OBD-II trouble code
U0454: Invalid Data Received From Side Restraints Control Module (Right)
Implausible data from the right side restraints module. This is the side that carries occupant classification, so the complaint often arrives as a passenger airbag indicator behaving oddly rather than as an SRS lamp — and liquid spilled into the footwell is a leading cause here that has no equivalent opposite it.
Quick facts
- System
- Network
- Category
- Network Communication
- Severity
- High severity
- Drivable
- Usually safe to drive short-term
- Repair cost range
- $100 – $1,200
- DIY difficulty
- Shop recommended
What does U0454 mean?
A receiving module has rejected the contents of a message from the right side restraints module. The bus is healthy and the module is transmitting; the problem is that a value inside those transmissions is out of range or inconsistent with what the rest of the network reports. That distinction matters because it points diagnosis toward configuration, supply quality and corruption rather than toward a dead wire.
The right side of the cabin is a different environment from the left, in ways that shape both the cause and the symptom.
Start with the symptom, because it is the part owners actually notice. The passenger side is where occupant classification lives — the seat weight and position sensing that decides whether the front passenger airbag should be armed or suppressed, together with the illuminated indicator that announces which state it is in. Those restraint functions exchange data across the same network segment as the side module. So a right-side invalid-data fault frequently presents not as a bare SRS lamp but as the passenger airbag indicator behaving in a way the owner can see: showing off with an adult sitting there, or flickering between states. No left-side fault can produce that complaint, and its presence is a strong hint that the fault sits on this side before a scan tool has confirmed anything.
Then the cause. The passenger footwell and seat base are where drinks are set down, where bottles roll, and where bags get put — and side restraints modules are mounted low, at the rocker, the pillar base or under the seat, which is exactly where spilled liquid ends up. Liquid contamination of a low-mounted connector is a documented failure route for these modules, and it is disproportionately a right-side event because of how people use the space. It also has a signature worth recognising: it appears once, days or weeks after the spill as corrosion develops, and it does not correlate with anything the driver did that day.
The passenger seat contributes a third route. It is the seat that child restraints are anchored into and removed from, the one folded or removed to carry cargo, and the one whose trim gets pulled to fit accessories. Each of those disturbs the harness and the connectors underneath it, and a fault that begins immediately after a child seat installation or a cargo-carrying trip is describing mechanical disturbance rather than gradual failure.
One population caveat that is easy to miss. Everything above assumes left-hand drive. On a right-hand-drive vehicle the right side is the driver's side, the seat moves constantly, occupant classification sits opposite, and the spill argument moves with it. The code still means the right module — sides are defined by the vehicle, not by who sits where — but the reasoning about which failure is likely swaps over entirely.
Whatever the route, the consequence is serious. A module whose data cannot be trusted typically has its deployment authority withdrawn, leaving the passenger-side thorax and curtain airbags potentially inert while the car drives perfectly. And before any wiring is condemned, check whether the module was recently replaced: an unconfigured or copied unit will produce invalid data indefinitely regardless of how good the harness is.
Common causes
- Liquid spilled into the passenger footwell or seat base reaching the low-mounted module or its connector
- Corrosion developing at a contaminated connector weeks after the spill that caused it
- Right side restraints module fitted without correct programming or configuration for the vehicle
- Harness or connector disturbed during child seat installation, seat folding or cargo work
- Low system voltage or a poor ground pushing reported values out of range
- Bus wiring chafed along the passenger door or seat harness route
- Module damaged or moved during collision repair on that side
- Internal failure of the right side restraints module
Symptoms
- Passenger airbag status indicator showing off or flickering with an adult occupant seated
- Airbag / SRS warning lamp on with a service message
- Passenger-side thorax and curtain deployment withdrawn as a fail-safe
- Occupant classification codes stored alongside the network code
- Fault first appearing some time after a drink was spilled in that footwell
- Vehicle starting and driving normally with no hint that protection has been reduced
Diagnostic steps
- 1.Note whether the passenger airbag indicator is misbehaving as well as the SRS lamp. That combination localises the problem to this side before any testing.
- 2.Ask about liquid spills in the passenger footwell over the previous weeks. Corrosion from a spill shows up well after the event and will not correlate with anything recent.
- 3.Scan the restraints system with a tool that can access it and capture occupant classification codes alongside the network fault — they often share a cause here.
- 4.Check whether the module has been replaced or reprogrammed. An unconfigured unit transmits values the receiver will always reject.
- 5.Remove the sill or rocker trim and inspect the module's mounting area and connector for staining, residue and green corrosion at the terminals rather than only at the connector face.
- 6.Establish whether a child restraint was fitted or the seat folded or removed shortly before the fault appeared, and inspect what that work would have disturbed.
- 7.Verify battery condition, charging voltage and the module's ground before pursuing intermittent causes.
- 8.On a right-hand-drive vehicle, reverse the reasoning above — this becomes the driver's side and seat-travel harness fatigue becomes the leading candidate.
- 9.Follow the manufacturer's disable-and-wait procedure before any hands-on restraints work.
Repair cost
$100 – $1,200
Cleaning and re-terminating a spill-damaged connector is $150 to $450, more where corrosion has travelled into the harness and a section must be replaced. Programming or configuring the module, where that alone is the fault, is $100 to $350. Voltage and ground corrections are $150 to $450. Replacing the module with programming reaches roughly $350 to $1,000. Liquid damage that also reached the occupant classification wiring raises the total, because both have to be made good before the lamp will stay out.
Estimate your repair
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Open the Repair Cost Estimator with control module replacement & programming preselected. Adjust labor rate and vehicle category to fit your situation.
DIY vs shop
Leave this one to a qualified shop. It typically involves emissions-critical components, refrigerant handling, or other work that requires manufacturer-grade tooling, training, or certification. DIY attempts often produce a more expensive problem than the original code.