OBD Guide
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C1902

Ride Control Right Rear Shock Actuator Circuit Open

C1902 is an OBD-II diagnostic trouble code meaning: Ride Control Right Rear Shock Actuator Circuit Open. Common causes: broken wire in the shock absorber actuator circuit, oxidation or broken contact in the actuator connector. Estimated repair cost: $33–278.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$33–278 (est.)

Symptoms

  • Adaptive suspension lamp is on
  • The stiffness of the right rear pillar does not change
  • Possible deterioration in ride quality
  • Inability to select suspension modes
  • Code C1902 and/or C1901 in the ECU memory

Causes

  • Broken wire in the shock absorber actuator circuit
  • Oxidation or broken contact in the actuator connector
  • Internal break in actuator winding
  • Cable chafing near suspension elements
  • Malfunction of the adaptive suspension control unit

How to Fix

  1. Read codes and record real-time data for the actuator
  2. Visually inspect the connector and cable of the right rear pillar actuator
  3. Measure the resistance of the actuator circuit with a multimeter (infinity - open)
  4. Check the integrity of the wire from the control unit to the actuator
  5. Repair the wiring break or replace the actuator if there is an internal break
  6. Reset codes and check suspension operation

Related codes

C1901C1911C1903C1912

FAQ

What does the C1902 code mean?

C1902 is an OBD-II diagnostic trouble code that indicates: Ride Control Right Rear Shock Actuator Circuit Open

What causes a C1902 error code?

The most common causes of C1902 include: Broken wire in the shock absorber actuator circuit; Oxidation or broken contact in the actuator connector; Internal break in actuator winding; Cable chafing near suspension elements.

How do I fix a C1902 diagnostic trouble code?

To fix C1902: Read codes and record real-time data for the actuator. Visually inspect the connector and cable of the right rear pillar actuator. Measure the resistance of the actuator circuit with a multimeter (infinity - open). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1902?

Do not drive — repair immediately

How much does it cost to fix C1902?

The estimated repair cost for C1902 is $33–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat