OBD Guide
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B27C5

A/C Unit Case Temperature Sensor High

B27C5 is an OBD-II diagnostic trouble code meaning: A/C Unit Case Temperature Sensor High. Common causes: air conditioning unit temperature sensor malfunction, open or short circuit in wiring harness. Estimated repair cost: $56–167.

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

Symptoms

  • Incorrect operation of the air conditioner
  • Unstable air temperature in the cabin
  • The climate control system does not respond to changes in settings

Causes

  • Air conditioning unit temperature sensor malfunction
  • Open or short circuit in wiring harness
  • Poor contact in the sensor connector
  • Malfunction of the climate control control unit

How to Fix

  1. Check the air conditioning unit temperature sensor for damage.
  2. Check the wiring harness and connectors for breaks or corrosion.
  3. Replace temperature sensor if necessary
  4. Check and, if necessary, replace the climate control control unit

Related codes

B27C4B27C6

FAQ

What does the B27C5 code mean?

B27C5 is an OBD-II diagnostic trouble code that indicates: A/C Unit Case Temperature Sensor High

What causes a B27C5 error code?

The most common causes of B27C5 include: Air conditioning unit temperature sensor malfunction; Open or short circuit in wiring harness; Poor contact in the sensor connector; Malfunction of the climate control control unit.

How do I fix a B27C5 diagnostic trouble code?

To fix B27C5: Check the air conditioning unit temperature sensor for damage.. Check the wiring harness and connectors for breaks or corrosion.. Replace temperature sensor if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B27C5?

Limited driving only, diagnose soon

How much does it cost to fix B27C5?

The estimated repair cost for B27C5 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat