OBD Guide
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C1904

Ride Control Right Rear Shock Actuator Circuit Short To Ground

C1904 is an OBD-II diagnostic trouble code meaning: Ride Control Right Rear Shock Actuator Circuit Short To Ground. Common causes: wiring harness damage, shock absorber solenoid valve malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Rigid suspension on the right rear side
  • Suspension fault indicator is on
  • Reduced riding comfort

Causes

  • Wiring harness damage
  • Shock absorber solenoid valve malfunction
  • Short circuit in control circuit
  • Problems with the suspension control unit

How to Fix

  1. Check the integrity of the wiring harness to the right rear shock absorber
  2. Check the resistance of the shock absorber solenoid valve
  3. Check for a short to ground in the control circuit
  4. If necessary, replace the shock absorber or wiring harness
  5. Reset the error and check the system operation

Related codes

C1905C1906C1907

FAQ

What does the C1904 code mean?

C1904 is an OBD-II diagnostic trouble code that indicates: Ride Control Right Rear Shock Actuator Circuit Short To Ground

What causes a C1904 error code?

The most common causes of C1904 include: Wiring harness damage; Shock absorber solenoid valve malfunction; Short circuit in control circuit; Problems with the suspension control unit.

How do I fix a C1904 diagnostic trouble code?

To fix C1904: Check the integrity of the wiring harness to the right rear shock absorber. Check the resistance of the shock absorber solenoid valve. Check for a short to ground in the control circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1904?

Limited driving only, diagnose soon

How much does it cost to fix C1904?

The estimated repair cost for C1904 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat