AutoCodes – Generic – B1308

B1308 Code - Oil Level Switch Circuit Short To Ground

Quick Answer

The Powertrain Control Module (PCM) monitors the Oil Level Switch. Common causes include Faulty Oil Level Switch, Oil Level Switch harness is open or shorted, Oil Level Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B1308 indicates Oil Level Switch Circuit Short To Ground.
Common causes: Common causes include Faulty Oil Level Switch, Oil Level Switch harness is open or shorted, Oil Level Switch circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 6,603

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 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 B1308 Description

The Powertrain Control Module (PCM) monitors the Oil Level Switch. The PCM sets the OBDII code when the Oil Level Switch is not to factory specifications.

OBDII Code B1308 - Oil Level Switch Circuit Short To Ground - AutoCodes.com — B1308 Code - Oil Level Switch Circuit Short To Ground

What does this mean?

What are the Possible Causes of the DTC B1308?

Faulty Oil Level Switch
Oil Level Switch harness is open or shorted
Oil Level Switch circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC B1308?

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 B1308 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 B1308 code?

Need more information on how to fix the B1308 code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 B1308 Code

What does OBDII code B1308 mean?

OBDII code B1308 indicates a problem with the oil level switch circuit, specifically that there is a short to ground, which can prevent the switch from functioning properly.

What are the common symptoms of code B1308?

Common symptoms include warning lights on the dashboard, inaccurate oil level readings, and potential engine performance issues if the oil level is not correctly monitored.

What can cause the B1308 code to trigger?

Possible causes include a defective oil level sensor, damaged wiring or connectors in the oil level circuit, or a short circuit in the wiring harness.

How can I diagnose the issue related to code B1308?

To diagnose code B1308, check the oil level sensor for proper operation, inspect wiring and connectors for damage or corrosion, and use a multimeter to test for shorts in the circuit.

Can I drive my vehicle with code B1308?

While you can technically drive the vehicle, it is not recommended as it may lead to engine damage due to incorrect oil level readings or warnings.

What are some repair tips for fixing code B1308?

Repair tips include replacing a faulty oil level sensor, repairing or replacing damaged wiring, and ensuring all connections are clean and secure.

Is it necessary to clear the code after repairs?

Yes, after completing repairs, you should clear the code using an OBDII scanner and then test drive the vehicle to ensure the code does not return.

How can I prevent the B1308 code from reoccurring?

To prevent the B1308 code from reoccurring, regularly inspect and maintain the vehicle's electrical systems, and address any oil leaks or issues with the oil level sensor promptly.

What should I do if the B1308 code keeps coming back after repairs?

If the B1308 code keeps returning, consider having a professional technician perform a thorough diagnostic to identify any underlying issues that may not have been addressed during initial repairs.