P0940 Code - Hydraulic Oil Temperature Sensor Circuit High
Quick Answer
The P0940 code indicates a problem with the hydraulic oil temperature sensor circuit in the vehicle. Common causes include Faulty hydraulic oil temperature sensor, Damaged wiring or connectors in the sensor circuit, Low transmission fluid level. 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
- P0940 indicates Hydraulic Oil Temperature Sensor Circuit High.
- Common causes
- Common causes include Faulty hydraulic oil temperature sensor, Damaged wiring or connectors in the sensor circuit, Low transmission fluid level.
- 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 P0940 Description
The P0940 code indicates a problem with the hydraulic oil temperature sensor circuit in the vehicle. The hydraulic oil temperature sensor is responsible for monitoring the temperature of the hydraulic oil in the vehicle's transmission system. When the sensor detects a high voltage signal, it triggers the P0940 code, indicating that the temperature of the hydraulic oil is too high.
Common Causes of P0940
- Faulty hydraulic oil temperature sensor
- Damaged wiring or connectors in the sensor circuit
- Low transmission fluid level
- Contaminated or degraded transmission fluid
- Issues with the transmission cooler or cooling system
Symptoms of P0940
- Check engine light illuminated on the dashboard
- Transmission slipping or delayed shifting
- Decreased fuel efficiency
- Overheating of the transmission system
- Rough or jerky shifting
How to Fix P0940
- Perform a diagnostic scan to retrieve the specific trouble code and identify the cause of the high voltage signal.
- Inspect the hydraulic oil temperature sensor and its circuit for any visible damage or corrosion.
- Test the sensor's resistance and voltage output to determine if it is functioning correctly.
- Replace the faulty hydraulic oil temperature sensor 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 P0940
The cost of repairing a P0940 code can vary depending on the specific cause of the issue and the labor rates in your area. On average, the cost of replacing a faulty hydraulic oil temperature sensor can range from $150 to $300, including parts and labor. Additional costs may apply if there are other underlying issues contributing to the high voltage signal. It's recommended to contact local auto repair shops for accurate estimates based on your vehicle make and model.
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Code P0940 Information for Specific Makes
- P0940 Dodge — Hydraulic Oil Temperature Sensor Circuit High
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