OBD Guide
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B1226

Short In The In-Car Temperature Sensor Circuit

B1226 is an OBD-II diagnostic trouble code meaning: Short In The In-Car Temperature Sensor Circuit. Common causes: wiring harness damage, oxidation or corrosion of contacts. Estimated repair cost: $33–111.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$33–111 (est.)

Symptoms

  • Incorrect operation of climate control
  • Incorrect display of interior temperature
  • Lack of system response to temperature changes

Causes

  • Wiring harness damage
  • Oxidation or corrosion of contacts
  • Faulty interior temperature sensor
  • Short circuit in the circuit

How to Fix

  1. Check the integrity of the wiring harness
  2. Clean sensor contacts and connectors
  3. Check the resistance of the temperature sensor
  4. Replace sensor if necessary
  5. Eliminate short circuit in the circuit

Related codes

B1225B1227

FAQ

What does the B1226 code mean?

B1226 is an OBD-II diagnostic trouble code that indicates: Short In The In-Car Temperature Sensor Circuit

What causes a B1226 error code?

The most common causes of B1226 include: Wiring harness damage; Oxidation or corrosion of contacts; Faulty interior temperature sensor; Short circuit in the circuit.

How do I fix a B1226 diagnostic trouble code?

To fix B1226: Check the integrity of the wiring harness. Clean sensor contacts and connectors. Check the resistance of the temperature sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1226?

Yes, but get it checked soon

How much does it cost to fix B1226?

The estimated repair cost for B1226 is $33–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat