B1259 Cadillac Code - Solar Radiation Sensor Circuit Open
Quick Answer
Under normal operation, the solar radiation sensor receives a ground through the circuit. Common causes include Faulty Solar Radiation Sensor, Solar Radiation Sensor harness is open or shorted, Solar Radiation 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
- B1259 Cadillac indicates Solar Radiation Sensor Circuit Open.
- Common causes
- Common causes include Faulty Solar Radiation Sensor, Solar Radiation Sensor harness is open or shorted, Solar Radiation 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.
Code B1259 Cadillac Description
What are the Possible Causes of the DTC B1259 Cadillac?
- Faulty Solar Radiation Sensor
- Solar Radiation Sensor harness is open or shorted
- Solar Radiation Sensor circuit poor electrical connection
- Faulty Electronic Automatic Temperature Control (EATC) Module
How to Fix the DTC B1259 Cadillac?
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 B1259 Cadillac 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.
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Frequently Asked Questions about B1259 Cadillac Code
1. What does the OBDII code B1259 mean on a Cadillac?
The code B1259 indicates an open circuit issue in the solar radiation sensor, which measures sunlight intensity for the vehicle's climate control system.
2. What are the common symptoms of code B1259 in a Cadillac?
Symptoms may include improper operation of the automatic climate control system, such as inaccurate temperature regulation or failure to adjust based on sunlight intensity.
3. What causes the B1259 code to appear?
This code is typically caused by a faulty solar radiation sensor, damaged wiring, a disconnected sensor connector, or a malfunction in the climate control module.
4. How can I diagnose the B1259 code on my Cadillac?
Start by inspecting the solar radiation sensor and its wiring for visible damage, loose connections, or corrosion. Use a multimeter to test for continuity in the sensor circuit.
5. Where is the solar radiation sensor located in a Cadillac?
The solar radiation sensor is usually located on the dashboard near the base of the windshield, where it can detect sunlight.
6. Can I drive my Cadillac with the B1259 code?
Yes, you can drive the vehicle, but the automatic climate control system may not function correctly, leading to discomfort in extreme weather conditions.
7. How do I fix the B1259 code on my Cadillac?
Repair options include replacing the solar radiation sensor, repairing or replacing damaged wiring, or resetting the climate control module if no hardware issues are found.
8. How much does it cost to fix a B1259 code in a Cadillac?
The repair cost varies but generally ranges from $50 to $200, depending on whether the sensor, wiring, or other components need replacement.
9. Can a B1259 code clear itself on a Cadillac?
The code may clear itself if the issue is intermittent, but it’s recommended to diagnose and fix the problem to prevent it from recurring.
10. Does the B1259 code affect other vehicle systems?
This code primarily affects the climate control system and does not usually impact other vehicle systems.
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