AutoCodes – Pontiac – B1318 Pontiac

B1318 Pontiac 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 Pontiac 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 886

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

What does this mean?

What are the Possible Causes of the DTC B1318 Pontiac?

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 Pontiac?

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 Pontiac 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 B1318 Pontiac Code

1. What does OBDII code B1318 for a Pontiac Left Sunload Sensor indicate?

The B1318 code specifically pertains to a fault in the Left Sunload Sensor of a Pontiac vehicle.

2. What are common symptoms of a B1318 code in a Pontiac?

Common symptoms include inaccurate readings from the left sunload sensor, issues with the automatic climate control system, and possible malfunctions in the HVAC system.

3. What are possible causes of the B1318 code in a Pontiac?

Possible causes of the B1318 code include a faulty left sunload sensor, damaged wiring or connectors related to the sensor, or issues with the climate control module.

4. How can I diagnose the B1318 code in my Pontiac?

Diagnosing the B1318 code typically involves using a scan tool to retrieve the code, inspecting the left sunload sensor and its wiring for any visible damage, and conducting tests to check the sensor's functionality.

5. How can I repair the B1318 code in my Pontiac?

Repairing the B1318 code may involve replacing the left sunload sensor, repairing or replacing damaged wiring or connectors, and resetting the fault code using a scan tool after the repair is completed.

6. Can I drive my Pontiac with a B1318 code?

It is generally not recommended to drive your Pontiac with a B1318 code, as it can lead to issues with the climate control system and potentially affect the overall functionality of the HVAC system.

7. Is the B1318 code in a Pontiac easy to fix at home?

The complexity of fixing the B1318 code in a Pontiac depends on your experience and access to tools. While some DIY enthusiasts may be able to address the issue, others may prefer to seek professional assistance.

8. Will the B1318 code reset on its own in a Pontiac?

The B1318 code may not reset on its own in a Pontiac. It is recommended to diagnose the root cause of the code, perform necessary repairs, and use a scan tool to reset the code once the issue is resolved.

9. How much does it cost to fix the B1318 code in a Pontiac?

The cost of fixing the B1318 code in a Pontiac can vary depending on the cause of the issue, the required repairs, and whether you choose to address the problem yourself or take your vehicle to a professional mechanic.

10. Can a B1318 code in a Pontiac lead to other problems if left unaddressed?

If left unaddressed, a B1318 code in a Pontiac can potentially lead to further malfunctions in the climate control system, affecting the overall comfort and functionality of the vehicle. It is advisable to address the code promptly to prevent any additional issues.