AutoCodes – Saturn – B1318 Saturn

B1318 Saturn 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 Saturn 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 944

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 Saturn 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 Saturn - Left Sunload Sensor - AutoCodes.com — B1318 Saturn Code - Left Sunload Sensor

What does this mean?

What are the Possible Causes of the DTC B1318 Saturn?

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 Saturn?

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 Saturn 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 Saturn code?

Need more information on how to fix the B1318 Saturn 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 Saturn Code

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

- Common symptoms include issues with the automatic climate control system, such as incorrect temperature readings or erratic behavior from the air conditioning system.

2. What typically causes the OBDII code B1318 in a Saturn associated with the Left Sunload Sensor?

- The B1318 code is usually triggered by a malfunction or failure of the left sunload sensor itself, which is responsible for measuring the amount of sunlight entering the vehicle.

3. How can I diagnose the issue related to the Left Sunload Sensor in my Saturn when the B1318 code appears?

- To diagnose the problem, you can start by checking the wiring and connections to the left sunload sensor, ensuring they are secure and free of damage or corrosion.

4. Is it possible to reset the B1318 code in a Saturn without addressing the underlying issue with the Left Sunload Sensor?

- While you can clear the code temporarily, it is recommended to address the underlying problem with the Left Sunload Sensor to prevent the code from reoccurring.

5. Can I repair the Left Sunload Sensor in my Saturn myself to resolve the B1318 code?

- Depending on your skill level and access to tools, you may be able to replace the Left Sunload Sensor yourself. However, if you are uncertain, it is best to consult a professional mechanic.

6. Are there any tips for preventing the OBDII code B1318 related to the Left Sunload Sensor in my Saturn?

- Regularly inspecting and maintaining the sunload sensors in your Saturn can help prevent issues that trigger the B1318 code. Keeping them clean and free of obstructions is essential.

7. Will driving my Saturn with the B1318 code related to the Left Sunload Sensor pose any safety risks?

- While the B1318 code itself may not directly affect the safety of driving your Saturn, unresolved issues with the Left Sunload Sensor could impact the performance of the climate control system.

8. How much can I expect to pay for repairing the Left Sunload Sensor in my Saturn when facing the B1318 code?

- The cost of repairing the Left Sunload Sensor can vary depending on the model of your Saturn and the labor rates in your area. It's recommended to obtain quotes from different mechanics.

9. Can extreme weather conditions affect the performance of the Left Sunload Sensor in a Saturn, leading to the B1318 code?

- Yes, extreme heat or cold can potentially impact the accuracy and functionality of the Left Sunload Sensor, which may contribute to triggering the B1318 code.

10. Will fixing the OBDII code B1318 related to the Left Sunload Sensor affect the overall performance of my Saturn?

- Resolving the B1318 code by addressing the issue with the Left Sunload Sensor can help restore the proper functioning of the automatic climate control system in your Saturn, improving overall comfort and convenience.