P0690 code — how to fix error fast
The P0690 code is a touchstone for ensuring a vehicle's optimal function.
Getting any sort of engine-related OBD2 code on a diagnostic scan of your car can lead to serious trouble, and code P0690 is among the most common ones. While it doesn’t directly inflict damage on your engine, it can do so in the long run unless you repair it on time.
Since there are various reasons that could be behind the code P0690, our team decided to help. We’ll lead you through the P0690 code meaning and the most common reasons that may have triggered the code in your car. We’ll also go over the most effective ways of solving the problem and removing the code, as well as preventing it from re-appearing, so stay tuned.
Why you can trust REREV’s OBD2 code advice: Our automotive expert researchers with experienced mechanics undertakes a thorough research methodology to deliver precise insights on OBD codes. Find out more about OBD2 codes research process..
What does the P0690 code mean?
The P0690 code is a diagnostic trouble code that indicates a problem with the control circuit of the engine cooling fan. This code is essential to understand because it can indicate a range of issues that can affect your car’s performance and safety.
This can lead to engine cooling problems and therefore overheating and physical damage done to crucial engine components.
What causes the P0690 code?
While the code mostly relates to the faulty engine cooling fan circuit, there are other reasons why it may be active in your case. We’ll help you by listing all the potential reasons behind the code so you can find an appropriate fix:
Faulty cooling fan relay
The cooling fan relay is responsible for turning on the engine’s cooling fan when the temperature rises above a certain level. A faulty cooling fan relay can cause the fan to stop working, resulting in the engine overheating. Symptoms of a faulty cooling fan relay include an overheating engine, a non-functioning cooling fan, and the P0690 code.
Blown fuse
A blown fuse can cause the cooling fan to stop working, leading to the engine overheating. The P0690 code can appear on the dashboard if the fuse responsible for powering the cooling fan blows.
Damaged wiring
Damage to the wiring that connects the cooling fan to the car’s electrical system can cause the fan to stop working, leading to the engine overheating. The P0690 code can appear if the wiring is damaged and needs to be repaired or replaced.
Faulty engine control module (ECM)
The ECM controls various aspects of your car’s performance, including the cooling fan. A faulty ECM can cause the cooling fan to stop working, leading to the P0690 code.
Which car models does the P0690 code affect the most?
This code is often associated with certain car models that are known to have issues with their cooling systems. We did some research on such models, so here’s a list of cars that are most likely to be affected by the P0690 code are:
- Ford Focus: The 2012-2018 Ford Focus models have been known to have problems with their cooling fans, which can trigger the P0690 code.
- Chevrolet Malibu: The 2013-2014 Chevrolet Malibu models are also prone to cooling system issues that can cause the P0690 code to appear.
- Dodge Charger: The 2011-2016 Dodge Charger models have been reported to have problems with their cooling fan relays, which can trigger the P0690 code.
- Jeep Wrangler: The 2012-2017 Jeep Wrangler models have been known to have issues with their cooling fans, which can cause the P0690 code to appear.
How to diagnose the P0690 code
To diagnose the code P0690, you first need to know about the common reasons behind the code. Now that we’ve covered that, here are the main ways of testing the components that may possibly lead to the code:
Use a diagnostic scanner
To diagnose the P0690 code, you will need a diagnostic tool that can read the code and identify the potential cause. This tool can be purchased or rented from an auto parts store and you can also use it to read other related codes that may reveal a bit more about the possible issue that triggered the P0690 code.
Visual inspection
Performing a visual inspection of the cooling fan, wiring, and relay to determine if there is any damage or wear can also help. You can physically check the cooling fan by looking under the hood, and you can leave the wiring and relay testing to a trusted mechanic.
Electrical testing
Test the electrical connections and wiring to determine if there is any damage or wear. You can use a multimeter for this purpose and it’s best to examine everything from the fan speed sensor to wiring and connections related to the fan itself.
How to fix the P0690 code
Fixing the P0690 code depends on the underlying cause, which can be any of the factors mentioned above. The following are potential fixes for each cause of the P0690 code, along with cost estimates:
Faulty cooling fan relay
Replacing the cooling fan relay is a potential fix for the P0690 code. If the relay can’t power the cooling fan, simply replacing it should do the trick. This repair can set you back for around $100 to $200.
Blown fuse replacement
If there’s a blown fuse that controls the cooling fan operation, you can simply replace it and the code should be removed. This one is among the most affordable solutions since it can cost anywhere from $5 to $20 to replace a blown fuse.
Repairing damaged wiring
Repairing or replacing the damaged wiring is a potential fix for the P0690 code. The cost of this fix can range from $100 to $500, depending on the extent of the damage.
Faulty engine control module (ECM) repairs
If the ECM is the reason behind the code, you can reprogram it or repair it by restarting the system. This can be done by disconnecting the negative battery terminal and connecting it back after.
In case there’s nothing else you can do, replacing the ECM will solve the code. The cost of this fix can range from $500 to $1000, depending on the make and model of your car.
How to prevent the P0690 code
Preventing the P0690 code requires routine maintenance and proper care of your car’s cooling system. The following are preventative measures you can take to avoid the P0690 code:
- Perform regular maintenance such as oil changes and engine inspections
- Take care of the car’s engine cooling system
- Listen or visually inspect the cooling fan to see if it’s working from time to time
If you are unsure of how to diagnose or fix the P0690 code, seek professional help from a mechanic or a car dealership.
Our take
In conclusion, the P0690 code can indicate a range of issues with your car’s cooling system. It is essential to diagnose and fix the problem as soon as possible to avoid further damage to your car’s engine and ensure your safety on the road.
By following the guide proposed by our team, you can do just that for your car and prevent the code from re-appearing after fixing the code.
Can I continue to drive my car if the P0690 code appears?
It’s generally not recommended to continue driving your car if the P0690 code appears. A malfunctioning cooling fan system can cause your engine to overheat, which can lead to serious damage or even engine failure.
How much does it cost to fix the P0690 code?
The cost of fixing the P0690 code can vary depending on the make and model of your vehicle and the extent of the repairs needed. In general, replacing a faulty cooling fan relay or other components of the cooling system can cost anywhere from a few hundred to over a thousand dollars.
Can I fix the P0690 code myself?
Unless you have experience working with automotive electrical systems, it’s not recommended to attempt to fix the P0690 code yourself. Diagnosing and repairing issues with your vehicle’s cooling system requires specialized knowledge and tools, and attempting to fix it yourself could result in further damage or even injury.
