OBD Guide
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U1343

Chassis Control Module LIN Bus 1

U1343 is an OBD-II diagnostic trouble code meaning: Chassis Control Module LIN Bus 1. Common causes: open or short circuit in lin circuit, poor contact in connectors. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Some comfort functions do not work
  • Check Engine light comes on
  • Errors in other related systems
  • Intermittent operation of electrical equipment

Causes

  • Open or short circuit in LIN circuit
  • Poor contact in connectors
  • Chassis control module malfunction
  • Module power problems
  • Contact corrosion

How to Fix

  1. Check the integrity of the LIN bus wiring
  2. Inspect connectors for oxidation or damage
  3. Check power and ground of chassis control module
  4. Scan other modules for related errors
  5. Replace the chassis control module if necessary

Related codes

U1341U1342U1344

FAQ

What does the U1343 code mean?

U1343 is an OBD-II diagnostic trouble code that indicates: Chassis Control Module LIN Bus 1

What causes a U1343 error code?

The most common causes of U1343 include: Open or short circuit in LIN circuit; Poor contact in connectors; Chassis control module malfunction; Module power problems.

How do I fix a U1343 diagnostic trouble code?

To fix U1343: Check the integrity of the LIN bus wiring. Inspect connectors for oxidation or damage. Check power and ground of chassis control module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U1343?

Yes, but get it checked soon

How much does it cost to fix U1343?

The estimated repair cost for U1343 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat