Resetting Triggered Limp-Home Mechanism

Remove the upper engine cover.
Rectify the fault
Attach female connector for throttle.
Turn the ignition ON.
Clear diagnostic trouble codes.
Turn the ignition OFF.
Carefully slide the end of the spring towards the throttle body using the point of a pen or similar.

Fig 1: Removing Upper Engine Cover
Courtesy of SAAB-SCANIA OF AMERICA, INC.
At the same time, rotate the black tooth disc anti-clockwise with a screwdriver. A click will be heard in its end position.

Fig 2: Rotating Black Tooth Disc Anti-Clockwise With Screwdriver
Courtesy of SAAB-SCANIA OF AMERICA, INC.
Turn the pedal arm with throttle cable clockwise. Make sure that the throttle arm does not follow the movement of the pedal arm.

Fig 3: Fitting Upper Engine Cover
Courtesy of SAAB-SCANIA OF AMERICA, INC.
Fit the upper engine cover.