AutoCodes – GMC – P0693 GMC

P0693 GMC Code - Cooling Fan 2 Control Circuit Low

Quick Answer

The Engine Control Module (ECM) grounds the low-speed relay, which is the Fan Low relay, and the high-speed relay, which is the Fan High relay, control circuits through an internal solid-state device called a driver. Common causes include Faulty Cooling Fan 2 Relay, Cooling Fan 2 Relay harness is open or shorted, Cooling Fan 2 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: P0693 GMC indicates Cooling Fan 2 Control Circuit Low.
Common causes: Common causes include Faulty Cooling Fan 2 Relay, Cooling Fan 2 Relay harness is open or shorted, Cooling Fan 2 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 1,338

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 13, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0693 GMC Description

The Engine Control Module (ECM) grounds the low-speed relay, which is the Fan Low relay, and the high-speed relay, which is the Fan High relay, control circuits through an internal solid-state device called a driver. The primary function of the driver is to supply the ground for the component being controlled. Each driver has a fault line that is monitored by the ECM. When the ECM is commanding a component ON, the voltage potential of the control circuit should be low, near 0 volts. When the ECM is commanding the control circuit to a component OFF, the voltage potential of the circuit should be high, near battery voltage. If the ECM detects that the actual state of the control circuit does not match the expected state, a Diagnostic Trouble Code (DTC) will set.

OBDII Code P0693 GMC - Cooling Fan 2 Control Circuit Low - AutoCodes.com — P0693 GMC Code - Cooling Fan 2 Control Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0693 GMC?

Faulty Cooling Fan 2 Relay
Cooling Fan 2 Relay harness is open or shorted
Cooling Fan 2 Relay circuit poor electrical connection
Faulty Cooling Fan 1
Faulty Engine Control Module (ECM)

How to Fix the DTC P0693 GMC?

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 P0693 GMC 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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Need Help with the Code?

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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 P0693 GMC Code

1. What are the common symptoms of OBDII code P0693 in a GMC related to Cooling Fan 2 Control Circuit Low?

The common symptoms include overheating of the engine, the cooling fan not working properly, and the vehicle's temperature gauge showing higher than normal temperatures.

2. What are the possible causes of OBDII code P0693 GMC Cooling Fan 2 Control Circuit Low?

The causes can include a faulty cooling fan control module, a defective cooling fan motor, damaged wiring or connectors in the cooling fan circuit, or a malfunctioning engine control module (ECM).

3. How can I diagnose OBDII code P0693 in my GMC for Cooling Fan 2 Control Circuit Low?

You can use a scan tool to check for the specific code, inspect the cooling fan components for damage or wear, and test the wiring and connectors for any connectivity issues.

4. Can I continue driving my GMC with OBDII code P0693 related to Cooling Fan 2 Control Circuit Low?

It is not recommended to continue driving the vehicle with this code as it can lead to engine overheating and potential damage. It is advised to address the issue promptly.

5. What are some repair tips for fixing OBDII code P0693 GMC Cooling Fan 2 Control Circuit Low?

Repair tips include checking and replacing the cooling fan control module or motor, repairing any damaged wiring or connectors, and resetting the ECM after completing the repairs.

6. Is it possible to reset OBDII code P0693 in a GMC for Cooling Fan 2 Control Circuit Low without fixing the underlying issue?

Resetting the code without addressing the root cause will only temporarily clear the error code. The underlying issue causing the code will persist until repaired.

7. Can a DIY enthusiast fix OBDII code P0693 Cooling Fan 2 Control Circuit Low in a GMC?

Depending on the individual's automotive repair skills and knowledge, a DIY enthusiast may be able to diagnose and repair this code. However, complex electrical issues may require professional assistance.

8. How much does it typically cost to repair OBDII code P0693 GMC Cooling Fan 2 Control Circuit Low?

The cost of repairs can vary based on the specific issue causing the code, the need for replacement parts, and labor charges. It is advisable to obtain quotes from mechanics or repair shops.

9. Are there any preventive measures to avoid OBDII code P0693 related to Cooling Fan 2 Control Circuit Low in a GMC?

Regular maintenance, such as checking the cooling system components, inspecting wiring for wear, and addressing any overheating issues promptly, can help prevent this code from occurring.

10. How long does it usually take to repair OBDII code P0693 in a GMC for Cooling Fan 2 Control Circuit Low?

The repair time can vary depending on the complexity of the issue and the availability of parts. Simple repairs may take a few hours, while more involved repairs could require a day or more.