OBD Guide

P15C9

Electric A/C Compressor Status Message Counter Incorrect

P15C9 is an OBD-II diagnostic trouble code meaning: Electric A/C Compressor Status Message Counter Incorrect. Common causes: electrical air conditioning compressor malfunction, problems with wiring or connectors. Estimated repair cost: $56–278.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–278 (est.)

Symptoms

  • Air conditioner doesn't work
  • Irregular operation of the climate control system
  • Check Engine light comes on
  • Increased noise from the compressor
  • Reduced cooling efficiency

Causes

  • Electrical air conditioning compressor malfunction
  • Problems with wiring or connectors
  • Malfunctions in the climate control module
  • Low refrigerant level
  • Problems with the engine control unit

How to Fix

  1. Check refrigerant level
  2. Diagnose the condition of the electric compressor
  3. Check the integrity of wiring and connectors
  4. Scan the climate control module for errors
  5. If necessary, replace the compressor or control module

Related codes

FAQ

What does the P15C9 code mean?

P15C9 is an OBD-II diagnostic trouble code that indicates: Electric A/C Compressor Status Message Counter Incorrect

What causes a P15C9 error code?

The most common causes of P15C9 include: Electrical air conditioning compressor malfunction; Problems with wiring or connectors; Malfunctions in the climate control module; Low refrigerant level.

How do I fix a P15C9 diagnostic trouble code?

To fix P15C9: Check refrigerant level. Diagnose the condition of the electric compressor. Check the integrity of wiring and connectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P15C9?

Yes, but get it checked soon

How much does it cost to fix P15C9?

The estimated repair cost for P15C9 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat