P1660 Code - Cooling Fan Control Circuit
Quick Answer
P1660 indicates Cooling Fan Control Circuit. Common causes include Faulty Cooling Fan Relay, Faulty Cooling Fan, Cooling Fan harness is open or shorted. 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
- P1660 indicates Cooling Fan Control Circuit.
- Common causes
- Common causes include Faulty Cooling Fan Relay, Faulty Cooling Fan, Cooling Fan harness is open or shorted.
- 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 P1660 Description
What are the Possible Causes of the DTC P1660?
- Faulty Cooling Fan Relay
- Faulty Cooling Fan
- Cooling Fan harness is open or shorted
- Cooling Fan circuit poor electrical connection
How to Fix the DTC P1660?
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 P1660 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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Information for Specific Makes
- P1660 Acura — AT To ECM Signal Failure
- P1660 Audi — Engine Coolant Blower Motor Speed 1 Short To Ground
- P1660 Buick — Cooling Fan Control Circuit
- P1660 Cadillac — Cooling Fan Control Circuit
- P1660 Chevrolet — Cooling Fan Control Circuit
- P1660 Ford — Output Circuit Check Signal High
- P1660 GMC — Cooling Fan Control Circuit
- P1660 Honda — AT To ECM Signal Failure
- P1660 Hyundai — Cruise Control Switch Malfunction
- P1660 Isuzu — AT To ECM Signal Failure
- P1660 Volkswagen — Engine Coolant Blower Motor Speed 1 Short To Ground
Frequently Asked Questions about P1660 Code
1. What does the OBDII code P1660 indicate?
The P1660 code signifies an issue with the cooling fan control circuit, indicating a malfunction in the circuit responsible for operating the vehicle’s cooling fans.
2. What are common symptoms of code P1660?
Symptoms of a P1660 code may include overheating of the engine, the cooling fan failing to activate or deactivate properly, and the check engine light coming on.
3. What could cause a P1660 code to appear?
Causes of the P1660 code can include faults in the cooling fan relay, issues with the cooling fan motor, wiring problems in the cooling fan circuit, or a defective engine control module (ECM).
4. How can I diagnose the P1660 code in my vehicle?
Diagnosing the P1660 code typically involves checking the cooling fan operation, inspecting the relay and motor for faults, and using a multimeter to check for any open or short circuits in the wiring.
5. What steps are involved in repairing a P1660 code?
Repairing a P1660 code may involve replacing the faulty cooling fan relay or motor, repairing or replacing damaged wires in the cooling fan circuit, or in rare cases, replacing the ECM.
6. Is it safe to drive with the P1660 code?
Driving with a P1660 code can be risky as it may lead to engine overheating, especially in hot weather or when driving in heavy traffic, which can cause further engine damage.
7. How urgent is it to address a P1660 code?
It is quite urgent to address a P1660 code because failing to do so can result in overheating of the engine, which can lead to more serious mechanical issues and potentially expensive repairs.
8. Can a P1660 code affect my vehicle's fuel economy?
Yes, a P1660 code can indirectly affect fuel economy. If the engine operates at a higher temperature due to cooling fan issues, it may lead to decreased efficiency and increased fuel consumption.
9. What tools are required to diagnose and repair a P1660 code?
Tools needed may include a digital multimeter for electrical testing, a scan tool to read the code and monitor cooling fan operation, and basic hand tools to access and replace components.
10. Could ignoring a P1660 code lead to other vehicle issues?
Yes, ignoring a P1660 code can lead to the engine consistently running at higher temperatures, which increases the risk of engine damage such as warped cylinder heads or failed head gaskets, leading to more extensive repairs.
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