AutoCodes – GMC – P0526 2018 GMC Sierra

P0526 2018 GMC Sierra Code - Cooling Fan Speed Sensor Circuit

Quick Answer

The Engine Control Module (ECM) uses the cooling fan speed signal in order to determine the actual fan speed in relation to the desired fan speed. Common causes include Faulty Cooling Fan Clutch Assembly, Cooling Fan Clutch Assembly harness is open or shorted, Cooling Fan Clutch Assembly 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: P0526 2018 GMC Sierra indicates Cooling Fan Speed Sensor Circuit.
Common causes: Common causes include Faulty Cooling Fan Clutch Assembly, Cooling Fan Clutch Assembly harness is open or shorted, Cooling Fan Clutch Assembly 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 258

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 Jul 02, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0526 2018 GMC Sierra Description

The Engine Control Module (ECM) uses the cooling fan speed signal in order to determine the actual fan speed in relation to the desired fan speed. The ECM uses the cooling fan speed signal in order to reduce the cooling fan noise and maintain the powertrain cooling requirements. The ECM supplies a 5-volt reference and low reference circuit to the clutch hall effect sensor in the cooling fan clutch. The hall effect sensor returns a signal pulse through the signal circuit in response to the reluctor track, which is located inside the fan clutch. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the cooling fan speed signal is greater or less than a predetermined threshold.

OBDII Code P0526 2018 GMC Sierra - Cooling Fan Speed Sensor Circuit - AutoCodes.com — P0526 2018 GMC Sierra Code - Cooling Fan Speed Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC P0526 2018 GMC Sierra?

Faulty Cooling Fan Clutch Assembly
Cooling Fan Clutch Assembly harness is open or shorted
Cooling Fan Clutch Assembly circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0526 2018 GMC Sierra?

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 P0526 2018 GMC Sierra 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 P0526 2018 GMC Sierra code?

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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 P0526 2018 GMC Sierra Code

1. What does OBDII code P0526 for a 2018 GMC Sierra indicate?

The OBDII code P0526 specifically refers to a fault in the Cooling Fan Speed Sensor Circuit in your GMC Sierra.

2. What are the common symptoms of a P0526 code in a 2018 GMC Sierra?

Common symptoms of a P0526 code may include the cooling fan running at a high speed constantly, overheating of the engine, or the cooling fan not running at all.

3. What are the possible causes of a P0526 code in a 2018 GMC Sierra?

Potential causes of a P0526 code include a faulty cooling fan speed sensor, damaged wiring or connectors in the cooling fan circuit, or a malfunctioning cooling fan control module.

4. How can I diagnose a P0526 code in my 2018 GMC Sierra?

To diagnose a P0526 code, you can use an OBDII scanner to read the code and further investigate the cooling fan speed sensor, wiring, connectors, and cooling fan control module for any signs of damage or malfunction.

5. Can I continue driving my 2018 GMC Sierra with a P0526 code?

It is not recommended to continue driving your GMC Sierra with a P0526 code, as it can lead to potential engine overheating and other serious issues. It's best to address the problem promptly.

6. How can I repair a P0526 code in my 2018 GMC Sierra?

Repairing a P0526 code may involve replacing the cooling fan speed sensor, repairing any damaged wiring or connectors, or replacing the cooling fan control module as needed.

7. Will resetting the OBDII code P0526 in my 2018 GMC Sierra make it go away?

Simply resetting the code may temporarily clear the check engine light, but if the underlying issue causing the P0526 code is not addressed, the code is likely to reappear.

8. Are there any DIY tips for fixing a P0526 code in a 2018 GMC Sierra?

While some basic troubleshooting steps can be done at home, diagnosing and repairing a P0526 code often requires specialized tools and knowledge. It may be best to consult a professional mechanic.

9. How much does it typically cost to repair a P0526 code in a 2018 GMC Sierra?

The cost of repairing a P0526 code can vary depending on the specific cause of the issue and the labor rates in your area. It's advisable to get a few quotes from different mechanics for an accurate estimate.

10. Can a P0526 code in a 2018 GMC Sierra cause any long-term damage if left unresolved?

If left unresolved, a P0526 code can lead to engine overheating, potential damage to engine components, and other related issues. It's crucial to address the code promptly to prevent further damage.