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P0693 is a diagnostic trouble code (DTC) for "Fan 2 Control Circuit Low". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $89.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
The P0693 code is stored in the PCM when the voltage reading from the electrical cooling fan control circuit is too high or too low in comparison to the manufacturer’s specifications.
The PCM detects the voltage of the cooling fan control circuit to determine if the cooling system is operating correctly. If the voltage reading is off by more than 10% in either direction, this is considered indicative of an issue, and the P0693 code will be stored within the PCM to alert the vehicle owner to the issue.
Common causes behind the P0693 code include:
In addition to the illuminated Check Engine Lamp, vehicle owners may also observe the engine overheating, and reduced performance of the air conditioner. The radiator fan may become inoperative.
After an OBD-II scanner detects the P0693 code, a technician should begin with a visual inspection of all the wiring, connectors, and other components of the cruise control system. Any damaged elements should be replaced or repaired as necessary. They should then clear the code and perform a retest of the system. If the code reappears, the technicians should activate the engine cooling fan and perform a voltage and ground test. This test can diagnose if the fan motor, or a lack of voltage is the problem. From there, the technician should continue performing repairs, clearing the code and retesting each time, until the issue has been addressed and the code does not reappear.
Often, the cooling fan motors will be replaced immediately, without a proper diagnostic procedure. In many cases, a recalled cooling fan relay is actually the culprit, and should be tested before replacing any major parts.
If the P0693 code is being detected, it should be addressed as soon as possible. Without the ability to properly cool the temperature of the engine, the vehicle will not operate properly. Overheating can lead to much more serious repairs. It is important to address this code as soon as possible once detected.
There are many ways that a technician can address a P0693 code detection. They include:
In some very rare cases, the fan motor may appear to be faulty, but the issue is actually a leak in the power steering fluid. The cooling fan motor is driven in part by hydraulic pressure from the power steering pump, so this issue can affect the performance of the fan motor. In this instance, repairing the leak in the power steering should be attempted. A failed power steering pump may also need to be replaced.
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