C061B: ECM Request - Forced Traction Control Disable

What it means

Engine control module requests forced disable of traction control — typically when the engine cannot deliver requested torque reduction.

At a glance

• Usually lights the ABS or stability-control warning light
• The engine or gearbox may go into limp mode

How it works

Traction control can request engine torque reduction to limit wheelspin, and the engine control module must be able to respond. C061B sets when the engine control module requests that traction control be forced off, commonly because an engine fault prevents the requested torque control or the modules cannot communicate reliably.

Common causes

Most likely first.

1. Engine fault limiting available torque control
2. Fault in communication between engine and traction control modules
3. Damaged wiring or poor connection on the communication network
4. Low or unstable system voltage

Symptoms

• ABS warning light on
• ESC/stability control deactivated
• Possible reduced brake assist
• Speedometer may behave erratically

How to diagnose it

1. Scan the engine, ABS, and stability modules together; record engine codes and freeze-frame data because an engine fault may be the reason for the disable request.
2. Check live data for traction-control status and engine torque-reduction requests to see whether the disable request is active or intermittent.
3. Inspect battery connections and charging-system operation for low or unstable voltage that could disrupt module operation.
4. Inspect the communication network wiring and connectors between the engine and traction-control modules for damage, corrosion, or loose terminals.
5. Diagnose and repair any engine faults that limit torque control, then confirm the modules communicate and traction control is available.

Common fixes

• Repair the engine fault that prevents requested torque reduction.
• Restore a stable battery supply by repairing poor battery connections or a charging-system fault.
• Repair damaged network wiring or loose, corroded module connector terminals.
• Address a module communication fault identified by the manufacturer's diagnostic procedure.

Can I keep driving?

Traction control may be unavailable, so wheelspin can be harder to manage, especially on wet, icy, or loose surfaces. Drive gently and avoid abrupt acceleration until the engine and module faults are diagnosed.