enbgde
U2012 Ford Basic entry

Communication Bus Error (Non SCP)

Updated 2026-10-02 · Network (manufacturer-specific)

Severity
Medium
Typical repair cost
50 – 700 EUR
System
Network

This is a manufacturer-specific code. Its exact meaning can differ between makes; the definition below follows the most common usage.

What it means

U2012 indicates a fault on the vehicle communication bus itself rather than in one component: Communication Bus (Non SCP). Several modules may log related codes at the same time.

This entry is compiled automatically from the standard definition and typical diagnostic practice for this type of fault. A detailed, reviewed article is in preparation.

Advertisement728 × 90

Symptoms

  • Several warning lights on at the same time
  • Functions controlled by the affected module do not work
  • Scan tool cannot communicate with one module
  • Gauges dropping to zero or dashboard flickering

Common causes

  1. Blown fuse or no power supply to the Communication Bus (Non SCP)
  2. Poor ground for the module
  3. Damaged CAN/data bus wiring or connector
  4. Failed module
  5. Low battery voltage during cranking or after a jump start

How to diagnose

  1. Check which modules respond to a full system scan and which do not
  2. Verify fuses, power and ground at the Communication Bus (Non SCP) connector
  3. Measure CAN bus resistance between the two bus wires (about 60 ohms with the battery disconnected) and inspect the wiring
  4. Check battery voltage and charging system; low voltage causes many communication codes
  5. Replace or reprogram the module only after power, ground and bus wiring are confirmed

Frequently asked questions

Can I keep driving with U2012?

Usually yes for a short time, but expect reduced performance or higher fuel use. Have it diagnosed within a few days.

Will clearing U2012 fix it?

No. Clearing only erases the stored code; it returns as soon as the monitor runs again unless the cause is repaired.

Related codes

U2010U2011U2013U2014

Nearby codes in this group