OBD Guide
ENFRDEESPT

U2409

Transmission Range Control Module High Speed CAN Bus Off

U2409 is an OBD-II diagnostic trouble code meaning: Transmission Range Control Module High Speed CAN Bus Off. Common causes: open or short circuit in the can bus, poor contact in trcm module connectors. Estimated repair cost: $56–278.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–278 (est.)

Symptoms

  • Transmission of the gearbox into emergency mode
  • Inability to change gears
  • Check Engine Light Is On
  • Loss of communication with other modules
  • Unstable engine operation

Causes

  • Open or short circuit in the CAN bus
  • Poor contact in TRCM module connectors
  • Range control module malfunction
  • TRCM power supply problems
  • Contact corrosion in wiring harness

How to Fix

  1. Check the integrity of the CAN bus wires
  2. Inspect and clean the TRCM connector contacts
  3. Check TRCM power supply and ground
  4. Scan other modules for related errors
  5. Replace the range control module if necessary

Related codes

U2408U2410U2411

FAQ

What does the U2409 code mean?

U2409 is an OBD-II diagnostic trouble code that indicates: Transmission Range Control Module High Speed CAN Bus Off

What causes a U2409 error code?

The most common causes of U2409 include: Open or short circuit in the CAN bus; Poor contact in TRCM module connectors; Range control module malfunction; TRCM power supply problems.

How do I fix a U2409 diagnostic trouble code?

To fix U2409: Check the integrity of the CAN bus wires. Inspect and clean the TRCM connector contacts. Check TRCM power supply and ground. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U2409?

Do not drive — repair immediately

How much does it cost to fix U2409?

The estimated repair cost for U2409 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat