Engine-Codes - Buick - P1484 BUICK

P1484 BUICK - Cooling Fan RPM Signal Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P1484 BUICK Possible Causes

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

How is the P1484 BUICK code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the P1484 BUICK code

Labor: 1.0

The cost to diagnose the P1484 BUICK code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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When is the code detected?

The Engine Control Module (ECM) has detected a cooling fan speed outside expected range

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1484 BUICK Meaning

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.

More Information

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