OBD Guide
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C1814

Air Suspension RR Vent Request Exceeded Max Timing

C1814 is an OBD-II diagnostic trouble code meaning: Air Suspension RR Vent Request Exceeded Max Timing. Common causes: right rear strut exhaust valve clogged or stuck, damage or leakage in the air cylinder. Estimated repair cost: $56–333.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–333 (est.)

Symptoms

  • The air suspension light is on
  • The right rear corner of the car does not lower when selecting a mode
  • The car hangs at an elevated body height
  • Long-term operation of the system when trying to change the ground clearance
  • Air suspension emergency mode

Causes

  • Right rear strut exhaust valve clogged or stuck
  • Damage or leakage in the air cylinder
  • Malfunction of the right rear pillar ride height sensor
  • Clogged air lines of the pneumatic system
  • Malfunction of the air suspension control unit

How to Fix

  1. Read air suspension codes with a scanner and check height sensor data
  2. Check the functionality of the right rear wheel level sensor
  3. Check the exhaust valve: apply a control signal manually via a scanner
  4. Inspect the air cylinder for cracks or sagging
  5. Check air lines for kinks or blockages
  6. Replace the faulty valve or cylinder and then calibrate the system

Related codes

C1887C152AC15A0C1813

FAQ

What does the C1814 code mean?

C1814 is an OBD-II diagnostic trouble code that indicates: Air Suspension RR Vent Request Exceeded Max Timing

What causes a C1814 error code?

The most common causes of C1814 include: Right rear strut exhaust valve clogged or stuck; Damage or leakage in the air cylinder; Malfunction of the right rear pillar ride height sensor; Clogged air lines of the pneumatic system.

How do I fix a C1814 diagnostic trouble code?

To fix C1814: Read air suspension codes with a scanner and check height sensor data. Check the functionality of the right rear wheel level sensor. Check the exhaust valve: apply a control signal manually via a scanner. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1814?

Yes, but get it checked soon

How much does it cost to fix C1814?

The estimated repair cost for C1814 is $56–333. Actual cost depends on your vehicle, location, and labor rates.

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