OBD Guide

U0013

Medium Speed CAN Communication Bus (+) Low

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$6–56 (est.)

Symptoms

  • Check Engine light comes on
  • Incorrect operation of vehicle systems
  • Problems with data transfer between modules
  • Intermittent electronic malfunctions
  • Possible problems starting the engine

Causes

  • Broken or damaged CAN bus wires
  • Poor contact in bus connectors
  • Short circuit in the CAN bus circuit
  • Fault in one of the modules connected to the bus
  • Problems with module power supply

How to Fix

  1. Check the integrity of the CAN bus wires
  2. Inspect connectors for oxidation or damage
  3. Check the voltage on the CAN bus
  4. Diagnose modules connected to the bus
  5. Replace damaged components if necessary

Related codes

Error U0013 by Vehicle Brand