OBD Guide
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B2996

Open In The Heater Core Temperature Sensor Circuit

B2996 is an OBD-II diagnostic trouble code meaning: Open In The Heater Core Temperature Sensor Circuit. Common causes: broken wires in the harness, heater temperature sensor malfunction. Estimated repair cost: $22–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$22–56 (est.)

Symptoms

  • Incorrect heater operation
  • Unstable temperature in the cabin
  • Check Engine Light on Dashboard

Causes

  • Broken wires in the harness
  • Heater temperature sensor malfunction
  • Poor contact in the sensor connector
  • Short circuit in the circuit
  • Control unit malfunction

How to Fix

  1. Check the integrity of the wiring harness
  2. Inspect the sensor connector for oxidation or damage.
  3. Check the resistance of the heater temperature sensor
  4. Replace sensor if necessary
  5. Clear error codes and check for reoccurrence

Related codes

B2995B2997

FAQ

What does the B2996 code mean?

B2996 is an OBD-II diagnostic trouble code that indicates: Open In The Heater Core Temperature Sensor Circuit

What causes a B2996 error code?

The most common causes of B2996 include: Broken wires in the harness; Heater temperature sensor malfunction; Poor contact in the sensor connector; Short circuit in the circuit.

How do I fix a B2996 diagnostic trouble code?

To fix B2996: Check the integrity of the wiring harness. Inspect the sensor connector for oxidation or damage.. Check the resistance of the heater temperature sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2996?

Yes, but get it checked soon

How much does it cost to fix B2996?

The estimated repair cost for B2996 is $22–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat