OBD-II code · Body
B0425 Audio Amplifier Internal Failure
The audio amplifier reports an internal self-test failure. Sound output may be distorted, missing on some channels, or the amplifier enters a protection mode.
Is it safe to drive with B0425?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyAmplifier internal fault
- PossiblePower supply or ground fault
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–2.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Audio Amplifier, Infotainment Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.