P1637: Can Link ECM/ABSCM Circuit / Network Malfunction
CriticalPowertrainBraking System
What does P1637 mean?
P1637 is a diagnostic trouble code indicating "Can Link ECM/ABSCM Circuit / Network Malfunction". A component in the braking system has been flagged as malfunctioning by the vehicle's ECU. This requires diagnosis to determine whether the part itself has failed or if there is a related wiring or control issue.
Common causes
- Faulty braking system component
- Wiring or connector issue in the related circuit
- Failed sensor providing incorrect readings
- Software/calibration issue requiring ECU update
- Related component causing secondary fault
What should you do?
This is a critical issue. Stop driving as soon as it is safe to do so and have the vehicle inspected immediately. Continuing to drive could cause further damage or pose a safety risk.
Get a diagnosis for YOUR car
Code P1637 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.