AutoCodes – RAM – P1489 RAM

P1489 RAM Code - High Speed Radiator Fan Control Relay Condition

Quick Answer

With the key on or engine running, system voltage over 10v, the Powertrain Control Module (PCM) detects a shorted or open condition in the high-speed Radiator Fan Relay circuit for 3 seconds. Common causes include Faulty Radiator Fan Control Relay, Radiator Fan Control Relay harness is open or shorted, Radiator Fan Control Relay 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: P1489 RAM indicates High Speed Radiator Fan Control Relay Condition.
Common causes: Common causes include Faulty Radiator Fan Control Relay, Radiator Fan Control Relay harness is open or shorted, Radiator Fan Control Relay 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 538

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 Jul 31, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1489 RAM Description

With the key on or engine running, system voltage over 10v, the Powertrain Control Module (PCM) detects a shorted or open condition in the high-speed Radiator Fan Relay circuit for 3 seconds. Test the fan relay resistance (it should be 30-70 ohms). Refer to code repair chart in other manuals or media. The Diagnostic Trouble Code (DTC) will set when the Powertrain Control Module has detected an open or shorted condition in the radiator fan relay circuit.

OBDII Code P1489 RAM - High Speed Radiator Fan Control Relay Condition - AutoCodes.com — P1489 RAM Code - High Speed Radiator Fan Control Relay Condition

What does this mean?

What are the Possible Causes of the DTC P1489 RAM?

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

How to Fix the DTC P1489 RAM?

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 P1489 RAM 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 P1489 RAM Code

1. What are the common symptoms of OBDII code P1489 RAM titled High Speed Radiator Fan Control Relay Condition?

- Common symptoms include the radiator fan running at high speed constantly, engine overheating, and the Check Engine light illuminating.

2. What could cause OBDII code P1489 RAM to trigger?

- This code is typically triggered by a fault in the high-speed radiator fan control relay circuit, such as a faulty relay, wiring issue, or a problem with the fan motor.

3. How can I diagnose the high-speed radiator fan control relay circuit for OBDII code P1489 RAM?

- Use a multimeter to test the relay, check the wiring for any damage or loose connections, and ensure the fan motor is functioning properly.

4. What are the repair options for fixing OBDII code P1489 RAM?

- Repair options may include replacing the high-speed radiator fan control relay, repairing any damaged wiring, or replacing the radiator fan motor if necessary.

5. Can OBDII code P1489 RAM cause engine damage if left unrepaired?

- Yes, leaving this issue unresolved can lead to engine overheating, which can cause significant damage if not addressed promptly.

6. Are there any DIY tips for resolving OBDII code P1489 RAM?

- While diagnosing and repairing electrical issues can be challenging, you can start by checking the relay and fuses, and inspecting the wiring for any visible damage.

7. Can a faulty coolant temperature sensor trigger OBDII code P1489 RAM?

- A faulty coolant temperature sensor is unlikely to directly trigger this code, but it can contribute to engine overheating issues that may lead to the code being set.

8. Is it safe to drive with OBDII code P1489 RAM active?

- It is not recommended to drive with this code active, as it can result in engine overheating and potential damage if the cooling system is not operating correctly.

9. How much does it typically cost to repair OBDII code P1489 RAM at a mechanic or dealership?

- Repair costs can vary depending on the exact cause of the issue, but replacing the high-speed radiator fan control relay may cost between $100 to $200 at a repair shop.

10. Will resetting the OBDII code P1489 RAM clear the issue permanently?

- Resetting the code without addressing the underlying cause will not fix the problem permanently, as the issue causing the code will likely trigger it again until repaired.