AutoCodes – GMC – P1482 GMC

P1482 GMC Code - Cooling Fan Circuit Condition

Quick Answer

The engine cooling fan is a variable speed fan. Common causes include Faulty Fan Clutch Assembly, Fan Clutch Assembly harness is open or shorted, 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: P1482 GMC indicates Cooling Fan Circuit Condition.
Common causes: Common causes include Faulty Fan Clutch Assembly, Fan Clutch Assembly harness is open or shorted, 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 5,727

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 Aug 24, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1482 GMC Description

The engine cooling fan is a variable speed fan. The Engine Control Module (ECM) controls the fan speed by sending a pulse width modulated signal to the cooling fan speed control module. The cooling fan control module varies the voltage drop across the engine cooling fan motor in relation to the pulse width modulated signal. The cooling fan speed is affected by many different conditions and can be adjusted from 10-90 percent duty cycle. Ninety percent is considered high fan speed. When multiple cooling speed requests are received, the ECM uses the highest cooling fan speed of all the requests. During normal fan ON operation, the control circuit voltage will be low and near battery voltage when the fan is OFF.

OBDII Code P1482 GMC - Cooling Fan Circuit Condition - AutoCodes.com — P1482 GMC Code - Cooling Fan Circuit Condition

What does this mean?

What are the Possible Causes of the DTC P1482 GMC?

Faulty Fan Clutch Assembly
Fan Clutch Assembly harness is open or shorted
Fan Clutch Assembly circuit poor electrical connection

How to Fix the DTC P1482 GMC?

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 P1482 GMC 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 P1482 GMC Code

1. What does the OBD-II code P1482 mean on a GMC vehicle?

The P1482 code indicates a problem with the cooling fan circuit, which may affect the operation of the fan used to cool the engine.

2. What are the common symptoms of code P1482 in a GMC?

Symptoms may include engine overheating, the cooling fan not turning on, or an illuminated check engine light.

3. What causes the P1482 Cooling Fan Circuit Condition code?

Common causes include a faulty cooling fan relay, damaged wiring or connectors in the cooling fan circuit, or a malfunctioning fan motor.

4. Can I drive my GMC with the P1482 code?

Driving with this code is not recommended, as it may lead to engine overheating and potential engine damage if the cooling fan is not functioning properly.

5. How do I diagnose the P1482 code on my GMC?

Start by inspecting the cooling fan relay, wiring, and connectors for damage or corrosion. Then test the cooling fan motor and check for proper voltage at the circuit.

6. How can I fix the P1482 code on a GMC vehicle?

Repairs may involve replacing a faulty cooling fan relay, repairing damaged wiring or connectors, or replacing the cooling fan motor if it is defective.

7. What tools do I need to diagnose and fix the P1482 code?

You will need an OBD-II scanner, a multimeter, and possibly a wiring diagram for your GMC's cooling fan circuit.

8. How much does it cost to repair the P1482 code on a GMC?

Repair costs can vary, ranging from $50 to $300, depending on whether the issue is a simple wiring repair or requires replacing the cooling fan motor or relay.

9. Can a faulty cooling fan relay cause the P1482 code?

Yes, a defective cooling fan relay is a common cause of the P1482 code and should be tested during diagnosis.

10. Will clearing the P1482 code fix the problem permanently?

Clearing the code will remove it temporarily, but the underlying issue must be repaired to prevent the code and symptoms from returning.

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