U0512: Invalid Data from Seat Control Module D
The U0512 code indicates a data integrity issue on the CAN bus, specifically involving invalid or erroneous data received from the Seat Control Module D (SCM-D). Unlike a total loss of communication, this code means the module is transmitting, but the data packets contain format errors, incorrect checksums, or values outside expected operating ranges. The PCM or other modules reject this data, triggering the fault. This is a low-severity issue that typically does not affect drivability but may disable seat-related features.
1. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.
2. Most Common Causes
- Faulty Seat Control Module D (SCM-D) with internal hardware or software corruption
- Damaged, shorted, or high-resistance CAN bus wiring between the seat module and the network
- Corroded, bent, or loose pins in seat electrical connectors due to vibration
- Electromagnetic interference (EMI) degrading signal integrity on the communication bus
- Low battery voltage or charging system fault causing erratic module resets
- Recently replaced SCM-D not properly programmed or configured for the vehicle
3. Symptoms You Will Notice
- Seat adjustments (power, memory, lumbar) may be inoperative or intermittent
- Check Engine Light or Service Seat warning illuminated on the dash
4. Step-by-Step Diagnosis
Scan all modules for related U-codes and check for low battery voltage or charging issues
Inspect the CAN bus wiring and connectors at the seat module for damage, corrosion, or loose pins
Test the SCM-D power and ground circuits; verify module communication with a scan tool
If wiring and power are good, attempt to reprogram or replace the Seat Control Module D
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, it is generally safe to drive as the code does not affect engine or transmission operation. However, seat adjustments may not work, and the warning light will remain on.
How much does it cost to fix?▼
Diagnosis typically costs $100-$150. If the seat module needs replacement, parts and labor range from $300 to $800. Reprogramming alone may be $100-$200.