OBD Guide
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C15AA

Lock Mechanism Release Incomplete

C15AA is an OBD-II diagnostic trouble code meaning: Lock Mechanism Release Incomplete. Common causes: mechanical wear or damage to parts, malfunction of position sensors. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • Difficulty shifting gears
  • Unusual sounds when the mechanism is operating
  • Warning messages on the dashboard

Causes

  • Mechanical wear or damage to parts
  • Malfunction of position sensors
  • Wiring problems
  • Software errors in the control system

How to Fix

  1. Conduct system diagnostics to accurately determine the cause
  2. Check mechanical components for wear or damage
  3. Check sensors and wiring
  4. Update control system software
  5. Replace faulty components

Related codes

C15ABC15AC

FAQ

What does the C15AA code mean?

C15AA is an OBD-II diagnostic trouble code that indicates: Lock Mechanism Release Incomplete

What causes a C15AA error code?

The most common causes of C15AA include: Mechanical wear or damage to parts; Malfunction of position sensors; Wiring problems; Software errors in the control system.

How do I fix a C15AA diagnostic trouble code?

To fix C15AA: Conduct system diagnostics to accurately determine the cause. Check mechanical components for wear or damage. Check sensors and wiring. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C15AA?

Do not drive — repair immediately

How much does it cost to fix C15AA?

The estimated repair cost for C15AA is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat