OBD Guide
ENFRDEESPT

U2124

Lost Communication With Audio Amplifier

U2124 is an OBD-II diagnostic trouble code meaning: Lost Communication With Audio Amplifier. Common causes: open or short circuit in the communication circuit, audio amplifier malfunction. Estimated repair cost: $17–167.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–167 (est.)

Symptoms

  • No sound from the audio system
  • Speakers don't work
  • Check Engine Light Is On
  • Malfunctions of the multimedia system
  • Error on audio system display

Causes

  • Open or short circuit in the communication circuit
  • Audio amplifier malfunction
  • Problems with wiring connectors
  • Software glitches
  • Amplifier power problems

How to Fix

  1. Check the integrity of the wires between the ECU and the amplifier
  2. Inspect connectors for oxidation or damage
  3. Check fuses related to the audio system
  4. Try to reboot the system (disconnect the battery for 10 minutes)
  5. Diagnose and, if necessary, replace the audio amplifier

Related codes

U2100U2101U2123

FAQ

What does the U2124 code mean?

U2124 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Audio Amplifier

What causes a U2124 error code?

The most common causes of U2124 include: Open or short circuit in the communication circuit; Audio amplifier malfunction; Problems with wiring connectors; Software glitches.

How do I fix a U2124 diagnostic trouble code?

To fix U2124: Check the integrity of the wires between the ECU and the amplifier. Inspect connectors for oxidation or damage. Check fuses related to the audio system. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U2124?

Yes, but get it checked soon

How much does it cost to fix U2124?

The estimated repair cost for U2124 is $17–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat