U0550 code meaning
Invalid Data Received From Side Obstacle Detection Control Module D
What U0550 means
Module D is the fourth radar of a side obstacle system, in Ford terms SODCMD alongside SODL, SODR and SODCMC. Which corner it serves depends on the vehicle and is not stated in the public Ford bulletins. U0550 has no published manufacturer description; a module receiving data from unit D sets it when that data proves invalid, for example a signal outside its range or a sequence error. Because these radars sit in bumper corners, impact damage, a bent bracket or water in the plug often come before network faults, and after a bumper repair the replacement module must be given the vehicle's configuration (Ford SSM 51903). The driver notices side assistance or cross traffic alerts disabled, not a drivability problem. U024F is total loss; module C is U054F.
U0550 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.3 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0550
- Side assistance or cross traffic alert switched off
- Warning message about a blocked or faulty sensor
Common causes of U0550
- PossibleRadar D or its bracket damaged by a bumper impact
- PossibleWater ingress or corrosion at the module D connector
- PossibleReplacement module D without vehicle configuration
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Side obstacle detection module d
What each part of U0550 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 50 | The exact fault in that area. |
What to do next
- Note U0550 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 U0550
What does U0550 mean?
U0550 means "Invalid Data Received From Side Obstacle Detection Control Module D". Module D is the fourth radar of a side obstacle system, in Ford terms SODCMD alongside SODL, SODR and SODCMC. It is a generic code, so it means the same on every make.
Is it safe to drive with U0550?
U0550 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0550 fail an emissions test?
U0550 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 U0550 to fix?
Difficulty: medium. A typical repair takes 0.3 to 3 hours of work. This is a job for a workshop.
Will U0550 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.