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Engine-Codes – Generic – P1652

P1652 Code - Cooling Fan 2 Relay Control Circuit Conditions

Quick Answer

The P1652 code indicates a problem with the cooling fan 2 relay control circuit in the vehicle. Common causes include Faulty relay: A malfunctioning relay can prevent the cooling fan from receiving the signal to turn on, Wiring issues: Damaged or corroded wiring in the relay control circuit can interrupt the flow of electricity, affecting the fan's operation, Engine coolant temperature sensor malfunction: If the sensor that detects the engine temperature is faulty, it may not send the signal to activate the cooling fan. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means
P1652 indicates Cooling Fan 2 Relay Control Circuit Conditions.
Common causes
Common causes include Faulty relay: A malfunctioning relay can prevent the cooling fan from receiving the signal to turn on, Wiring issues: Damaged or corroded wiring in the relay control circuit can interrupt the flow of electricity, affecting the fan's operation, Engine coolant temperature sensor malfunction: If the sensor that detects the engine temperature is faulty, it may not send the signal to activate the cooling fan.
Severity
Moderate - service should be scheduled soon.
Can I drive?
The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P1652 Description

The P1652 code indicates a problem with the cooling fan 2 relay control circuit in the vehicle. The cooling fan plays a crucial role in maintaining the optimal temperature of the engine by dissipating heat generated during operation. The relay control circuit is responsible for activating the cooling fan at the appropriate times to prevent the engine from overheating.

OBDII Code P1652 - Cooling Fan 2 Relay Control Circuit Conditions
P1652 Code - Cooling Fan 2 Relay Control Circuit Conditions

Common Causes of P1652

  1. Faulty relay: A malfunctioning relay can prevent the cooling fan from receiving the signal to turn on.
  2. Wiring issues: Damaged or corroded wiring in the relay control circuit can interrupt the flow of electricity, affecting the fan's operation.
  3. Engine coolant temperature sensor malfunction: If the sensor that detects the engine temperature is faulty, it may not send the signal to activate the cooling fan.
  4. Blown fuse: A blown fuse in the cooling fan circuit can also trigger this code.

Symptoms of P1652

  1. Engine overheating: The most common symptom associated with this code is engine overheating, which may result in the vehicle's temperature gauge rising above normal levels.
  2. Reduced air conditioning performance: The cooling fan also helps cool the air conditioning condenser, so a malfunction in the fan relay control circuit can lead to reduced air conditioning performance.
  3. Engine running hot at idle: The engine may run hotter than usual when the vehicle is idling, as the cooling fan may not be activating as it should.
  4. Check engine light: The illumination of the check engine light on the dashboard is a common indicator of this issue.

How to Fix P1652

  1. Diagnostic scan: Use a diagnostic scanner to retrieve the trouble code and pinpoint the exact issue with the cooling fan 2 relay control circuit.
  2. Check relay: Inspect the cooling fan relay for any signs of damage or malfunction. Replace the relay if necessary.
  3. Check wiring: Thoroughly inspect the wiring in the relay control circuit for any damage or corrosion. Repair or replace any faulty wiring.
  4. Test engine coolant temperature sensor: Test the engine coolant temperature sensor to ensure it is sending accurate signals. Replace the sensor if needed.
  5. Reset code: After repairing the issue, reset the trouble code using the diagnostic scanner to clear the check engine light.

Cost to Fix P1652

The cost to repair the cooling fan 2 relay control circuit can vary depending on the specific cause of the issue and the labor rates in your area. On average, the repair cost for this type of issue can range from $150 to $300, including parts and labor. However, it's important to note that prices may differ based on the location, vehicle make and model, and the extent of the repairs needed. Additionally, diagnostic time and labor rates at auto repair shops can fluctuate, so it's advisable to consult with a professional technician for a more accurate estimate.

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Code P1652 Information for Specific Makes

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.

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