AutoCodes – Cadillac – P0694 Cadillac

P0694 Cadillac 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 Cadillac 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 710

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC P0694 Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac code?

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

Need Help with the Code?

Get the P0694 Cadillac 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 Cadillac Code

1. What does the OBDII code P0694 mean on a Cadillac?

P0694 indicates a high voltage issue in the Cooling Fan 2 Control Circuit, suggesting a problem with the fan's electrical system or control module.

2. What are the common symptoms of P0694 on a Cadillac?

Symptoms may include the engine overheating, cooling fans running constantly or not operating, and the Check Engine Light being illuminated.

3. What causes the P0694 code in a Cadillac?

Common causes include a faulty cooling fan motor, damaged wiring or connectors, a malfunctioning cooling fan relay, or a defective powertrain control module (PCM).

4. Can I drive my Cadillac with the P0694 code?

Driving with P0694 is not recommended, as it may lead to engine overheating and potential damage if the cooling fans are not functioning properly.

5. How do I diagnose the P0694 code on my Cadillac?

Start by checking the cooling fan relay, inspecting wiring and connectors for damage, and testing the cooling fan motor. A scan tool can also help monitor fan circuit voltage.

6. How do I fix the P0694 code on a Cadillac?

Repairs may involve replacing the cooling fan relay, repairing damaged wiring, replacing the cooling fan motor, or reprogramming the PCM if necessary.

7. How much does it cost to repair the P0694 code on a Cadillac?

Repair costs vary but typically range from $100 to $500, depending on whether the issue is a simple relay replacement or a more complex electrical repair.

8. Can a bad PCM cause the P0694 code?

Yes, a malfunctioning PCM can lead to incorrect voltage signals in the Cooling Fan 2 Control Circuit, triggering the P0694 code.

9. Will clearing the P0694 code fix the issue on my Cadillac?

Clearing the code will reset the Check Engine Light temporarily, but the underlying problem must be addressed to prevent the code from returning.

10. How can I prevent the P0694 code from occurring again?

Regularly inspect and maintain the cooling fan system, including checking wiring, connectors, and relays for wear or damage. Promptly address any cooling system issues.