P1628 Mazda Code - ECM to ABS/TCS Communication Signal Error

P1628 indicates an ECM to ABS/TCS Communication Signal Error, meaning there is a communication issue between the Engine Control Module (ECM) and the Anti-lock Braking System (ABS) or Traction Control System (TCS).

Symptoms may include the ABS or TCS warning light illuminated, poor traction control performance, a loss of communication between modules, or the engine running in a limited mode.

Common causes include damaged or corroded wiring, a faulty ABS/TCS module, a malfunctioning ECM, or poor electrical connections between the ECM and ABS/TCS modules.

Yes, a malfunctioning ECM can trigger the P1628 code if it fails to communicate properly with the ABS/TCS module.

Start by checking the wiring and connectors between the ECM and ABS/TCS module for damage or corrosion. Use a scan tool to verify communication between the modules and test the modules themselves if needed.

Driving may be possible, but it is not recommended, as the ABS or TCS system may not function properly, potentially compromising your vehicle’s safety.

Repair costs can vary depending on the root cause, ranging from $50 for fixing a wiring issue to over $1,000 if a module replacement is needed.

Clearing the code may temporarily remove the warning, but unless the underlying issue is resolved, the code will likely return.

Yes, a weak or failing battery can lead to communication issues between the ECM and ABS/TCS module, potentially triggering the P1628 code.

While some issues like inspecting wiring can be handled by experienced DIYers, diagnosing and repairing faulty modules often requires professional tools and expertise.