P0939 Code - Hydraulic Oil Temperature Sensor Circuit Low
Quick Answer
The P0939 code indicates a problem with the hydraulic oil temperature sensor circuit being lower than the normal operating range. Common causes include Faulty hydraulic oil temperature sensor, Wiring issues or shorts in the sensor circuit, Malfunctioning transmission control module. 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
- P0939 indicates Hydraulic Oil Temperature Sensor Circuit Low.
- Common causes
- Common causes include Faulty hydraulic oil temperature sensor, Wiring issues or shorts in the sensor circuit, Malfunctioning transmission control module.
- 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.
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Code P0939 Description
The P0939 code indicates a problem with the hydraulic oil temperature sensor circuit being lower than the normal operating range. This sensor is responsible for monitoring the temperature of the hydraulic oil in the vehicle's transmission system. The hydraulic oil plays a crucial role in ensuring smooth operation of the transmission by providing lubrication and cooling. When the sensor detects that the oil temperature is too low, it can lead to various issues with the transmission's performance.
Common Causes of P0939
- Faulty hydraulic oil temperature sensor
- Wiring issues or shorts in the sensor circuit
- Malfunctioning transmission control module
- Low hydraulic oil levels
- Contaminated hydraulic oil
Symptoms of P0939
- Illumination of the Check Engine Light
- Transmission shifting erratically or slipping
- Reduced fuel efficiency
- Transmission overheating
- Transmission fluid leaks
How to Fix P0939
- Begin by using a scan tool to diagnose the specific cause of the P0939 code.
- Inspect the hydraulic oil temperature sensor and its wiring for any signs of damage or corrosion. Replace the sensor if necessary.
- Check the hydraulic oil levels and quality. Top up or replace the oil as needed.
- Test the transmission control module for any faults and replace if necessary.
- Clear the trouble code from the vehicle's computer and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0939
The cost of repairing a P0939 code can vary depending on the specific cause of the issue and the vehicle's make and model. On average, the repair costs for this type of problem can range from $200 to $500, including parts and labor. However, it is important to note that diagnosis time and labor rates at auto repair shops can vary significantly. It is recommended to check with local auto repair shops for more accurate estimates based on your specific circumstances.
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Code P0939 Information for Specific Makes
- P0939 Dodge — Hydraulic Oil Temperature Sensor Circuit Low
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