AutoCodes – Suzuki – P0691 Suzuki

P0691 Suzuki Code - Cooling Fan 1 Control Circuit Low Voltage

Quick Answer

The Engine Control Module (ECM) monitors the Cooling Fan 1 Control Circuit. Common causes include Faulty Fan 1 Relay, Fan 1 Relay harness is open or shorted, Fan 1 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: P0691 Suzuki indicates Cooling Fan 1 Control Circuit Low Voltage.
Common causes: Common causes include Faulty Fan 1 Relay, Fan 1 Relay harness is open or shorted, Fan 1 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 4,705

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 May 05, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0691 Suzuki Description

The Engine Control Module (ECM) monitors the Cooling Fan 1 Control Circuit. The ECM sets the OBDII code when the Cooling Fan 1 Control Circuit is not to the factory specifications.

OBDII Code P0691 Suzuki - Cooling Fan 1 Control Circuit Low Voltage - AutoCodes.com — P0691 Suzuki Code - Cooling Fan 1 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0691 Suzuki?

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

How to Fix the DTC P0691 Suzuki?

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 P0691 Suzuki 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 P0691 Suzuki Code

1. What are common symptoms of OBDII code P0691 in a Suzuki related to Cooling Fan 1 Control Circuit Low Voltage?

- Common symptoms include overheating of the engine, the cooling fan not turning on, and the vehicle displaying a check engine light.

2. What are the possible causes of OBDII code P0691 in a Suzuki indicating Cooling Fan 1 Control Circuit Low Voltage?

- Possible causes include a faulty cooling fan relay, a malfunctioning cooling fan motor, damaged wiring or connections in the cooling fan circuit, or a defective Engine Control Module (ECM).

3. How can I diagnose the issue related to OBDII code P0691 in a Suzuki associated with Cooling Fan 1 Control Circuit Low Voltage?

- Diagnose the issue by checking the cooling fan operation, inspecting the cooling fan relay and motor, testing the voltage in the circuit, and scanning the ECM for related error codes.

4. What repair tips can help resolve OBDII code P0691 in a Suzuki for Cooling Fan 1 Control Circuit Low Voltage?

- Repair tips include replacing the cooling fan relay or motor, repairing any damaged wiring or connections, resetting the ECM after repairs, and retesting the cooling fan system.

5. Can driving with OBDII code P0691 indicating Cooling Fan 1 Control Circuit Low Voltage in a Suzuki cause further damage?

- Driving with this code can lead to engine overheating and potential damage if the cooling fan does not operate properly. It's recommended to address the issue promptly.

6. Is it safe to continue driving my Suzuki with OBDII code P0691 related to Cooling Fan 1 Control Circuit Low Voltage?

- It is not recommended to drive the vehicle with this code, as it can result in engine overheating and potential damage. Have the issue diagnosed and repaired as soon as possible.

7. Will resetting the ECM clear OBDII code P0691 for Cooling Fan 1 Control Circuit Low Voltage in my Suzuki?

- Resetting the ECM may clear the code temporarily, but it is essential to address the underlying issue causing the code to prevent it from reoccurring.

8. Can a DIY enthusiast fix OBDII code P0691 in a Suzuki associated with Cooling Fan 1 Control Circuit Low Voltage?

- DIY enthusiasts with automotive repair experience can attempt to diagnose and repair this code by checking the cooling fan system components and related circuitry.

9. How much does it typically cost to repair OBDII code P0691 related to Cooling Fan 1 Control Circuit Low Voltage in a Suzuki?

- The cost of repair can vary depending on the exact cause of the issue. Replacing a cooling fan relay or motor may cost between $50 to $200, while addressing wiring issues could range from $100 to $300.

10. What are the long-term consequences of ignoring OBDII code P0691 in a Suzuki indicating Cooling Fan 1 Control Circuit Low Voltage?

- Ignoring this code can lead to repeated overheating, potential engine damage, and increased repair costs. It is crucial to address the issue promptly to avoid further complications.