OBD-II trouble code
U0429: Invalid Data Received from Steering Column Control Module
A module is still hearing from the steering column control module, but the data is implausible or out of range. The link is alive — the content is wrong. Often a column sensor, calibration, or internal fault, or a network issue corrupting the data. Steering and stability features may disable themselves.
Quick facts
- System
- Network
- Category
- Network Communication
- Severity
- Medium severity
- Drivable
- Usually safe to drive short-term
- Repair cost range
- $100 – $900
- DIY difficulty
- Shop recommended
What does U0429 mean?
U0429 is an 'invalid data' code rather than a 'lost communication' code. A receiving module is still hearing from the steering column control module, so the connection is alive. The problem is the content of the messages: a value is out of range, implausible, missing, or contradicts other inputs. The column module is talking, but what it's saying doesn't make sense, so the receiving module rejects the data and stores U0429.
The steering column control module handles functions tied to the column — depending on the vehicle that can include the steering angle/position signal, multifunction stalk inputs, tilt/telescope adjustment, the clockspring connection, and on some vehicles the electric power steering interface. Because the fault is the content of the data rather than the link, the causes lean toward whatever makes the module report bad information. A failing column-mounted sensor or an uncalibrated steering position reference can produce an implausible value. The module's calibration or software can be outdated, corrupted, or mismatched after a replacement or reflash. The clockspring or column wiring can be damaged, the connector can corrode, or the module can have an internal fault. The usual network issues — low system voltage, electrical noise, a marginal bus — can also corrupt good messages.
The symptoms depend on which data is invalid. Because steering-related signals often pass through this module, you may see stability control, traction control, lane-keeping, or electric power steering assist disable themselves and light their warning lamps, along with possible issues with steering-wheel controls. Often U0429 is a secondary code set by a module complaining about data that a column-specific fault explains. The car still steers mechanically, but the lost driver aids make prompt diagnosis worthwhile.
Common causes
- Failing column-mounted sensor or uncalibrated steering position reference
- Accompanying steering/chassis fault producing the invalid value
- Outdated, corrupted, or mismatched column module calibration/software
- Damaged clockspring or column wiring
- Steering column control module internal fault
- Corroded or loose column module connector
- Low system voltage causing implausible data
- Module replaced or reflashed without correct programming or calibration
Symptoms
- Stability control and traction control warning lights on
- Steering-assist or lane-keeping features disabled
- Electric power steering assist reduced or inconsistent on some vehicles
- Steering-wheel control buttons behaving oddly
- Multiple related steering/network codes stored alongside U0429
- Symptoms sometimes appear after a battery service or column work
- Car still steers and drives mechanically
Diagnostic steps
- 1.Read ALL stored codes first — U0429 is often secondary to a steering/chassis code that names the bad signal.
- 2.Address any companion codes and perform a steering angle calibration if a position reference is involved.
- 3.Check system voltage and the battery/charging system; low voltage can cause implausible data.
- 4.Verify the column module has the correct, current calibration — especially after a replacement or reflash.
- 5.Inspect the clockspring, column wiring, and connector for damage or corrosion.
- 6.Use live data to confirm the questioned value against actual conditions before replacing the module.
Repair cost
$100 – $900
Cost depends on what's producing the bad data. A steering angle calibration may be only $80-$200 if that's the issue. Clockspring or wiring repair runs $150-$600. A calibration update/reflash is typically $100-$300. Steering column control module replacement and programming is the expensive case at $400-$900+, but it should only follow thorough diagnosis. Because U0429 is frequently a secondary code, fixing the companion fault often clears it.
Estimate your repair
Run the numbers for your vehicle
Open the Repair Cost Estimator with module communication / can bus diagnosis 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.