OBD Guide
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C190A

Open In Rear Control Board Temperature Sensor Circuit

C190A is an OBD-II diagnostic trouble code meaning: Open In Rear Control Board Temperature Sensor Circuit. Common causes: broken wire in the harness, oxidation of sensor contacts. 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 climate system
  • Errors on the dashboard
  • Reduced efficiency of temperature dependent systems

Causes

  • Broken wire in the harness
  • Oxidation of sensor contacts
  • Temperature sensor malfunction
  • Damage to the rear control module

How to Fix

  1. Check the integrity of the wiring harness
  2. Clean sensor contacts
  3. Replace temperature sensor if necessary
  4. Check rear control module

Related codes

C190BC190C

FAQ

What does the C190A code mean?

C190A is an OBD-II diagnostic trouble code that indicates: Open In Rear Control Board Temperature Sensor Circuit

What causes a C190A error code?

The most common causes of C190A include: Broken wire in the harness; Oxidation of sensor contacts; Temperature sensor malfunction; Damage to the rear control module.

How do I fix a C190A diagnostic trouble code?

To fix C190A: Check the integrity of the wiring harness. Clean sensor contacts. Replace temperature sensor if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C190A?

Limited driving only, diagnose soon

How much does it cost to fix C190A?

The estimated repair cost for C190A is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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