P0691 Jeep Code - Cooling Fan 1 Control Circuit Low
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 Jeep indicates Cooling Fan 1 Control Circuit Low.
- 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.
Code P0691 Jeep Description
What are the Possible Causes of the DTC P0691 Jeep?
- 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 Jeep?
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 Jeep 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 P0691 Jeep code?
Need more information on how to fix the P0691 Jeep code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0691 Jeep code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0691 Jeep Code
1. What does the OBDII code P0691 mean on a Jeep?
P0691 indicates a low voltage condition in the Cooling Fan 1 Control Circuit, which may prevent the cooling fan from operating correctly.
2. What are the common symptoms of a P0691 code on a Jeep?
Symptoms may include engine overheating, the cooling fan not turning on, an illuminated check engine light, or reduced air conditioning performance.
3. What causes the P0691 code to appear on a Jeep?
Potential causes include a faulty cooling fan relay, damaged wiring or connectors in the fan circuit, a bad cooling fan motor, or a failing Engine Control Module (ECM).
4. Can I drive my Jeep with a P0691 code?
Driving with a P0691 code is not recommended, as it can lead to engine overheating and potential damage if the cooling fan is not functioning properly.
5. How do I diagnose a P0691 code on my Jeep?
Start by inspecting the cooling fan relay, wiring, and connections for damage or corrosion. Use a multimeter to check for proper voltage and continuity in the Cooling Fan 1 Control Circuit.
6. How can I fix the P0691 code on a Jeep?
Repairs may include replacing a faulty cooling fan relay, repairing damaged wiring, or replacing the cooling fan motor if it is defective.
7. Can a bad cooling fan motor cause the P0691 code?
Yes, a faulty cooling fan motor can draw excess current or fail to operate, triggering the P0691 code.
8. Will clearing the P0691 code fix the problem on my Jeep?
Clearing the code will remove it temporarily, but the issue will return if the underlying problem, such as a damaged circuit or faulty component, is not addressed.
9. How much does it cost to repair a P0691 code on a Jeep?
Repair costs vary depending on the cause but may range from $50 for a relay replacement to $300 or more if the cooling fan motor needs replacing.
10. Can a failing ECM cause the P0691 code on a Jeep?
While rare, a failing Engine Control Module can cause the P0691 code if it cannot properly control the Cooling Fan 1 circuit.
Discuss the causes and fixes for P0691 Jeep OBDII Code
Code P0691 Jeep comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
