P0736 code — how to fix error fast

Facing transmission-related OBD2 codes is certainly worrying for most drivers, but getting the code P0736 can be even more so. It’s one of the most specific codes related to the transmission system and it gets difficult to get to the bottom of it and fix it on time.

If you are like most drivers, you’ll probably find our guide on P0736 code meaning useful as we dig deep into the potential causes of the code and give you some pointers on diagnosing it. We’ll also be discussing the main steps you can take to fix the code and prevent it in the future, so let’s get straight to it.

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What does the P0736 code mean?

The P0736 code is related to the transmission system and refers to an issue with the reverse gear ratio. When this code appears, it means that the transmission is not shifting correctly or smoothly between gears.

To put it simply, this code in particular can mean difficulties shifting into the reverse gear or delayed shifting into the reverse gear. Either way, it makes a bothersome feat to try and fix the code once it starts to affect your vehicle so much that you can’t drive in reverse, which is especially annoying when parking your car.

Some of the common symptoms of this code include difficulty shifting gears, decreased fuel efficiency, and the illumination of the check engine light. Ignoring this code can lead to more severe issues with the transmission, including total failure.

What causes the P0736 code?

While this OBD2 code is pretty specific and exclusively indicates an issue with the reverse gear shifting, there could be several potential causes behind it. To properly fix the code, you’ll need to determine the right one that’s triggering the code in your car and do what you can to repair it. Here’s a total list of possible reasons behind the code to serve as a guide:

Low transmission fluid levels

Low transmission fluid levels can cause a range of issues with the transmission, including the P0736 code. When the fluid levels are low, it can cause the gears to slip or not engage correctly. This can lead to the transmission not shifting properly and ultimately trigger the P0736 code.

Faulty sensors

The sensors in the transmission system are responsible for sending signals to the onboard computer about the transmission’s performance. If any of these sensors are faulty, it can cause the computer to receive incorrect data, leading to the code.

Damaged wiring

The wiring in the transmission system can become damaged over time, leading to incorrect signals being sent to the onboard computer. Damaged wiring can also cause issues with the sensors in the transmission system.

Internal transmission damage

Internal transmission damage is the most severe potential cause of the P0736 code. This can be caused by a range of issues, including wear and tear, overheating, or improper maintenance. In this case, significant repairs or replacement may be necessary.

Which car models does the P0736 code affect the most?

While the P0736 code can appear on any vehicle, there are some car models that are more prone to experiencing this issue. These models include the following ones:

• Kia Sportage: This model has been known to experience transmission problems, including issues with the reverse gear and especially in the 2005 to 2010 generation model.
• Ford Windstar: This minivan has a history of transmission issues, including slipping and shifting problems. The P0736 code is one of the codes that may be triggered when there is a problem with the reverse gear.
• Nissan Titan:: Some owners of this pickup truck have reported issues with the transmission, including problems with the reverse gear.

How to diagnose the P0736 code

Diagnosing the P0736 code is easier said than done, and it often requires you to use specialized tools and equipment to sort out the issues with the code. So, we can give you a few hints regarding the most commonly-used diagnostic methods to determine the issue behind the code:

Check transmission fluid levels

The first step in diagnosing the P0736 code is to check the transmission fluid level. If the fluid level is low, topping up the fluid may solve the issue.

Check transmission sensors

If the fluid levels are normal, the next step is to check the transmission sensors. This can be done using a diagnostic tool that can read the onboard computer’s signals.

Check wiring

If the sensors are functioning correctly, the next step is to check the wiring in the transmission system. A visual inspection of the wiring can help identify any damage that may be causing the issue.

Perform transmission system tests

If none of the above steps identify the issue, more in-depth tests may be necessary. These tests can include a road test, a stall test, or a pressure test, which can help identify the root cause of the code.

How to fix the P0736 code

Once the root cause of the P0736 code has been identified, repairs can be made. Here are some potential fixes for each of the potential causes of the code:

Top up the low transmission fluid

In case the code has been triggered by dirty or low transmission fluid levels, replacing the fluid and filter can sometimes resolve the issue. You can either top up the fluid or simply flush the transmission fluid and replace it with completely new fluid to fix the problem.

Replace faulty sensors

The P0736 code can also be triggered by electrical issues or problems with transmission sensors. Repairing or replacing damaged sensors can sometimes resolve the issue.

Repair damaged wiring

If the wiring is damaged, it will need to be repaired or replaced to ensure that the signals are being sent correctly. This mostly has to do with the wiring system connected with the associated sensors, so you can check the wiring while you are at it when examining the sensors.

Fix internal transmission damage

If the transmission has sustained internal damage, significant repairs or replacement may be necessary. This can be an expensive fix, so it’s essential to seek professional help if this is the case. You should have an experienced mechanic take a look at your transmission system and look for faulty components, which at least may help you prevent having to do a complete rebuild.

How to prevent the P0736 code

While some causes of the code are inevitable, there are steps that you can take to prevent this issue from occurring. Here are some preventative measures:

• Regularly inspect the transmission fluid level
• Repair faulty transmission components like solenoids and relays
• Avoid shifting through the gears too rough
• Avoid overheating the transmission

If you apply any of these steps, or better yet all of them, you should be able to avoid having to deal with this issue ever again.

Our take

Overall, the code P0736 can appear in almost every vehicle but it mostly affects cars with an automatic gearbox. So, you can simply rely on the steps listed in this guide to diagnose, repair, and clear the code while taking the necessary precaution to ensure it never happens again.