Guide To P0939 OBD Error Code Solutions

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You may find the P0939 code flashing, this is a generic OBD-II code, and requires some diagnosis to clear. This error is set when the Transmission Control Module or TCM notices an unacceptable signal from the Hydraulic Oil Temperature Sensor.

The gears of the vehicle shift when the clutch uses hydraulic pressure to engage and disengage the it. The Transmission Control Module comes manages the Hydraulic Oil Temperature Sensor, when it tells the TCM the temperature and the signal is not acceptable the TCM will proceed to set P0939 code.

What causes this problem with the Hydraulic Oil Temperature Sensor Circuit Low?

• Problem with the Hydraulic Oil Temperature Sensor
• The harness of the Hydraulic Oil Temperature Sensor is open or shorted
• The circuit of the Hydraulic Oil Temperature Sensor shows poor electrical connection
• Failed Transmission Control Module (TCM)

1. Hydraulic Oil Temperature Sensor - Try to fix the issue and see if the P0939 code return, accordingly you will have to replace it. 
2. Hydraulic Oil Temperature Sensor Harness - The harness may have damages, try to repair them if possible, otherwise go for a replacement.
3. Transmission Control Module (TCM) - You can find the perfect TCM for your vehicle on Parts Avatar. You can order Online from the comfort of your home, we stock a wide range of products to suit the compatibility needs of different makes and models.
4. Powertrain Control Module - You may have to replace the PCM module if repairs don’t clear P0939 code. Order online easily at Parts Avatar and have it delivered right to your doorstep.
5. Diagnostic Tools - Find the best diagnostic tools to conduct diagnosis for your vehicle. You can purchase from a wide range of brands from us. Order Online easily from the comfort of your home and have it delivered to you anywhere in Canada.
6. Automatic Transmission Module - Try to repair and see if the P0939 code returns, if it does, then you will have to replace it. Buy from Parts Avatar and get free shipping on orders over CAD $99.
7. Engine Control Module - You can easily replace the ECM module. Opt for the best from brands available at Parts Avatar. We ship across Canada in just a matter of days with no cross border shipping charges or delays!

Willing to know some common symptoms of OBD Code P0939? Your wish is our demand. Have a look at them below:

Common Symptom

• Check Engine Light is On
• Difficulty in gear shifting
• Transmission issues

We have listed out some ways which would help you to correct the occurrence of OBD Code P0939. They are mentioned here as follows:

• Repair or replace the TCM
• Repair or replace the damaged wires
• Repair or replace the Hydraulic Oil Temperature Sensor
• Repair or replace the

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of Hydraulic Oil Temperature Sensor, Hydraulic Oil Temperature Sensor Harness, Transmission Control Module (TCM) and many more. Now all your problems would vanish within no time.

Get hold of your OBD scanner and connect it to the diagnostic port of your vehicle to retrieve all the codes stored. If there are codes present before the P0939 code then you will have to troubleshoot them before starting diagnosis on this issues. There are chances that it got set due to the other codes that were set. Once you have fixed them, clear the codes and see if it returns.

If it doesn’t then it was probably these other codes that were the reason for the problem. However, if the code returns then you have to first start by inspecting the wiring and connectors. Repair all the damaged wires, that may be broken, burned, corroded etc. You may also need to replace some parts if they’re beyond repair. Once you have sorted all the wiring issues, go ahead and clear the code and take your vehicle on a test drive to see if the code resets. Of it doesn’t then you may be having an intermittent condition, which may have to worsen before correct diagnosis can be made.

Upon test drive, if you note that the code has set again, then continue checking the Hydraulic Oil Temperature Sensor, or the TCM. Accordingly you can opt for repairs or replacements. You may require help in the diagnosis, so don’t worry, you can approach a trained mechanic for it.

Common Mistakes When Diagnosing the P0939 Code

• Failure of the Hydraulic Oil Temperature Sensor
• Transmission Control Module (TCM) Fails
• Wiring problems