P0937 Fault Code

Hydraulic Oil Temperature Sensor Circuit

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0937 fault code indicates an issue with the Hydraulic Oil Temperature Sensor Circuit in vehicles. This sensor plays a crucial role in monitoring the temperature of the hydraulic oil used in transmission systems. An appropriate temperature reading is vital for optimal transmission performance and to prevent overheating, which could lead to severe damage.

What are the symptoms of the P0937 code?

When a P0937 code is triggered, drivers may notice:

• Erratic or poor transmission shifting.
• Transmission overheating warnings or symptoms.
• Illuminated check engine light on the dashboard.
• Unusual noises or delay in transmission engagement.
• Decreased overall vehicle performance, especially during acceleration.

What causes the P0937 code?

The primary causes of a P0937 code can include:

• Faulty hydraulic oil temperature sensor: The sensor itself may be malfunctioning or damaged.
• Electrical issues: Problems such as short circuits, open circuits, or damaged wiring can disrupt the sensor's readings.
• Fluid level or quality problems: Low or contaminated hydraulic fluid can affect the sensor's performance.
• Transmission overheating: An overheated transmission can also lead to improper sensor readings.

How to fix P0937?

To resolve a P0937 fault code, the following steps should be taken:

• Inspect the hydraulic oil temperature sensor for signs of damage or wear and replace if necessary.
• Check the wiring and connectors for any signs of corrosion, fraying, or disconnections and repair or replace as needed.
• Ensure that the hydraulic fluid is at the correct level and is clean. Flush and refill if the fluid is contaminated.
• Reset the engine control module (ECM) to clear the fault code and test drive the vehicle to see if the code returns after repairs.