C10ACSteering gear: mechanical malfunction / end stops not learned

• Volkswagen group code · Power steering
• Lights a warning lamp

How the car detects it

The power steering unit reports a problem with the steering rack, or (failure type F0) that the steering end stops were not learned after a calibration. On 2018-2020 Golf, Jetta and Tiguan Volkswagen says to update the steering unit's software before replacing anything. When the power steering limits or stops its assistance, the steering becomes heavy but still works mechanically.

What you may notice

• Steering warning light
• Heavy steering possible

Likely causes

• PossibleSteering unit software (update available)
• PossibleEnd stops not learned after a steering-angle calibration
• RareSteering rack

Sources

• static.nhtsa.gov › MC-10169517-0001.pdf · official document
• static.nhtsa.gov › MC-10198162-0001.pdf · official document
• wiki.ross-tech.com › C10AC

Backed by an official manufacturer document.

From Obdaryn's Volkswagen group pack, exactly as the app shows it, with the public sources above. Guidance only; confirm with a workshop.