navigator the boards stopped and the cluster warned of a running board fault while the driver seat module held C1008:15/C1009:15 and other modules stored U0208 and U0244, traced to DSM software (SSM 55168). Earlier F-150, Super Duty and Expedition RBMs switched from Auto to Off after low battery voltage with U3003:16 (SSM 50154) or due to software (SSM 52411). No bulletin names U0545. Boards may stay extended or retracted.
U0545 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0545
- Running boards do not deploy or retract, fault message in the cluster
- Running board setting changes from Auto to Off by itself
Common causes of U0545
- PossibleSoftware fault in the running board or hosting seat module
- PossibleLow battery voltage event corrupting module data
- PossibleImplausible motor position feedback from dirt, ice or corrosion at the board
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Running board module a
What each part of U0545 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 45 | The exact fault in that area. |
What to do next
- Note U0545 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U0545
What does U0545 mean?
U0545 means "Invalid Data Received From Running Board Control Module A". Power running boards deploy when a door opens and retract when it closes or the vehicle moves; a running board control module (Ford: RBM) drives the motors and reports position and faults. It is a generic code, so it means the same on every make.
Is it safe to drive with U0545?
U0545 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0545 fail an emissions test?
U0545 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U0545 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will U0545 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.