P061F: Internal Control Module Throttle Actuator Controller Performance

What it means

An internal self-test in the control module reports a fault in its processing of the "throttle actuator control" value. The module computes and cross-checks this value redundantly inside its own processor; when the results disagree, the code sets. It points to a hardware or software fault inside the module itself, not to a defect of the external sensor. Causes are an internal processor or memory fault, corrupted control-module software, or low or disturbed module supply voltage.

At a glance

• Usually lights the check-engine light

How it works

The control module manages the throttle actuator, which positions the throttle in response to driver demand and engine-control commands. P061F sets when the module's internal checks of throttle-actuator control processing disagree; it does not by itself prove the throttle body or an external sensor is defective.

Common causes

Most likely first.

1. Low or unstable control-module power or ground
2. Poor module connector contact or damaged wiring
3. Control-module software or calibration fault
4. Internal control-module hardware fault

Symptoms

• Check engine light on
• Reduced throttle response, possible limp mode
• Hesitation or surging
• Idle too high or too low

How to diagnose it

1. Record freeze-frame data and scan all modules for throttle, voltage, and communication faults before clearing codes.
2. Check battery and charging-system condition for low or unstable voltage that could disrupt throttle control.
3. Inspect the control module's power, ground, connectors, and harness, then visually check the throttle actuator wiring for damage or poor contact.
4. Use scan-tool data to compare commanded and actual throttle position while following the manufacturer's safety procedure; do not force the throttle plate.
5. Check for applicable software updates and follow the manufacturer's tests to distinguish a wiring or actuator fault from an internal module fault.

Common fixes

• Repair poor module power or ground connections.
• Repair damaged throttle-actuator wiring or corroded connector pins.
• Correct a battery or charging-system problem causing unstable voltage.
• Reflash the module if an applicable update is specified.
• Replace the control module only if testing confirms an internal throttle-control processing fault.

Can I keep driving?

Reduced throttle response, surging, or an unstable idle can make the vehicle difficult to control in traffic. Avoid driving if throttle response is unpredictable or the vehicle enters reduced-power mode; arrange diagnosis before further use.