OBD Guide
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C1808

Air Suspension Compressor Function

C1808 is an OBD-II diagnostic trouble code meaning: Air Suspension Compressor Function. Common causes: air suspension compressor malfunction, air leaks in the system. Estimated repair cost: $167–556.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$167–556 (est.)

Symptoms

  • The car sags on one or more sides
  • Ground clearance adjustment does not work
  • Suspension fault indicator is on
  • I hear unusual noise from the compressor

Causes

  • Air suspension compressor malfunction
  • Air leaks in the system
  • Wiring or relay problems
  • Malfunction of suspension level sensors
  • Clogged compressor air filter

How to Fix

  1. Check the compressor for mechanical damage
  2. Examine the system for air leaks
  3. Check electrical connections and relays
  4. Replace faulty components (compressor, sensors, relays)
  5. Clean or replace the compressor air filter

Related codes

C1710C1715C1720

FAQ

What does the C1808 code mean?

C1808 is an OBD-II diagnostic trouble code that indicates: Air Suspension Compressor Function

What causes a C1808 error code?

The most common causes of C1808 include: Air suspension compressor malfunction; Air leaks in the system; Wiring or relay problems; Malfunction of suspension level sensors.

How do I fix a C1808 diagnostic trouble code?

To fix C1808: Check the compressor for mechanical damage. Examine the system for air leaks. Check electrical connections and relays. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1808?

Limited driving only, diagnose soon

How much does it cost to fix C1808?

The estimated repair cost for C1808 is $167–556. Actual cost depends on your vehicle, location, and labor rates.

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