OBD Guide
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U1002

Lost Communication with Gateway Module

U1002 is an OBD-II diagnostic trouble code meaning: Lost Communication with Gateway Module. Common causes: gateway module malfunction, can bus break or damage. Estimated repair cost: $17–167.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–167 (est.)

Symptoms

  • Certain vehicle systems do not work
  • Check engine light is on
  • Malfunctions of electronic modules
  • Lack of communication with diagnostic equipment via OBD-II connector

Causes

  • Gateway module malfunction
  • CAN bus break or damage
  • Problems with module power supply
  • Short circuit in the network
  • Poor contact in connectors

How to Fix

  1. Check battery and generator voltage
  2. Inspect the connectors and wiring of the gateway module
  3. Check the integrity of the CAN bus
  4. Scan all modules for other error codes
  5. If necessary, replace the gateway module

Related codes

U1000U1001U1003

FAQ

What does the U1002 code mean?

U1002 is an OBD-II diagnostic trouble code that indicates: Lost Communication with Gateway Module

What causes a U1002 error code?

The most common causes of U1002 include: Gateway module malfunction; CAN bus break or damage; Problems with module power supply; Short circuit in the network.

How do I fix a U1002 diagnostic trouble code?

To fix U1002: Check battery and generator voltage. Inspect the connectors and wiring of the gateway module. Check the integrity of the CAN bus. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U1002?

Limited driving only, diagnose soon

How much does it cost to fix U1002?

The estimated repair cost for U1002 is $17–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat