VCFRONT_a531 — Low Power Index Flagged User Facing
Full alert identifier: VCFRONT_a531_lowPowerIndexFlaggedUserFacing
Message shown in the car
Cabin climate control system requires service Cabin heating / cooling limited or unavailable
Alert description
The compressor power index is lower than expected, which typically indicates a condition affecting the compressor. This can also indicate a condition affecting the discharge or suction pressure sensors. The compressor power index measures the ratio of estimated nominal compressor power consumption against electrical power the compressor actually consumes. A low index value indicates the compressor is drawing / consuming significantly more power than a nominal compressor would be expected to consume.
Potential impact
Thermal system may show reduced effectiveness. Cabin climate control performance may be limited, with cabin heating / cooling not performing at expected levels.
Set condition
The compressor power index, which compares expected compressor power consumption against actual consumption, drops below expected levels.
Clear condition
Clears automatically after the first 30 seconds of each drive cycle, while the condition persists and alert continues to set.
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 |
|---|---|
Power Index Filtered
VCFRONT_
|
— |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCFRONT_a531.