B0461low severityBody
Amplifier Circuit Malfunction
on 2004 Mazda MX-5 Miata 1.8L I4 · RWD
What this code means
Malfunction in the audio amplifier circuit. The amplifier is not producing audio output.
Symptoms
- No sound from speakers
- Audio cuts out intermittently
- Distorted audio from all speakers
- Amplifier overheating
Common causes
- Faulty amplifier
- Speaker wiring short causing amp protection mode
- Power supply issue to amplifier
- Water damage to trunk-mounted amplifier
- Overheating from blocked ventilation
Diagnostic steps
- Check amplifier power and ground
- Test speaker wiring for shorts
- Inspect amplifier for water damage
- Check amplifier ventilation
- Test head unit audio output
Repair notes
Replace amplifier or repair speaker wiring. Check for water intrusion if trunk-mounted.
Other Body codes on this vehicle
B0001
Driver Frontal Stage 1 Deployment Control
B0002
Driver Frontal Stage 2 Deployment Control
B0003
Passenger Frontal Stage 1 Deployment Control
B0004
Passenger Frontal Stage 2 Deployment Control
B0005
Driver Knee Airbag Deployment Circuit
B0006
Passenger Knee Airbag Deployment Circuit
B0010
Driver Side Airbag Deployment
B0011
Driver Side Airbag Deployment Circuit Open
B0012
Driver Side Airbag Deployment Circuit Short to Ground
B0013
Driver Side Airbag Deployment Circuit Short to Battery