OBD Guide
ENFRDEESPT

U1836

Lost Communication With Amplifier On Low Speed CAN Bus

U1836 is an OBD-II diagnostic trouble code meaning: Lost Communication With Amplifier On Low Speed CAN Bus. Common causes: audio amplifier malfunction, broken or damaged can bus wires. Estimated repair cost: $56–222.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–222 (est.)

Symptoms

  • Audio system doesn't work
  • No sound from speakers
  • The malfunction indicator on the instrument panel is on
  • Problems with other systems connected to the CAN bus

Causes

  • Audio amplifier malfunction
  • Broken or damaged CAN bus wires
  • Poor contact in connectors
  • Amplifier power problems
  • ECU malfunction

How to Fix

  1. Check the power supply and ground of the amplifier
  2. Inspect connectors and wires for damage
  3. Check the integrity of the CAN bus
  4. Test the amplifier on another car
  5. Check the ECU for errors

Related codes

U1835U1837U1838

FAQ

What does the U1836 code mean?

U1836 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Amplifier On Low Speed CAN Bus

What causes a U1836 error code?

The most common causes of U1836 include: Audio amplifier malfunction; Broken or damaged CAN bus wires; Poor contact in connectors; Amplifier power problems.

How do I fix a U1836 diagnostic trouble code?

To fix U1836: Check the power supply and ground of the amplifier. Inspect connectors and wires for damage. Check the integrity of the CAN bus. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U1836?

Yes, but get it checked soon

How much does it cost to fix U1836?

The estimated repair cost for U1836 is $56–222. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat