Toggle Side Panel

Shopping Cart

No products in the basket.

Shopping Cart

No products in the basket.

Close search
Home / DTC / B2822 — Sound Path State Information Error

B2822 — Sound Path State Information Error

Detailed page for trouble code B2822.

34,332codes
59brands
11,841generic
22,491specific
All codes P-codes (Powertrain) B-codes (Body) C-codes (Chassis) U-codes (Network/User) Tesla Alerts
Reset
Code

B2822

HYUNDAI B — Body

Sound Path State Information Error

Brand: HYUNDAI
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Intermittent or failed CAN/LIN communication between audio-related modules
  • Faulty infotainment/head unit, amplifier, or body control module (BCM)
  • Damaged, corroded, or loose wiring or connectors in audio or data bus circuits
  • Software/firmware mismatch or module configuration error
  • Low battery voltage or poor ground affecting module operation
  • Aftermarket audio equipment or modifications interfering with signals

Symptoms

  • Audio system warnings or mute/stuck mute behavior
  • No sound or intermittent audio output from speakers
  • One or more infotainment features unavailable or inconsistent
  • DTC stored with or without related communication U-codes
  • Possible message on dash/infotainment about system fault

What to check

  • Read all stored DTCs (including U-codes) and freeze frame with a scan tool
  • Check battery voltage and charging system; ensure stable supply (12V nominal)
  • Visually inspect connectors and wiring at head unit, amplifier, BCM for damage/corrosion
  • Verify grounds for audio/BCM/head unit are clean and tight
  • Check for recent modifications or aftermarket audio components
  • Attempt to reproduce fault (key cycles, audio on/off, vehicle start)

Signal parameters

  • CAN/LIN message: Sound Path State — presence/periodicity of message on bus (should be consistent when system powered)
  • Signal value: expected state codes (e.g., standby, playback, mute) — verify values change appropriately when audio is controlled
  • Bus voltage: CAN high/low idle voltages ~2.5 V (measure for short/open)
  • Module power supply: +12V presence and stable ground at head unit/amplifier
  • Related messages: infotainment module status, amplifier mute command, BCM audio gateway messages

Diagnostic algorithm

  1. Use a reliable OEM-level scan tool and read B2822 and any related codes (U-codes). Note freeze frame and occurrence conditions.
  2. Clear the code and attempt to reproduce. If code returns, proceed.
  3. Inspect physical connectors and wiring at the head unit, amplifier, and any audio gateway modules. Repair any damaged wiring or corroded pins.
  4. Verify power and ground at each audio module (head unit, amplifier, BCM). Repair poor connections.
  5. Monitor CAN/LIN traffic while operating the audio controls. Confirm the Sound Path State message is present and shows expected state changes. If message missing or invalid, isolate the source module.
  6. If bus messages are failing, check for short to battery/ground on communication lines and perform continuity/resistance checks between modules.
  7. If wiring and bus checks are good, try swapping or bench-testing the suspected module (head unit or amplifier) if a known-good unit is available.
  8. Check for and install any manufacturer software/firmware updates for infotainment or related modules. Re-flash/reprogram modules if required following OEM procedures.
  9. After repairs or module replacement, clear codes and verify system operation over multiple ignition cycles.
  10. If fault persists, consult manufacturer technical service bulletins or dealer network for module-level diagnostics or recalls.

Likely causes

  • Corroded/loose connector at infotainment head unit or amplifier
  • Faulty audio amplifier or head unit failing to send/receive sound-path state
  • CAN/LIN wiring short or open between modules
  • Module software needing reflash or reconfiguration after replacement
  • Intermittent power/ground to one of the audio modules

Fault status

⚠️ Status
Sound Path State Information Error — module reports invalid or missing sound path/state data on vehicle data bus. Check communication, wiring, and audio modules.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

Similar codes

B2820 B2821 B2823 B2799 U0100 U0073
371

Browse 371 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

HYUNDAI

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

Report

Harassment or bullying behavior
Contains mature or sensitive content
Contains misleading or false information
Contains abusive or derogatory content
Contains spam, fake content or potential malware

Block Member?

Please confirm you want to block this member.

You will no longer be able to:

  • See blocked member's posts
  • Mention this member in posts
  • Invite this member to groups
  • Message this member
  • Add this member as a connection

Please note: This action will also remove this member from your connections and send a report to the site admin. Please allow a few minutes for this process to complete.

Report

You have already reported this .