AutoCodes – Chevrolet – B1318 Chevrolet

B1318 Chevrolet Code - Left Sunload Sensor

Quick Answer

The Instrument Panel Module (IPM) monitors ambient light with the left and right sunload sensors. Common causes include Faulty Left Sunload Sensor, Left Sunload Sensor harness is open or shorted, Left 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: B1318 Chevrolet indicates Left Sunload Sensor.
Common causes: Common causes include Faulty Left Sunload Sensor, Left Sunload Sensor harness is open or shorted, Left 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.

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Code Popularity 1,274

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 B1318 Chevrolet Description

The Instrument Panel Module (IPM) monitors ambient light with the left and right sunload sensors. The sunload sensors are an infrared light sensitive photodiode. The IPM supplies 5 volts to the sunload sensors signal circuit and provides a low reference circuit. As the light shining upon the sensor gets brighter, the sensor conductance increases. The sensor signal decreases as the conductance increases. The IPM uses this information to compensate for the effect of the sun on the inside air temperature of the vehicle. The IPM converts the voltage values to count values where one volt is approximately equal to 51 counts.

OBDII Code B1318 Chevrolet - Left Sunload Sensor - AutoCodes.com — B1318 Chevrolet Code - Left Sunload Sensor

What does this mean?

What are the Possible Causes of the DTC B1318 Chevrolet?

Faulty Left Sunload Sensor
Left Sunload Sensor harness is open or shorted
Left Sunload Sensor circuit poor electrical connection
Faulty Instrument Panel Module (IPM)

How to Fix the DTC B1318 Chevrolet?

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 B1318 Chevrolet 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 B1318 Chevrolet code?

Need more information on how to fix the B1318 Chevrolet code? Get Access to Factory Service Manuals

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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 B1318 Chevrolet Code

1. What are common symptoms of OBDII code B1318 in a Chevrolet related to the Left Sunload Sensor?

- Common symptoms include erratic climate control operation, inaccurate temperature readings, and the air conditioning system not functioning properly.

2. What does the Left Sunload Sensor do in a Chevrolet vehicle?

- The Left Sunload Sensor measures the amount of sunlight entering the vehicle to help regulate the interior temperature and control the air conditioning system.

3. What are some possible causes of OBDII code B1318 related to the Left Sunload Sensor in a Chevrolet?

- Possible causes may include a faulty sunload sensor, wiring issues, a damaged sensor connector, or a malfunction in the climate control module.

4. How can I diagnose the issue with the Left Sunload Sensor triggering OBDII code B1318 in my Chevrolet?

- Diagnose the issue by checking the sensor wiring for any damage, testing the sensor for proper operation, and using a diagnostic tool to retrieve and interpret the trouble code.

5. Is it safe to continue driving my Chevrolet with OBDII code B1318 related to the Left Sunload Sensor?

- It is generally safe to drive the vehicle with this code, but you may experience issues with the air conditioning system or inaccurate temperature control until the problem is fixed.

6. Can I repair the OBDII code B1318 related to the Left Sunload Sensor in my Chevrolet myself?

- Depending on your skill level and access to tools, you may be able to repair the issue yourself by replacing the sunload sensor, repairing any wiring issues, or addressing a faulty connector.

7. How much does it typically cost to repair OBDII code B1318 related to the Left Sunload Sensor in a Chevrolet?

- The cost of repair can vary depending on the specific issue, but it may range from $100 to $300 for parts and labor if done at a dealership or repair shop.

8. Will resetting the OBDII code B1318 related to the Left Sunload Sensor make the issue go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not fixed, the code is likely to reappear once the system detects the problem again.

9. Can extreme weather conditions affect the performance of the Left Sunload Sensor in triggering OBDII code B1318 in a Chevrolet?

- Yes, extreme heat or direct sunlight can sometimes cause the sensor to malfunction, leading to the triggering of the B1318 trouble code.

10. How important is it to address OBDII code B1318 related to the Left Sunload Sensor in a Chevrolet promptly?

- It is important to address this code promptly to ensure proper functioning of the climate control system and maintain comfort while driving. Delaying repairs could lead to further issues with the air conditioning system.