Skip to content

TAS_a221 — Valve Leak Detected

Full alert identifier: TAS_a221_valveLeakDetected

Alert description

Internal air spring or air reservoir valve leak detected.

Potential impact

Possible decrease in vehicle ride height while vehicle sleeps.

Set condition

Air pressure increase while idle measured over time.

Clear condition

No air pressure increase while idle measured over time.

Signals to check

Open this alert in Service Mode Plus and review the Payload tab. Use the field names below to identify the values shown by your vehicle.

Signal Unit
Gallery Pressure Delta TAS_a221_galleryPressureDelta bar
Time In Idle TAS_a221_timeInIdle ms

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of TAS_a221.

Browse all TAS alert codes