OBD Guide
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B1A64

Left Solar Sensor Circuit Short

B1A64 is an OBD-II diagnostic trouble code meaning: Left Solar Sensor Circuit Short. Common causes: wiring harness damage, short circuit in the sensor circuit. 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
  • Disabling auto-dimming mirrors
  • Error message on display
  • Inadequate temperature control in the cabin

Causes

  • Wiring harness damage
  • Short circuit in the sensor circuit
  • Sun sensor malfunction
  • Oxidation or contamination of contacts
  • Problems with the climate control unit

How to Fix

  1. Checking the integrity of the wiring harness to the sensor
  2. Sensor Resistance Testing
  3. Cleaning contacts
  4. Replacing the sun sensor if necessary
  5. Checking system operation after repair

Related codes

B1A63B1A65B1A66

FAQ

What does the B1A64 code mean?

B1A64 is an OBD-II diagnostic trouble code that indicates: Left Solar Sensor Circuit Short

What causes a B1A64 error code?

The most common causes of B1A64 include: Wiring harness damage; Short circuit in the sensor circuit; Sun sensor malfunction; Oxidation or contamination of contacts.

How do I fix a B1A64 diagnostic trouble code?

To fix B1A64: Checking the integrity of the wiring harness to the sensor. Sensor Resistance Testing. Cleaning contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1A64?

Yes, but get it checked soon

How much does it cost to fix B1A64?

The estimated repair cost for B1A64 is $33–111. Actual cost depends on your vehicle, location, and labor rates.

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