OBD2 B2384: Audio Mute Circuit Malfunction
The B2384 code indicates that the Audio Control Module (ACM) or Accessory Protocol Interface Module (APIM) has detected a fault in the mute input circuit from the Rear Sensing System (RSS) or Parking Assist Module (PAM). This circuit is used to mute the vehicle's audio when reverse gear is engaged, allowing the driver to hear parking sensor alerts. The fault may be due to an open circuit, short to ground, short to voltage, or excessive resistance in the signal line.
1. Commonly Affected Makes
2. Most Common Causes
- Damaged, corroded, or loose wiring or connectors in the mute circuit between the ACM/APIM and PAM/RSS
- Faulty Parking Assist Module (PAM) or Rear Sensing System (RSS)
- Faulty Audio Control Module (ACM) or APIM
- Short to ground or battery voltage in the mute signal wire
- Incorrect or outdated audio module programming
3. Symptoms You Will Notice
- Audio does not mute when reverse gear is engaged
- Parking sensor chimes are not audible or are distorted
4. Step-by-Step Diagnosis
Scan for additional codes and verify B2384 is present
Inspect the mute circuit wiring and connectors for damage, corrosion, or looseness
Test the mute signal wire for shorts, opens, or excessive resistance using a multimeter
Check for proper operation of the PAM/RSS module by monitoring its mute output
If wiring is intact, test the ACM/APIM for proper mute input response
Reprogram or update the audio module if necessary
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, it is safe to drive. The issue only affects audio muting during reverse, but parking sensors may still function. However, you may not hear sensor alerts clearly.
How much does it cost to fix?▼
Repair costs typically range from $100 to $400, depending on whether it's a wiring repair ($100-$200) or module replacement ($200-$400).