OBD Guide
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B2997

Short In The Heater Core Temperature Sensor Circuit

B2997 is an OBD-II diagnostic trouble code meaning: Short In The Heater Core Temperature Sensor Circuit. Common causes: wiring harness damage, malfunction of the heater core temperature sensor. 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 heating system
  • Increased fuel consumption
  • Engine overheating
  • Check Engine light comes on

Causes

  • Wiring harness damage
  • Malfunction of the heater core temperature sensor
  • Short circuit in the electrical circuit
  • Problems with contacts in connectors

How to Fix

  1. Check the integrity of the wiring harness
  2. Check the resistance of the heater core temperature sensor
  3. Inspect connectors and contacts for corrosion or damage
  4. Replace the heater core temperature sensor if necessary
  5. Clean or replace damaged wires

Related codes

P0115P0116P0117

FAQ

What does the B2997 code mean?

B2997 is an OBD-II diagnostic trouble code that indicates: Short In The Heater Core Temperature Sensor Circuit

What causes a B2997 error code?

The most common causes of B2997 include: Wiring harness damage; Malfunction of the heater core temperature sensor; Short circuit in the electrical circuit; Problems with contacts in connectors.

How do I fix a B2997 diagnostic trouble code?

To fix B2997: Check the integrity of the wiring harness. Check the resistance of the heater core temperature sensor. Inspect connectors and contacts for corrosion or damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2997?

Limited driving only, diagnose soon

How much does it cost to fix B2997?

The estimated repair cost for B2997 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat