Limp Mode

Overview

Limp mode is a safety feature that is activated when the ECU detects a fault condition. The ECU may be configured to limit engine power to prevent damage, and may also send messages or activate outputs to signal this condition (e.g. to illuminate a warning light on the dashboard).

This feature is named ’limp mode’ as it allows the vehicle to continue to operate, albeit with reduced performance, to allow the driver to reach (limp to) a place of safety. Sometimes also called ‘Limp Home Mode’.

Limp Mode Channels

Channel Description
channel iconLimp Indicates the state of the ECU’s limp mode.
channel iconLimping Indicates the length of time the ECU has been in limp mode.
channel iconLimp Act T Target Max Indicates the active throttle target limit when in limp mode.

Limp Mode Configuration

Option Description
option iconLimp Trip time Time in seconds that the ECU will wait before entering limp mode after a fault is detected.
option iconLimp wait after start Time in seconds that the ECU will wait before entering limp mode after the engine has started.
option iconLimp Act T Target max Limit active throttle target to this value when in limp mode.
option iconLimp Act T Target rate Rate of change of active throttle target when in limp mode.
option iconLimp WG Duty Limit wastegate duty cycle to this value when in limp mode.
option iconRain Light Limp
option iconLimp to Rain Light		 If ON, activate the Rain Light whe limp mode is active.