OBD Guide
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B1229

Open In The Sunlight Sensor Circuit

B1229 is an OBD-II diagnostic trouble code meaning: Open In The Sunlight Sensor Circuit. Common causes: broken wires in the solar light sensor harness, oxidation or damage to sensor contacts. Estimated repair cost: $33–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–89 (est.)

Symptoms

  • Incorrect operation of automatic climate control
  • Lack of response to changes in sunlight intensity
  • The malfunction indicator on the instrument panel lights up

Causes

  • Broken wires in the solar light sensor harness
  • Oxidation or damage to sensor contacts
  • Malfunction of the solar light sensor itself
  • Blown sensor circuit fuse
  • Problems with the climate control unit

How to Fix

  1. Check the integrity of the solar light sensor wiring harness
  2. Inspect the sensor contacts for oxidation or damage.
  3. Check sensor circuit fuse
  4. Test the sunlight sensor with a multimeter
  5. If necessary, replace the sensor or repair the wiring harness

Related codes

B1230B1231

FAQ

What does the B1229 code mean?

B1229 is an OBD-II diagnostic trouble code that indicates: Open In The Sunlight Sensor Circuit

What causes a B1229 error code?

The most common causes of B1229 include: Broken wires in the solar light sensor harness; Oxidation or damage to sensor contacts; Malfunction of the solar light sensor itself; Blown sensor circuit fuse.

How do I fix a B1229 diagnostic trouble code?

To fix B1229: Check the integrity of the solar light sensor wiring harness. Inspect the sensor contacts for oxidation or damage.. Check sensor circuit fuse. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1229?

Limited driving only, diagnose soon

How much does it cost to fix B1229?

The estimated repair cost for B1229 is $33–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat