C0561 on Cadillac
System Disabled / Invalid Serial Data Received
C0561 on Cadillac vehicles indicates system disabled / invalid serial data received. Au7o has documented this code across 2 Cadillac models — most commonly on Escalade, XTS. 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. Typical repair costs on Cadillac range from $150 to $2,500, depending on the specific model and root cause.
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 Cadillac by Model
Cadillac Escalade(1 issue)
- Service StabiliTrak With Reduced Engine Power on GMT900 Escalade2007-2014
GMT900 Escalades commonly throw 'Service StabiliTrak' and 'Service Traction Control' together with a reduced-engine-power event, and owners chase it for months because three unrelated root causes present identically. The most common is the electronic throttle body - carbon buildup on the blade and a worn throttle position sensor track make the two APP/TPS signals disagree, the PCM defaults to limp mode, and StabiliTrak disables itself because it can no longer command torque reduction. The second is the brake pressure sensor or the EBCM internally, which sets a chassis code and disables ESC without any engine symptom. The third is a weak battery or corroded ground causing a low-voltage brownout that trips every chassis module at once. CarComplaints lists 'Stabiltrak Light On' as the #3 problem on the 2007 Escalade at an average of $1,800 and 75,000 miles, and the 2007 model year carries 41 NHTSA engine complaints alongside a large ESC-related brakes group on 2011.
Cadillac XTS(1 issue)
- Rear Air Suspension Sudden Collapse (F38 Air Ride)2013-2019
XTS models equipped with the optional rear air-leveling suspension (RPO F38) suffer sudden, total collapse of the rear air springs/struts, often without warning and sometimes at highway speed. NHTSA/CarComplaints reports describe the rear dropping so low the tires nearly contact the wheel wells, causing the rear end to bounce and loss of vehicle control. Root causes include failed rear air springs (perforation/dry-rot), a worn-out air dryer/desiccant that lets moisture accumulate, and air compressor/air-line failures. A 'Service Leveling System' message and the car sitting low or unlevel are the early warning signs. The 2013 model year alone shows ~24 logged suspension complaints, the highest-volume XTS problem after CUE.
Looking for C0561 on a different make?
View C0561 across all makes →Frequently Asked Questions
What does C0561 mean on Cadillac?▼
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 Cadillac specifically, this code is documented across 2 models.
What causes C0561 on Cadillac vehicles?▼
Common causes on Cadillac: 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 Cadillac?▼
Repair costs on Cadillac range from $150 to $2,500, depending on the specific model and root cause.
Which Cadillac models have C0561 documented?▼
Au7o has documented C0561 on 2 Cadillac models: Escalade, XTS.