C0561 on Pontiac
System Disabled / Invalid Serial Data Received
C0561 on Pontiac vehicles indicates system disabled / invalid serial data received. Au7o has documented this code across 1 Pontiac model — most commonly on G6. This code sets when the ABS/electronic brake control module disables itself because it received invalid, missing, or implausible serial data over the vehicle communication bus. Rather than a failed brake part, it usually means the module can't trust the data it's getting from another module (or the bus itself is faulty), so it shuts down ABS and stability/traction control as a precaution. Common subcodes include -71 (invalid serial data received) and -72 (alive counter incorrect, indicating a bus or sending-module problem). The driver typically sees ABS, traction, and 'Service Stability/StabiliTrak' messages while base braking still works.
Common Causes of C0561
- •Communication (CAN/serial data) bus fault or corrupted data
- •Failing module on the bus sending bad data
- •Wiring or connector problems on the data lines
- •Corrosion at module connectors
- •Low battery voltage or charging problems
- •Body control module or other module fault
- •Software/calibration mismatch between modules
C0561 on Pontiac by Model
Pontiac G6(1 issue)
- StabiliTrak / Traction Control / ABS Warning from BCM Connector Corrosion2005-2010
Common G6 fault pattern: simultaneous Service StabiliTrak, Service Traction Control, ABS warning lights, and sometimes Reduced Engine Power message. GM-acknowledged issue (TSB) traced to fretting corrosion on terminals of the Body Control Module connectors (especially the C2 connector) located behind the passenger kick panel. Micro-vibration causes oxidation on the contact surfaces; moisture intrusion from sunroof drains can accelerate it.
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View C0561 across all makes →Frequently Asked Questions
What does C0561 mean on Pontiac?▼
C0561 stands for "System Disabled / Invalid Serial Data Received." This code sets when the ABS/electronic brake control module disables itself because it received invalid, missing, or implausible serial data over the vehicle communication bus. Rather than a failed brake part, it usually means the module can't trust the data it's getting from another module (or the bus itself is faulty), so it shuts down ABS and stability/traction control as a precaution. Common subcodes include -71 (invalid serial data received) and -72 (alive counter incorrect, indicating a bus or sending-module problem). The driver typically sees ABS, traction, and 'Service Stability/StabiliTrak' messages while base braking still works. On Pontiac specifically, this code is documented across 1 model.
What causes C0561 on Pontiac vehicles?▼
Common causes on Pontiac: Communication (CAN/serial data) bus fault or corrupted data, Failing module on the bus sending bad data, Wiring or connector problems on the data lines, Corrosion at module connectors, Low battery voltage or charging problems. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C0561 on a Pontiac?▼
Repair costs vary widely depending on the root cause and specific Pontiac model.
Which Pontiac models have C0561 documented?▼
Au7o has documented C0561 on 1 Pontiac model: G6.