AutoCodes – GMC – P1480 GMC

P1480 GMC Code - Cooling Fan 1 Control Circuit High

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: P1480 GMC indicates Cooling Fan 1 Control Circuit High.
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 4,407

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 P1480 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 P1480 GMC - Cooling Fan 1 Control Circuit High - AutoCodes.com — P1480 GMC Code - Cooling Fan 1 Control Circuit High

What does this mean?

What are the Possible Causes of the DTC P1480 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 P1480 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 P1480 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.

Need more information about the P1480 GMC 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 P1480 GMC Code

1. What does the OBDII code P1480 mean on a GMC vehicle?

P1480 indicates an issue with the Cooling Fan 1 Control Circuit, specifically that the circuit is experiencing a high voltage condition.

2. What are the common symptoms of code P1480 on a GMC?

Symptoms may include the engine overheating, the cooling fan not operating properly, the Check Engine Light illuminating, or unusual fan noise.

3. What causes the P1480 code on a GMC?

Common causes include a faulty cooling fan relay, damaged wiring or connectors in the fan control circuit, a malfunctioning cooling fan motor, or issues with the Powertrain Control Module (PCM).

4. Can I drive my GMC with a P1480 code?

Driving with a P1480 code is not recommended, as it may lead to engine overheating, which can cause severe engine damage.

5. How do I diagnose the P1480 code on my GMC?

Diagnosis involves checking the cooling fan relay, inspecting the wiring and connectors for damage, testing the cooling fan motor, and using a scan tool to monitor fan operation.

6. How do I fix the P1480 code on my GMC?

Repairs may include replacing a faulty cooling fan relay, repairing or replacing damaged wiring or connectors, replacing the cooling fan motor, or reprogramming or replacing the PCM if necessary.

7. How much does it cost to repair the P1480 code on a GMC?

Repair costs can vary but typically range from $100 to $500 depending on whether the issue is with the relay, motor, wiring, or PCM.

8. Can a faulty cooling fan motor trigger the P1480 code?

Yes, a faulty cooling fan motor can cause a high voltage condition in the circuit and trigger the P1480 code.

9. Is the P1480 code specific to GMC vehicles?

While P1480 is a standard OBDII code, its exact meaning and troubleshooting steps may vary slightly across manufacturers. For GMC, it specifically refers to the Cooling Fan 1 Control Circuit High.

10. Will clearing the P1480 code fix the problem?

Clearing the code may turn off the Check Engine Light temporarily, but the issue will persist until the underlying cause is resolved.