What Does B2384 Mean?
This code indicates the Body Control Module (BCM) or audio system has detected a fault in the circuit that controls the audio muting function when the reverse aid (parking sensors or backup camera) is activated. The mute input circuit is designed to lower or silence the radio/audio when reversing to ensure audible parking sensor warnings can be heard. The BCM has detected an open circuit, short circuit, or voltage irregularity in this control wire.
Common Causes
35%
Damaged, corroded, or disconnected wiring/connector between the BCM and audio head unit mute input wire
30%
Faulty audio head unit with internal mute circuit failure or damaged mute input pin
20%
Body Control Module internal circuit failure or software glitch affecting mute output control
10%
Short to ground or power in the mute control circuit wiring due to harness damage or pinched wire
5%
Faulty reverse aid control module affecting mute signal generation
Diagnostic Steps
1
Step 1: Perform visual inspection of all wiring and connectors between the BCM and audio head unit, checking specifically for damaged, corroded, or loose connections at both the BCM and head unit mute input wire terminals
2
Step 2: Using a digital multimeter, backprobe the audio mute input wire at the head unit connector while vehicle is in reverse position and verify proper voltage signal (typically 0-5V or 0-12V depending on manufacturer) is present during reverse operation
3
Step 3: Check continuity of the mute control wire between the BCM output pin and the audio head unit mute input pin with ignition off and connectors disconnected, verifying no open circuit or excessive resistance (should be less than 5 ohms)
4
Step 4: Test for short to ground or short to power by measuring resistance between the mute wire and ground, then mute wire and battery positive with all connectors disconnected (should read infinite resistance/open circuit in both cases)
5
Step 5: If wiring is intact, monitor BCM output signal with a multimeter or oscilloscope while shifting into reverse to confirm BCM is generating proper mute command signal
6
Step 6: If BCM signal is present but head unit does not respond, test audio head unit mute function by applying appropriate ground or voltage signal directly to mute input pin to determine if head unit mute circuit is functional
Estimated Repair Cost
$75 - $850
Parts + labor, varies by vehicle and location
This code indicates the Body Control Module (BCM) or audio system has detected a fault in the circuit that controls the audio muting function when the reverse aid (parking sensors or backup camera) is activated. The mute input circuit is designed to lower or silence the radio/audio when reversing to...
The most common cause of B2384 (Audio Reverse Aid Mute Input Ckt Failure) is: Damaged, corroded, or disconnected wiring/connector between the BCM and audio head unit mute input wire
Typical repair costs for B2384 range from $75 to $850, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to continue driving as this only affects audio muting during reverse operation. While not a safety hazard, the radio may remain at full volume when reversing, potentially masking important parking sensor warning tones which could increase risk of backing collisions.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2384 to identify the root cause.
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Quick Info
Category
Body
System
Audio and Reverse Aid Integration System
Difficulty
Type
Generic (SAE)
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