AutoCodes – Chevrolet – P0694 Chevrolet

P0694 Chevrolet Code - Cooling Fan 2 Control Circuit High

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: P0694 Chevrolet indicates Cooling Fan 2 Control Circuit High.
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 1,648

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 P0694 Chevrolet 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 P0694 Chevrolet - Cooling Fan 2 Control Circuit High - AutoCodes.com — P0694 Chevrolet Code - Cooling Fan 2 Control Circuit High

What does this mean?

What are the Possible Causes of the DTC P0694 Chevrolet?

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 P0694 Chevrolet?

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 P0694 Chevrolet 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 P0694 Chevrolet code?

Need more information on how to fix the P0694 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0694 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 P0694 Chevrolet Code

1. What are the common symptoms of OBDII code P0694 in a Chevrolet related to Cooling Fan 2 Control Circuit High?

- Common symptoms may include the cooling fan running at high speed constantly, engine overheating, and the Check Engine light being illuminated.

2. What are some potential causes of OBDII code P0694 Cooling Fan 2 Control Circuit High in a Chevrolet?

- Possible causes can include a faulty cooling fan relay, a damaged wiring harness, a malfunctioning cooling fan motor, or issues with the engine control module (ECM).

3. How can I diagnose the source of OBDII code P0694 in my Chevrolet?

- Diagnosing the issue may involve inspecting the cooling fan relay, checking the wiring for any damage or loose connections, testing the cooling fan motor, and using a diagnostic scanner to read the code and check for any related trouble codes.

4. Can I drive my Chevrolet with OBDII code P0694 present?

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

5. How can I repair OBDII code P0694 Cooling Fan 2 Control Circuit High in my Chevrolet?

- Repair options may include replacing the cooling fan relay, repairing any damaged wiring, replacing the cooling fan motor if needed, and resetting the ECM after the repairs are completed.

6. Will resetting the Check Engine light resolve OBDII code P0694 in a Chevrolet?

- Resetting the Check Engine light will only clear the code temporarily. To address the underlying issue, proper diagnostics and repairs are necessary.

7. How much does it typically cost to fix OBDII code P0694 in a Chevrolet?

- The cost of repairs can vary depending on the exact cause of the issue and the labor rates in your area. It's recommended to get a diagnostic done to determine the specific repairs needed.

8. Can a DIY enthusiast fix OBDII code P0694 in a Chevrolet?

- Depending on your skill level and access to tools, some DIY enthusiasts may be able to address this code by replacing components like the cooling fan relay or checking for wiring issues. However, complex diagnosis and repairs may require professional assistance.

9. What are the long-term effects of ignoring OBDII code P0694 in a Chevrolet?

- Ignoring this code can lead to engine overheating, potential damage to engine components, and even engine failure. It's essential to address cooling system issues promptly to prevent further damage.

10. Is OBDII code P0694 specific to Chevrolet vehicles, or can it occur in other car makes?

- While this specific code is related to Chevrolet vehicles, similar issues with the cooling fan control circuit can occur in other car makes and models as well. The diagnostic and repair steps may vary depending on the vehicle manufacturer.