B1259 Mercury Code - Solar Radiation Sensor Circuit Open
Quick Answer
Sunload Sensor (Solar Radiation Sensor) contains a photovoltaic (sunlight sensitive) diode, which measures sunlight entering vehicle and inputs signal to the Remote Climate Control (RCC) module. Common causes include Faulty Sunload Sensor (Solar Radiation Sensor), Sunload Sensor harness is open or shorted, Sunload 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 Mercury indicates Solar Radiation Sensor Circuit Open.
- Common causes
- Common causes include Faulty Sunload Sensor (Solar Radiation Sensor), Sunload Sensor harness is open or shorted, Sunload 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 Mercury Description
What are the Possible Causes of the DTC B1259 Mercury?
- Faulty Sunload Sensor (Solar Radiation Sensor)
- Sunload Sensor harness is open or shorted
- Sunload Sensor circuit poor electrical connection
How to Fix the DTC B1259 Mercury?
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 Mercury 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 B1259 Mercury code?
Need more information on how to fix the B1259 Mercury code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1259 Mercury code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B1259 Mercury Code
1. What are the common symptoms of OBDII code B1259 Mercury (Solar Radiation Sensor Circuit Open)?
The common symptoms include the solar radiation sensor not functioning properly, inaccurate readings from the sensor, and the vehicle's climate control system not working as expected.
2. What can cause the OBDII code B1259 Mercury to trigger?
This code is typically triggered by a malfunction in the solar radiation sensor circuit, such as a break in the wiring, a loose connection, or a faulty sensor.
3. How can I diagnose the Solar Radiation Sensor Circuit Open issue?
To diagnose the issue, you can visually inspect the wiring and connections of the solar radiation sensor, test the sensor for proper operation, and use a multimeter to check for continuity in the circuit.
4. Can I repair the Solar Radiation Sensor Circuit Open issue myself?
If you have experience with automotive electrical systems, you may be able to repair this issue yourself by fixing any wiring or connection problems, replacing the sensor if necessary, and clearing the OBDII code.
5. Will the OBDII code B1259 Mercury affect the vehicle's performance?
While this code is related to the climate control system, it should not significantly impact the overall performance of the vehicle. However, it may affect the accuracy of the climate control system.
6. How urgent is it to address the Solar Radiation Sensor Circuit Open problem?
This issue is not typically considered urgent, but it is recommended to address it in a timely manner to ensure the proper functioning of the climate control system, especially if you rely on it for comfort while driving.
7. Can extreme weather conditions affect the solar radiation sensor and trigger this code?
Yes, extreme weather conditions such as extreme heat or cold can potentially affect the solar radiation sensor and lead to the triggering of the B1259 OBDII code.
8. Is the solar radiation sensor circuit the same as the ambient light sensor in the vehicle?
While both sensors are related to measuring light levels, the solar radiation sensor is specifically designed to measure the intensity of the sun's radiation, whereas the ambient light sensor is more focused on the overall ambient light in the vehicle's surroundings.
9. How do I reset the OBDII code B1259 Mercury after fixing the Solar Radiation Sensor Circuit Open issue?
After fixing the issue, you can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to clear the code from the system.
10. Can a faulty solar radiation sensor impact the accuracy of the vehicle's automatic headlights?
Yes, a faulty solar radiation sensor can potentially impact the accuracy of the vehicle's automatic headlights, as they rely on sensor data to adjust the headlight intensity based on external lighting conditions.
Discuss the causes and fixes for B1259 Mercury OBDII Code
Code B1259 Mercury comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
