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P0736 OBD2: Reverse Incorrect Ratio

P0736 OBD2: Reverse Incorrect Ratio

The P0736 OBD-II code is related to a specific issue within the vehicle’s transmission system. This code indicates that the transmission is not shifting into reverse as it should, leading to potential complications in vehicle operation.

What Does the P0736 Code Mean?

OBD-II Code P0736 is defined as a Reverse Incorrect Ratio. This means that the Transmission Control Module (TCM) has detected that the transmission is not going into reverse gear properly, indicating a failure in achieving the correct gear ratio.

What Causes the P0736 Code?

Several factors can trigger the P0736 code, including:

  • Internal transmission failure
  • Powertrain Control Module (PCM) failure
  • Transmission Control Module (TCM) failure
  • Transmission valve body failure
  • Wiring issues

What Are the Symptoms of the P0736 Code?

Drivers may experience a few notable symptoms when this code is triggered:

  • Increased fuel consumption
  • Transmission may not shift properly

How Serious Is the P0736 Code?

The P0736 code is classified as urgent. It indicates significant malfunctions that not only affect vehicle performance but can also lead to severe damage to the transmission system or pose safety risks to the driver and passengers.

How to Diagnose the P0736 Code

Diagnosing the P0736 code involves:

  • Using an OBD-II scanner to confirm the code
  • Inspecting the transmission fluid level and condition
  • Checking for wiring issues related to the TCM
  • Testing the TCM and PCM for proper functionality
  • Examining the transmission for internal wear or damage

Common Repairs for the P0736 Code

Some common repairs that may be required to address the P0736 code include:

  • Automatic Transmission Fluid/Filter Change
  • Replacing or repairing the Transmission Control Module (TCM)
  • Addressing any internal transmission failures
  • Fixing wiring issues or short circuits

How Much Does It Cost to Fix the P0736 Code?

The cost of fixing the P0736 code can vary widely based on the underlying cause. Simple repairs like fluid changes may cost a few hundred dollars, while more complex issues such as TCM replacement can exceed a thousand dollars. Always seek an estimate from a qualified mechanic.

Can I Fix the P0736 Code Myself?

While some aspects of diagnosing and potentially fixing the P0736 code can be performed by a knowledgeable DIYer, it is essential to understand that improper repairs can lead to further complications. If you are unsure, it is recommended to consult with a professional mechanic to ensure accurate diagnosis and repair.

About JC Landry

JC is the Senior Editor at eManualOnline.com, GarageSpot.com, and Drive-My.com, as well as the Webmaster of TheMechanicDoctor.com, only to name a few. He's been a certified Master Mechanic for 15 years, working for various car dealers and specialized repair shops before turning towards blogging about cars and EVs in the hope of helping the next generation of automotive technicians. He also loves cats, Johnny Cash and Subarus.

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