Invalid Data Received From Audio Amplifier Module
The U0443 code means the vehicle's onboard diagnostic system has detected: Invalid Data Received From Audio Amplifier Module. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- easy
- Estimated cost
- $200 - $800 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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Common Symptoms
- No sound from speakers
- Distorted audio output
- One channel of audio not working
- Audio cutting out intermittently
- Volume changing on its own
Probable Causes (Ranked by Likelihood)
- Failed audio amplifier Very High
- Speaker wiring fault High
- CAN bus communication error Moderate
- Water damage to amplifier Low
Step-by-Step Diagnostic Procedure
-
Check amplifier power and ground
-
Test individual speakers
-
Scan audio module for codes
-
Inspect amplifier for water damage
Frequently Asked Questions
Can I drive with U0443?
Yes. Only the audio system is affected.
What causes U0443?
Usually a failed amplifier or speaker wiring fault. Water damage is common in trunk-mounted amps.
How much does U0443 cost to fix?
Typically $200 to $800.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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