OBD Guide
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P15AA

Motor Rotor Position Not Learned

P15AA is an OBD-II diagnostic trouble code meaning: Motor Rotor Position Not Learned. Common causes: rotor position sensor malfunction, problems with wiring to the position sensor. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Difficulty starting the engine
  • Unstable engine operation
  • Power Loss
  • Increased fuel consumption
  • Check Engine Light Illuminates

Causes

  • Rotor position sensor malfunction
  • Problems with wiring to the position sensor
  • Engine ECU malfunction
  • Mechanical problems in the VVT system
  • Failures in ECU software

How to Fix

  1. Check the rotor position sensor and its circuit
  2. Inspect the wiring harness for damage
  3. Check VVT system operation (if applicable)
  4. Carry out the rotor position learning procedure
  5. Update ECU firmware if necessary

Related codes

P15ABP15A9P0010

FAQ

What does the P15AA code mean?

P15AA is an OBD-II diagnostic trouble code that indicates: Motor Rotor Position Not Learned

What causes a P15AA error code?

The most common causes of P15AA include: Rotor position sensor malfunction; Problems with wiring to the position sensor; Engine ECU malfunction; Mechanical problems in the VVT system.

How do I fix a P15AA diagnostic trouble code?

To fix P15AA: Check the rotor position sensor and its circuit. Inspect the wiring harness for damage. Check VVT system operation (if applicable). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P15AA?

Limited driving only, diagnose soon

How much does it cost to fix P15AA?

The estimated repair cost for P15AA is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat