20/04/2026
📱 Volvo “On Call Service Due” – What It Can Actually Mean
If your Volvo has flashed up ‘On Call Service Required’ or ‘On Call Service Due’, it isn’t always about the app subscription. Sometimes it’s simply the On Call backup battery reaching the end of its life.
🔍 Two common reasons this message appears
1️⃣ Subscription / telematics service due
The Volvo On Call system needs its annual update
Remote features (app, lock/unlock, pre‑heat) may pause until it’s renewed
2️⃣ The On Call backup battery is low
This is the small internal battery inside the telematics unit
It powers emergency functions if the main battery is disconnected
Over time, it naturally wears out and needs replacing
When it gets weak, the car throws the “service required” message
🛠️ What we can do at the garage
At Swallows Volvo Specialist, we can:
Read the codes and confirm which version of the message you’ve got
Check the health of the On Call backup battery
Replace the battery if needed
Reset the message once everything’s sorted
Point you in the right direction if it’s subscription‑related instead
No drama, no guesswork — just a quick check to get your Volvo happy again.
If your dash has lit up with the On Call warning, drop us a message and we’ll take a look.