OBD Guide
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C2104

ABS/ESC Valve Supply Voltage Circuit Open

C2104 is an OBD-II diagnostic trouble code meaning: ABS/ESC Valve Supply Voltage Circuit Open. Common causes: broken wire in the harness, faulty abs/esc relay. Estimated repair cost: $56–278.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–278 (est.)

Symptoms

  • ABS/ESC indicator is on
  • Disabling the ABS system
  • Disabling the stabilization system
  • Possible problems with braking on slippery surfaces

Causes

  • Broken wire in the harness
  • Faulty ABS/ESC relay
  • Blown fuse
  • Corrosion of connectors
  • ABS/ESC module internal fault

How to Fix

  1. Check ABS/ESC system fuses and relays
  2. Inspect the wiring harness for damage
  3. Check connections and connectors for corrosion
  4. Ring the valve supply circuit
  5. If necessary, replace the ABS/ESC module

Related codes

C2100C2101C2105

FAQ

What does the C2104 code mean?

C2104 is an OBD-II diagnostic trouble code that indicates: ABS/ESC Valve Supply Voltage Circuit Open

What causes a C2104 error code?

The most common causes of C2104 include: Broken wire in the harness; Faulty ABS/ESC relay; Blown fuse; Corrosion of connectors.

How do I fix a C2104 diagnostic trouble code?

To fix C2104: Check ABS/ESC system fuses and relays. Inspect the wiring harness for damage. Check connections and connectors for corrosion. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C2104?

Limited driving only, diagnose soon

How much does it cost to fix C2104?

The estimated repair cost for C2104 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat