OBD Guide
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C1742

Front Height Control Solenoid Valve Left Circuit Malfunction

C1742 is an OBD-II diagnostic trouble code meaning: Front Height Control Solenoid Valve Left Circuit Malfunction. Common causes: open or short circuit in solenoid circuit, faulty height adjustment solenoid. Estimated repair cost: $56–167.

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

Symptoms

  • Uneven body height
  • Illuminated suspension fault indicator
  • Lack of automatic clearance adjustment

Causes

  • Open or short circuit in solenoid circuit
  • Faulty height adjustment solenoid
  • Problems with the suspension control unit
  • Corroded contacts or damaged wiring harness
  • Poor connection in connectors

How to Fix

  1. Check the integrity of the wiring harness to the solenoid
  2. Check solenoid resistance (compare with specification)
  3. Inspect connectors for corrosion or damage
  4. Check voltage at solenoid connector
  5. If necessary, replace the solenoid or repair the wiring harness.

Related codes

C1741C1743C1744

FAQ

What does the C1742 code mean?

C1742 is an OBD-II diagnostic trouble code that indicates: Front Height Control Solenoid Valve Left Circuit Malfunction

What causes a C1742 error code?

The most common causes of C1742 include: Open or short circuit in solenoid circuit; Faulty height adjustment solenoid; Problems with the suspension control unit; Corroded contacts or damaged wiring harness.

How do I fix a C1742 diagnostic trouble code?

To fix C1742: Check the integrity of the wiring harness to the solenoid. Check solenoid resistance (compare with specification). Inspect connectors for corrosion or damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1742?

Limited driving only, diagnose soon

How much does it cost to fix C1742?

The estimated repair cost for C1742 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat