A fault code doesn’t yet mean the unit or sensor itself is faulty: often it’s the plug and connector leading to it.
Possible causes
- Faulty/unprogrammed key, weak key fob battery or interference from other tags nearby
- Faulty NATS antenna amplifier (ring at the ignition switch/Start button)
- Wiring or connector problems between the antenna and BCM
- Less often — BCM fault
What you can do yourself
- Move other tags/keys and electronics away from the key, try again
- Check/replace the key fob battery, try the spare key
- Better not to drive with an active fault
- Antenna and wiring diagnostics — see an auto electrician
OOleg’s tip: check the connector
Often the cause is simple — there is no contact in the connector (plug). Look at the connector from the back: remove the rubber seal and you will see whether a wire is corroded or has come off completely. Corrosion shows up as green deposits. Ideally, gently pull each wire towards you one at a time: a sound wire stays in place, while a corroded one simply comes off — it needs to be repaired.
Unplug and inspect connectors with the ignition off.
Source: go-parts.com
On Oleg’s website:Car computer diagnostics ↗
The explanation comes from the error code reference in the AvtoElektrik PRO app.