AutoCodes – Generic – P1474

P1474 Code - Low Fan Control Primary Circuit Malfunction

Quick Answer

Monitors the Low Fan Control (LFC) primary circuit output from the Powertrain Control Module (PCM). Common causes include Faulty Cooling Fan, Faulty Cooling Fan Relay, Cooling Fan 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: P1474 indicates Low Fan Control Primary Circuit Malfunction.
Common causes: Common causes include Faulty Cooling Fan, Faulty Cooling Fan Relay, Cooling Fan 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 29,249

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 P1474 Description

Monitors the Low Fan Control (LFC) primary circuit output from the Powertrain Control Module (PCM). The test fails if the PCM grounds the LFC circuit, excessive current draw is detected on the LFC circuit, or with the LFC circuit not grounded by the PCM, voltage is not detected on the LFC circuit (the PCM expects to detect VPWR voltage coming through the low speed FC relay coil to the LFC circuit).

OBDII Code P1474 - Low Fan Control Primary Circuit Malfunction - AutoCodes.com — P1474 Code - Low Fan Control Primary Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P1474?

Faulty Cooling Fan
Faulty Cooling Fan Relay
Cooling Fan harness is open or shorted
Cooling Fan circuit poor electrical connection

How to Fix the DTC P1474?

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 P1474 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 P1474 code?

Need more information on how to fix the P1474 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1474 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1474 Audi — EVAP Canister Purge Solenoid Valve Electrical Malfunction
P1474 Buick — Particulate Matter Sensor Electrode Supply Circuit
P1474 Cadillac — Particulate Matter Sensor Electrode Supply Circuit
P1474 Chevrolet — Particulate Matter Sensor Electrode Supply Circuit
P1474 Ford — Low Fan Control Primary Circuit
P1474 GMC — Particulate Matter Sensor Electrode Supply Circuit
P1474 Lincoln — Low Fan Control Primary Circuit
P1474 Mazda — Cooling Fan Control Circuit Excessive Current Draw
P1474 Mercury — Low Fan Control Primary Circuit
P1474 Volkswagen — EVAP Canister Purge Solenoid Valve Electrical Malfunction

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 P1474 Code

1. What are the common symptoms of OBDII code P1474 (Low Fan Control Primary Circuit Malfunction)?

- Common symptoms include overheating engine, erratic fan operation, and illumination of the check engine light.

2. What are the possible causes of OBDII code P1474?

- The code may be triggered by a faulty cooling fan motor, damaged wiring or connectors, a defective cooling fan relay, or a problem with the engine control module (ECM).

3. How can I diagnose the issue related to OBDII code P1474?

- Diagnosing the issue involves checking the cooling fan operation, inspecting the wiring and connectors, testing the cooling fan relay, and using an OBDII scanner to retrieve specific diagnostic trouble codes.

4. Can I continue driving my vehicle with OBDII code P1474?

- It is not recommended to drive the vehicle with this code as it can lead to engine overheating and potential damage. It's best to address the issue promptly.

5. What are some repair tips for fixing OBDII code P1474?

- Repair tips include replacing the cooling fan motor if faulty, repairing or replacing damaged wiring and connectors, testing and replacing the cooling fan relay, and checking the ECM for any issues.

6. Is it possible to reset OBDII code P1474 without fixing the underlying issue?

- Resetting the code without addressing the root cause will only temporarily clear the check engine light. The issue will likely resurface until properly repaired.

7. Can a DIY enthusiast fix OBDII code P1474 at home?

- Depending on the root cause, DIY enthusiasts may be able to fix the issue at home by following repair guides, using basic tools, and having some mechanical knowledge.

8. How much does it typically cost to repair OBDII code P1474 at a professional auto repair shop?

- The cost of repairing this code can vary depending on the underlying issue, but it may range from $100 to $500 or more, including parts and labor.

9. Will fixing OBDII code P1474 improve my vehicle's performance and fuel efficiency?

- Yes, resolving this code can help prevent engine overheating, improve cooling system efficiency, and potentially enhance overall vehicle performance and fuel efficiency.

10. How often does OBDII code P1474 occur in vehicles, and is it a common issue?

- While not as common as some other OBDII codes, P1474 can occur in vehicles with cooling fan system malfunctions, especially in older vehicles or those with high mileage.