P0692 2018 GMC Sierra Code - Cooling Fan Speed Output Circuit High Voltage
Quick Answer
The engine cooling fan system is composed of 2 electric cooling fans, fan motors, and 2 control modules. Common causes include Faulty Cooling Fan Control Module, Cooling Fan Control Module harness is open or shorted, Cooling Fan Control Module 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
- P0692 2018 GMC Sierra indicates Cooling Fan Speed Output Circuit High Voltage.
- Common causes
- Common causes include Faulty Cooling Fan Control Module, Cooling Fan Control Module harness is open or shorted, Cooling Fan Control Module 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 P0692 2018 GMC Sierra Description
The cooling fan speed is affected by many different conditions and the ECM will adjust the duty cycle from 0 - 100 percent based on cooling system requirements. The scan tool output control is only capable of operating the cooling fan increments, between 10 - 90 percent. 90 percent is considered high-speed fan. When multiple cooling fan speed requests are received, the ECM operates the fan at the highest speed requests.
The Diagnostic Trouble Code (DTC) will be set when the commanded state of the driver and the actual state of the control circuit do not match for greater than 5 s.
What are the Possible Causes of the DTC P0692 2018 GMC Sierra?
- Faulty Cooling Fan Control Module
- Cooling Fan Control Module harness is open or shorted
- Cooling Fan Control Module circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0692 2018 GMC Sierra?
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 P0692 2018 GMC Sierra 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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Frequently Asked Questions about P0692 2018 GMC Sierra Code
1. What does the OBDII code P0692 mean on a 2018 GMC Sierra?
P0692 indicates a high voltage issue in the cooling fan speed output circuit, which controls the operation of the engine cooling fan.
2. What are the common symptoms of a P0692 code?
Symptoms may include the cooling fan running at high speed constantly, engine overheating, poor AC performance, or an illuminated check engine light.
3. What causes the P0692 code on a GMC Sierra?
Common causes include a faulty cooling fan relay, damaged or corroded wiring, a defective cooling fan motor, or a malfunctioning powertrain control module (PCM).
4. Can I drive my 2018 GMC Sierra with a P0692 code?
Driving with a P0692 code can risk engine overheating or reduced AC efficiency. It's best to address the issue promptly to avoid further damage.
5. How do you diagnose a P0692 code?
Diagnosis involves checking the cooling fan relay, inspecting the wiring and connectors for damage or corrosion, testing the cooling fan motor, and verifying the PCM functionality.
6. How do you fix a P0692 code on a GMC Sierra?
Repairs may include replacing a faulty cooling fan relay, repairing damaged wiring, replacing the cooling fan motor, or reprogramming or replacing the PCM.
7. What tools are needed to diagnose a P0692 code?
A scan tool, multimeter, and wiring diagram are essential for diagnosing the cooling fan circuit and identifying the source of the high voltage condition.
8. How much does it cost to repair a P0692 code?
The cost varies depending on the issue. Replacing a cooling fan relay could cost $50-$150, while a cooling fan motor replacement may cost $300-$700 including labor.
9. Can a dirty or corroded connector cause a P0692 code?
Yes, corroded or dirty connectors in the cooling fan circuit can create high resistance, leading to a high voltage condition.
10. Is the PCM often the cause of a P0692 code?
While rare, a malfunctioning PCM can cause a P0692 code, but it should only be considered after ruling out wiring, relay, and fan motor issues.
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