P1491Engine Cooling

Radiator Fan Control Relay Circuit (Dodge/Chrysler/Jeep)

P1491 is a Dodge/Chrysler/Jeep code for a radiator fan control relay circuit fault. The PCM detected an issue in the fan relay control circuit, which can prevent the cooling fan from running.

🚗 Use caution. A non-working cooling fan can lead to overheating in traffic.

MEDIUM

severity

🎯 Top Causes, Ranked by Likelihood

#1Faulty radiator fan relay$20-$120

45%

A failed relay cannot switch the fan on.

#2Wiring or connector fault$50-$300

30%

An open or shorted circuit disrupts fan control.

#3Failing cooling fan motor$100-$400

25%

A seized or high-draw fan motor sets the code.

🩺 Common Symptoms

Check engine light
Engine overheating in traffic
Cooling fan not running
High coolant temperature

💰 Repair Cost: DIY vs Shop

DIY Cost

$20-$300

Shop Cost

$120-$450

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose P1491

1Test the radiator fan relay

2Check the fan control wiring and connectors

3Test the cooling fan motor operation

4Replace the relay, wiring, or fan as needed

❓ Frequently Asked Questions

Can I drive with P1491?

With caution. If the fan does not run, the engine can overheat in slow traffic. Fix it soon.

Is P1491 a Chrysler code?

Yes, P1491 is a Dodge/Chrysler/Jeep radiator fan control relay circuit code.

What causes P1491?

A faulty fan relay, wiring problems, or a failing fan motor are common causes.

🔗 Related Codes

P0480P0691P0692