AutoCodes – Generic – B1229

B1229 Code - Open In The Sunlight Sensor Circuit

Quick Answer

The Climate Control Unit monitors the Sunlight Sensor. Common causes include Faulty Sunlight Sensor, Sunlight Sensor harness is open or shorted, Sunlight Sensor circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B1229 indicates Open In The Sunlight Sensor Circuit.
Common causes: Common causes include Faulty Sunlight Sensor, Sunlight Sensor harness is open or shorted, Sunlight Sensor circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 13,521

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 19, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1229 Description

The Climate Control Unit monitors the Sunlight Sensor. The Climate Control Unit sets the OBDII code when the Sunlight Sensor is not to factory specifications.

OBDII Code B1229 - Open In The Sunlight Sensor Circuit - AutoCodes.com — B1229 Code - Open In The Sunlight Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC B1229?

Faulty Sunlight Sensor
Sunlight Sensor harness is open or shorted
Sunlight Sensor circuit poor electrical connection
Faulty Climate Control Unit

How to Fix the DTC B1229?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1229 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1229 code?

Need more information on how to fix the B1229 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1229 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1229 Acura — Open In The Sunlight Sensor Circuit
B1229 Honda — Open In The Sunlight Sensor Circuit

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1229 Code

1. What are the common symptoms of OBDII code B1229 (Open In The Sunlight Sensor Circuit)?

- Common symptoms include inconsistent operation of the automatic headlights, inaccurate ambient light sensing, and the illumination of the check engine light.

2. What are some possible causes of OBDII code B1229?

- The code B1229 may be caused by a malfunctioning sunlight sensor, a damaged wiring harness, loose connections, or a faulty control module.

3. How can I diagnose the Open In The Sunlight Sensor Circuit issue?

- To diagnose the issue, you can use a scan tool to retrieve the OBDII code, visually inspect the sunlight sensor and its wiring, perform continuity tests on the circuit, and check for any loose connections.

4. Can I repair OBDII code B1229 myself?

- Depending on your automotive repair skills, you may be able to repair the code B1229 yourself by replacing the sunlight sensor, repairing or replacing the damaged wiring, or fixing any loose connections.

5. Is it safe to continue driving with OBDII code B1229 present?

- While the vehicle may still be operational with the code B1229, it is recommended to address the issue promptly to ensure proper functioning of the automatic headlights and ambient light sensing.

6. Will resetting the OBDII code B1229 make it go away permanently?

- Simply resetting the code may temporarily clear the check engine light, but if the underlying issue causing the code is not fixed, it is likely to reappear upon the next drive cycle.

7. How much does it typically cost to repair OBDII code B1229 at a mechanic?

- The cost of repairing OBDII code B1229 can vary depending on the specific cause of the issue, but it may range from $100 to $300 at a mechanic, including parts and labor.

8. Can extreme weather conditions affect the sunlight sensor circuit and trigger OBDII code B1229?

- Yes, extreme weather conditions such as prolonged exposure to intense sunlight, heavy rain, or extreme temperatures can potentially damage the sunlight sensor circuit and trigger the code B1229.

9. Are there any preventive measures to avoid OBDII code B1229 in the future?

- To prevent OBDII code B1229, you can regularly inspect the condition of the sunlight sensor, keep the sensor clean from dirt and debris, and address any wiring issues promptly to avoid damage.

10. How long does it typically take to repair OBDII code B1229?

- The repair time for OBDII code B1229 can vary depending on the complexity of the issue, but it may take anywhere from 1 to 3 hours to diagnose and fix the problem.