What does code P1573 mean?

Q: What does code P1573 mean?

PCM EBTCM Serial Data Circuit. P1573 on GM vehicles indicates that the Powertrain Control Module (PCM) has lost or corrupted the serial data communication link with the Electronic Brake and Traction Control Module (EBTCM), often referred to as the ABS controller. The PCM monitors a dedicated serial data circuit between the two modules and sets this code when the expected messages are missing, intermittent, or invalid, which can disable traction control and affect brake performance.

DTC codes / GM codes / P1573

P1573 · GMPCM EBTCM Serial Data Circuit

P1573 on GM vehicles indicates that the Powertrain Control Module (PCM) has lost or corrupted the serial data communication link with the Electronic Brake and Traction Control Module (EBTCM), often referred to as the ABS controller. The PCM monitors a dedicated serial data circuit between the two modules and sets this code when the expected messages are missing, intermittent, or invalid, which can disable traction control and affect brake performance.

SystemPowertrain

Code typeGM specific

SeverityMedium

Fix difficultyProfessional

AreaVehicle speed, idle control and auxiliary inputs

Guidance is general and written for GM vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.