AutoCodes – Pontiac – B0938 Pontiac

B0938 Pontiac Code - Coolant Level Sensor Circuit Low

Quick Answer

The Powertrain Control Module (PCM) monitors the Coolant Level Sensor. Common causes include Low Coolant Level, Faulty Coolant Level Sensor, Coolant Level Sensor harness is open or shorted. 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: B0938 Pontiac indicates Coolant Level Sensor Circuit Low.
Common causes: Common causes include Low Coolant Level, Faulty Coolant Level Sensor, Coolant Level Sensor harness is open or shorted.
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 936

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 Mar 11, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0938 Pontiac Description

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

OBDII Code B0938 Pontiac - Coolant Level Sensor Circuit Low - AutoCodes.com — B0938 Pontiac Code - Coolant Level Sensor Circuit Low

What does this mean?

What are the Possible Causes of the DTC B0938 Pontiac?

Low Coolant Level
Faulty Coolant Level Sensor
Coolant Level Sensor harness is open or shorted
Coolant Level Sensor circuit poor electrical connection

How to Fix the DTC B0938 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 B0938 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 B0938 Pontiac Code

1. What are the common symptoms of OBDII code B0938 Pontiac (Coolant Level Sensor Circuit Low)?

The common symptoms include the coolant level warning light illuminating on the dashboard, inaccurate coolant level readings, and potential overheating issues.

2. What are the possible causes of OBDII code B0938 Pontiac (Coolant Level Sensor Circuit Low)?

Potential causes include a faulty coolant level sensor, loose or damaged sensor wiring, low coolant levels, or a malfunctioning engine control module (ECM).

3. How can I diagnose the coolant level sensor circuit low issue in my Pontiac?

You can start by visually inspecting the coolant level sensor and its wiring for any visible damage. Using a multimeter, test the sensor for proper functionality and check coolant levels to ensure they are adequate.

4. Can I drive my Pontiac with OBDII code B0938 present?

It is generally not recommended to drive your vehicle with this code active, as it may lead to potential overheating issues and engine damage. It is best to address the issue promptly.

5. How can I repair OBDII code B0938 Pontiac (Coolant Level Sensor Circuit Low)?

Repair options may include replacing the coolant level sensor, repairing or replacing damaged wiring, topping off coolant levels, or resetting the ECM after addressing the underlying cause.

6. Is it safe to ignore the coolant level sensor circuit low warning?

Ignoring the warning may lead to overheating, which can cause serious damage to the engine. It is important to address the issue promptly to prevent potential costly repairs.

7. Can a DIY enthusiast fix OBDII code B0938 Pontiac at home?

Depending on your skill level and access to tools, some DIY enthusiasts may be able to address this issue at home by following repair guides and tutorials specific to the Pontiac model.

8. How much does it cost to repair OBDII code B0938 Pontiac at a professional auto repair shop?

The cost of repair can vary depending on the underlying cause and the labor rates of the auto repair shop. It is recommended to obtain quotes from multiple shops for an accurate estimate.

9. Will resetting the OBDII code B0938 Pontiac resolve the issue temporarily?

Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to return. It is important to diagnose and repair the root cause.

10. Can a faulty coolant level sensor impact the performance of my Pontiac?

While a faulty coolant level sensor may not directly impact performance, it can lead to overheating issues and potential engine damage if left unresolved. It is best to address the issue promptly.