AutoCodes – GMC – B1258 GMC

B1258 GMC Code - Solar Radiation Sensor Circuit Failure

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: B1258 GMC indicates Solar Radiation Sensor Circuit Failure.
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.

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Code Popularity 836

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 29, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1258 GMC Description

Under normal operation, the solar radiation sensor receives a ground through the circuit. A 5-volt reference voltage is supplied to the solar radiation sensor from the Electronic Automatic Temperature Control (EATC) Module through. The EATC Module monitors the Solar Radiation Sensor. The EATC Module sets the OBDII code when the Solar Radiation Sensor is not to factory specifications.

OBDII Code B1258 GMC - Solar Radiation Sensor Circuit Failure - AutoCodes.com — B1258 GMC Code - Solar Radiation Sensor Circuit Failure

What does this mean?

What are the Possible Causes of the DTC B1258 GMC?

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 B1258 GMC?

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 B1258 GMC 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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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 B1258 GMC Code

1. What are the common symptoms of OBDII code B1258 GMC (Solar Radiation Sensor Circuit Failure)?

- Common symptoms include inaccurate readings from the solar radiation sensor, malfunctioning automatic climate control, and potential illumination of the check engine light.

2. What can cause the OBDII code B1258 GMC to trigger?

- The code B1258 GMC is typically triggered by a malfunction in the solar radiation sensor circuit, which can be caused by sensor damage, wiring issues, or a faulty sensor module.

3. How can I diagnose the Solar Radiation Sensor Circuit Failure in my GMC vehicle?

- Diagnosis involves visually inspecting the sensor and its wiring for any visible damage, testing the sensor's functionality using a multimeter, and checking for any loose connections.

4. Can I repair the Solar Radiation Sensor Circuit Failure on my own?

- Depending on your skill level, you may be able to replace the solar radiation sensor or repair wiring issues on your own. However, it's recommended to consult a professional mechanic for accurate diagnosis and repair.

5. Is it safe to continue driving with the OBDII code B1258 GMC active?

- While the code B1258 GMC may not directly affect the drivability of your vehicle, it's important to address the issue promptly to ensure proper functioning of the automatic climate control system.

6. Are there any temporary fixes for the Solar Radiation Sensor Circuit Failure code?

- Temporary fixes may include checking and securing any loose connections, ensuring the sensor is clean and free of debris, and resetting the fault code to see if it reoccurs.

7. How much does it typically cost to repair the Solar Radiation Sensor Circuit Failure in a GMC vehicle?

- The cost of repair can vary depending on the extent of the issue, but it may range from $100 to $300, including parts and labor.

8. Can extreme weather conditions affect the solar radiation sensor and trigger the B1258 code?

- Yes, extreme weather conditions such as prolonged exposure to intense sunlight, heavy rain, or extreme temperatures can potentially damage the solar radiation sensor and lead to the circuit failure.

9. Will resetting the OBDII code B1258 GMC make it go away permanently?

- Resetting the code may temporarily clear the fault, but if the underlying issue with the solar radiation sensor circuit is not resolved, the code is likely to reappear.

10. Is the Solar Radiation Sensor Circuit Failure a common issue in GMC vehicles?

- While not extremely common, instances of the B1258 GMC code being triggered due to solar radiation sensor circuit failure have been reported in certain GMC models.