OBD Guide
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C15A0

Air Suspension Reverse Valve 2 Control

C15A0 is an OBD-II diagnostic trouble code meaning: Air Suspension Reverse Valve 2 Control. Common causes: malfunction of reverse solenoid valve no. 2 (winding or armature), open or short circuit in valve control circuit. Estimated repair cost: $44–222.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$44–222 (est.)

Symptoms

  • The air suspension fault light is on
  • Slow or uneven body height adjustment
  • Emergency mode with fixed ground clearance
  • Extraneous clicks or lack of sound when the valve block operates
  • Body misalignment along axes

Causes

  • Malfunction of reverse solenoid valve No. 2 (winding or armature)
  • Open or short circuit in valve control circuit
  • Valve contaminated or corroded
  • Malfunction of the air suspension control unit
  • Moisture entering the valve block of the pneumatic system

How to Fix

  1. Read codes and real-time data with air suspension scanner
  2. Check the supply voltage and control signal at the valve connector
  3. Check valve coil resistance (typical value 10–30 ohms)
  4. Inspect the valve block for moisture, dirt, or corrosion.
  5. Replace reverse valve No. 2 if its malfunction is confirmed
  6. Check the operation of the pneumatic system after replacement and reset the adaptations

Related codes

C152AC1814C1887C15A1

FAQ

What does the C15A0 code mean?

C15A0 is an OBD-II diagnostic trouble code that indicates: Air Suspension Reverse Valve 2 Control

What causes a C15A0 error code?

The most common causes of C15A0 include: Malfunction of reverse solenoid valve No. 2 (winding or armature); Open or short circuit in valve control circuit; Valve contaminated or corroded; Malfunction of the air suspension control unit.

How do I fix a C15A0 diagnostic trouble code?

To fix C15A0: Read codes and real-time data with air suspension scanner. Check the supply voltage and control signal at the valve connector. Check valve coil resistance (typical value 10–30 ohms). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C15A0?

Do not drive — repair immediately

How much does it cost to fix C15A0?

The estimated repair cost for C15A0 is $44–222. Actual cost depends on your vehicle, location, and labor rates.

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