P06AF

What it means

P06AF is the generic code for Torque Management System - Forced Engine Shutdown. The powertrain control module has detected a torque management fault serious enough that it has shut the engine down, or is about to, to protect the engine, driveline or occupants. The exact trigger depends on the manufacturer and engine, so the other stored codes and freeze frame data are essential to finding the real cause.

Symptoms

• Engine shuts down while running or stalls without warning
• Engine cuts out shortly after starting
• Engine management light on, possibly with other warning lamps
• Car goes into limp mode or has restricted power before shutting down
• Long cranking or no restart after the shutdown
• Intermittent fault that clears and returns

Possible causes

• Fault in the throttle control system, such as a failing throttle body, pedal sensor or throttle position sensor, causing a torque mismatchlikely
• Other stored faults that feed the torque calculation, for example crank, cam, MAP or MAF sensor faultslikely
• Wiring or connector damage, corrosion or poor earths affecting sensors or actuatorslikely
• Low or unstable supply voltage from a weak battery, charging fault or poor power or earth connections to the control modulepossible
• Fault in the transmission or stability control communication that affects torque requests on the networkpossible
• Internal fault in the powertrain control module or an outdated calibration, depending on the model and manufacturer guidancerare

How to diagnose

1. Read all stored and pending codes and record the freeze frame data, noting engine speed, load, voltage and temperature at the time of the fault
2. Treat any other codes first, especially throttle, pedal, sensor, communication or voltage faults, as they usually point to the root cause
3. Check battery condition and charging voltage, and inspect the battery terminals, main power feeds and earth points
4. Visually inspect wiring and connectors to the throttle body, pedal, crank and cam sensors for chafing, water ingress, corrosion or loose pins
5. Check live data for the throttle and pedal position sensors, comparing the requested and actual values for agreement and smooth movement
6. Inspect for air leaks, a dirty throttle body or restricted intake that could upset the torque calculation, following model-specific procedure
7. Check network communication between the engine, transmission and stability control modules for fault codes or lost messages
8. Check for technical service bulletins or calibration updates for the specific model and engine before considering module replacement

How to fix

• Repair or replace damaged wiring, connectors or earth connections found during inspection
• Clean or replace the throttle body or replace the faulty pedal or throttle sensor, then carry out any required adaptation for the model
• Replace the faulty crank, cam, MAP or MAF sensor that is causing the torque error
• Repair the charging or battery fault to restore stable supply voltage
• Apply a manufacturer calibration update only if an outdated calibration is a documented cause for the vehicle
• Repair or replace the control module only after all other causes are ruled out and the fault is confirmed

Can I keep driving?

Nearby codes

• P06AEGenericControl Module Internal Temperature Sensor B Circuit High
• P06B0GenericSensor Power Supply A Circuit/Open