How to Fix the 59 Code on Your Chevy Spark

Code 59 on the Chevrolet Spark indicates a temperature sensor circuit problem with the transmission fluid. The ECM controls the temperature sensor for the transmission fluid, which shows code 59 when the circuit is open.

In this article, I will describe the major causes and eventually tell you the solutions to the Code 59 that appears on your Chevrolet Spark. Therefore, keep reading the article on what does 59 code means on Chevy Spark and how to fix it to learn more.

59 Code on Chevy Spark
59 Chevy Spark

Chevy Spark 59 Code Explanation

Before one can fix a problem, it must be precisely identified. This is standard practice, and there is nothing exceptional about this circumstance. First, you should become familiar with the Chevrolet Spark error code 59.

The Chevrolet Spark code 59 means that there is a problem with the transmission fluid temperature sensor circuit. The ECM (Engine Control Module) checks the temperature sensor for the transmission fluid to change how the transmission works.

When the transmission fluid is cold, the sensor resistance is high, and the PCM will receive a high signal voltage.

Normal transmission working temperature is 100°C (212°F), and when the temperature of the transmission fluid rises, the sensor resistance drops and the voltage also drops by roughly 1.5 to 2.0 volts.

Transmissions will operate at a warm value when DTC 59 is set, although the scan tool will show the real fluid temperature. If the temperature of the transmission fluid stays below -33°C (-27°F) for 1 second, the computer will record a diagnostic problem code (DTC) 59.

The temperature sensor for the transmission fluid has found a problem and sent a warning message with code 59. The engine control module (ECM) found problems with the sensors, which are often caused by high voltage output.

Later in this article, when we talk about the fix, we will provide you with additional details regarding this code and its causes. Details of the 59 error code are as follows:

  • 59-Problem with the temperature sensor circuit of transmission fluid (high voltage)

How Serious Is 59 Code on Chevy Spark?

Depending on what caused Code 59 in the first place, the consequence of the error could be severe or less severe.

If the temperature sensor is functioning normally, you have a problem with an overheating transmission, which needs to be fixed as soon as possible. But if the sensor is defective, it is likely that the transmission is fine and does not need any work.

Nevertheless, you should get the error code 59 on the Chevrolet Spark fixed without any delay.

Causes of 59 Code on Chevy Spark

There are several potential reasons why a 59 code would be generated. The severity of each of them varies from case to case. 

The engine control module (ECM) of the vehicle keeps an eye on the sensor and adjusts the temperatures of the fluids as needed. The error code will occur if the sensor is found to be open.

But you should be careful with this code because ignoring it could lead to expensive repairs. Possible explanations for this include the following:

  • The defective temperature sensor of the transmission.
  • Transmission failure or slippage.
  • Wiring problems of sensors.
  • Low transmission fluid which results from the leaks.
  • TCM (Transmission Control Module) and/or ECM (Engine Control Module) failure.
  • Dirty transmission fluid.

Symptoms of 59 Code on Chevy Spark

If your Chevy Spark gets the code 59, it will show a few signs that something is wrong. The majority of the time, the symptoms are so mild that you probably will not notice them all at once.

However, the following symptoms may be present in certain instances due to this code:

  • When this error code appears, shifting can be problematic.
  • The check engine light may also illuminate on your dashboard.
  • If the low transmission fluid due to a leak is the reason for the code, there will undoubtedly be visible smoke.
  • “Limp mode” may activate, which is a set of driving conditions that are meant to get a car to a repair shop with as little damage as possible to its main parts.
  • Due to the low fluid level, the sound of cogs rotating and an audible “howl” will be heard during acceleration.

Solution of 59 Code on Chevy Spark

Now let’s examine Chevrolet Spark error code 59 repair techniques. To take the right steps to fix the problem with the temperature sensor circuit of transmission fluid, it will be important to figure out what the exact problem is.

A diagnostics check can help to define an area that is exhibiting abnormal behavior and identify the location of a potential issue in the system. This aids in identifying problems before they cause serious damage.

Here are the actions you should take to diagnose the 59 error:

  • First, make sure the transmission fluid is full and in good condition before doing anything else.
  • Check the wires and connections that connect with the transmission fluid temperature sensor if you do not detect any issues.
  • If a volt meter is available, check the TFT sensor to see if there are any problems with it.

You can get rid of the 59 code from your Chevrolet Spark car in two ways.

First, you can fix the transmission fluid temperature sensor circuit by fixing what is causing the problem. You can do this by using the above diagnostic methods.

Another option is to just replace the transmission fluid temperature sensor circuit with a new one. 

Here are some sequential steps you can try to repair the transmission fluid temperature sensor circuit:

  • Transmission fluid and leaks can both be checked visually to determine whether or not they exist. If the fluid level is low, you must refill it. Then, reset the error code, and wait for it to return.
  • Fix any leaks you can see, replace the fluid, clear the error code, and keep an eye on the car in case it comes back.
  • Once you have confirmed there are no leaks and enough fluid levels, it is time to check the temperature sensor for any signs of damage. If any kind of fault or damage is found, replace or repair it as necessary. If the PCM recognizes the low signal voltage (high temperature) and the scan shows 154°C (309°F) or higher, the PCM and wiring are in good condition.
  • If the error code continues to be shown and the transmission does not begin to function normally again, it is possible that it is time to replace the transmission.

Just follow the steps below to replace the temperature sensor circuit of transmission fluid on your own:

  • The first step is to remove the plugs from the engine compartment.
  • Then, take off the cover of the transmission and empty the radiator. You will also have to discharge the fluid from the transmission.
  • To disconnect the sensor, you have to remove the bolts from the valve body cover.
  • Lastly, replace the temperature sensor circuit as needed.

Cost to Fix the Chevy Spark 59 Code

For a new part, you should expect that it will cost anywhere from $12 to $44 to buy it.

If you want a mechanic or service expert to do the replacement for you, it will cost you an extra $50 to $143.

This price range does not account for taxes or additional costs. The expenditures can be predicted by using car ownership surveys and average vehicle age.

The Fair Price Estimator can help you determine if you are getting a good deal on a new Chevrolet Spark in your area.

Frequently Asked Questions (FAQs)

What is a transmission fluid temperature sensor? 

The transmission fluid temperature sensor is a thermistor that controls the signal voltage sent to the PCM. It is part of the fluid pressure switch assembly.
It sends a voltage signal to the ECU that lets the engine control module check the temperature of the automatic transmission fluid.

What is the function of the transmission fluid temperature sensor? 

The Transmission Fluid Temperature Sensor (TFT) can detect the transmission fluid’s temperature.
It signals to the control module how to change the shift patterns for smoother shifting in automatic transmissions and to lock the torque converter if the engine gets too hot.

What is the lifespan of a Chevy Spark?

Though compact in size, the Spark has a high maximum lifetime mileage of 150,000 miles with proper care and maintenance. With regular servicing, a Chevrolet Spark can survive for up to a decade.

What is the most common mistake made while diagnosing code 59? 

When attempting to diagnose a 59 DTC, it is common practice to disregard the transmission’s fluid and any leaks or damage it may have sustained.

Conclusion

After reading this article, even if the 59 error code appears on your car’s display, you should not worry. You have to simply follow the procedure described in this article about what does 59 code means on Chevy Spark and how to fix it.

If you continue to experience difficulties after attempting the above-mentioned steps, it is recommended that you should get professional assistance for the difficult adjustments.

There are numerous potential causes for this, so a professional may be required to determine what is going on. Describe what occurs when the code is set, including when and how the shift changes, additional warning lights, and strange sounds.

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