C0074: Requested Driving Torque (Subfault)

What it means

This code identifies a fault associated with requested driving torque information. The specific failure depends on the diagnostic subtype.

At a glance

• Usually lights the ABS or stability-control warning light

How it works

The traction or stability system uses requested driving torque information to know how much torque the driver or control system is asking the engine to produce. This subfault code concerns that requested-torque information or its communication from the engine control module; the diagnostic subtype specifies the reported fault.

Common causes

Most likely first.

1. ECM/TCS communication issue

Symptoms

• Traction or stability-control warning light
• Traction control may be limited or disabled

How to diagnose it

1. Read the traction/stability module's subtype, freeze-frame data, and companion engine-control codes to identify the requested-torque reporting condition.
2. Check for engine-control faults or communication codes that could disrupt the torque request message.
3. Compare requested-torque data available from the engine and traction/stability modules, particularly around the conditions stored in the freeze frame.
4. Inspect module connectors, power and ground connections, and communication wiring for looseness, corrosion, or damage.
5. If no wiring or companion fault explains the issue, use the manufacturer's diagnostic procedure to test torque-message exchange before considering a module fault.

Common fixes

• Repair related engine-control faults that interfere with requested-torque information.
• Secure or repair module connectors and damaged communication wiring.
• Correct faulty module power or ground connections.
• Repair or replace a module only if manufacturer-guided testing confirms a fault in requested-torque reporting or reception.

Can I keep driving?

Traction or stability assistance may be limited if the system cannot interpret requested engine torque. Use gentle acceleration, avoid slippery roads where possible, and have a persistent warning diagnosed.