17978high severityBody
Engine Start Blocked by Immobilizer
on 2019 Audi Q3 2.0L Turbo I4 · AWD
What this code means
The immobilizer system has prevented the engine from starting because the key was not recognized. Equivalent to OBD code P1570.
Symptoms
- Engine cranks but will not start
- Immobilizer warning on dash
- Key not recognized
Common causes
- Faulty or unprogrammed key
- Weak key transponder or battery
- Failed immobilizer antenna ring
- ECU/immobilizer communication fault
Diagnostic steps
- Try a known-good programmed key
- Check immobilizer adaptation status
- Test key transponder signal
- Inspect antenna ring at ignition
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Other Body codes on this vehicle
B0001
Driver Frontal Stage 1 Deployment Control
B0001
Driver Frontal Stage 1 Deployment Control
B0002
Driver Frontal Stage 2 Deployment Control
B0002
Driver Frontal Stage 2 Deployment Control
B0003
Passenger Frontal Stage 1 Deployment Control
B0003
Passenger Frontal Stage 1 Deployment Control
B0004
Passenger Frontal Stage 2 Deployment Control
B0004
Passenger Frontal Stage 2 Deployment Control
B0005
Driver Knee Airbag Deployment Circuit
B0005
Driver Knee Airbag Deployment Circuit