OBD Guide
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C1591

Actuator Neutral Position Calibration Undone

C1591 is an OBD-II diagnostic trouble code meaning: Actuator Neutral Position Calibration Undone. Common causes: no neutral position calibration, actuator malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • Incorrect transmission operation
  • Delayed gear shifting
  • Check engine light comes on

Causes

  • No neutral position calibration
  • Actuator malfunction
  • Problems with position sensors
  • Wiring harness fault

How to Fix

  1. Check for other related errors
  2. Perform neutral position calibration using diagnostic equipment
  3. Check the condition of the actuator and position sensors
  4. Check the integrity of the wiring harness
  5. If necessary, replace faulty components

Related codes

C1590C1592P0700

FAQ

What does the C1591 code mean?

C1591 is an OBD-II diagnostic trouble code that indicates: Actuator Neutral Position Calibration Undone

What causes a C1591 error code?

The most common causes of C1591 include: No neutral position calibration; Actuator malfunction; Problems with position sensors; Wiring harness fault.

How do I fix a C1591 diagnostic trouble code?

To fix C1591: Check for other related errors. Perform neutral position calibration using diagnostic equipment. Check the condition of the actuator and position sensors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1591?

Limited driving only, diagnose soon

How much does it cost to fix C1591?

The estimated repair cost for C1591 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat