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P0712 OBD2: Transmission Fluid Temperature Sensor "A" Circuit Low

P0712 OBD2: Transmission Fluid Temperature Sensor “A” Circuit Low

What Does the P0712 Code Mean?

OBD-II Code P0712 is defined as a Transmission Fluid Temperature Sensor “A” Circuit Low. The Transmission Fluid Temperature Sensor is responsible for sending the temperature of the transmission fluid to the engine control module (PCM). When the PCM identifies an incorrect signal from this sensor, it sets the P0712 code.

What Causes the P0712 Code?

There are several potential causes for the P0712 code, including:

  • Failure of the Transmission Fluid Temperature Sensor
  • Wiring issues affecting the sensor signal
  • Malfunctioning Powertrain Control Module (PCM)
  • Malfunctioning Transmission Control Module (TCM)

What Are the Symptoms of the P0712 Code?

Common symptoms associated with the P0712 code include:

  • Transmission may not shift properly
  • Transmission temperature warning light illuminated on the instrument cluster

How Serious Is the P0712 Code?

The P0712 code is considered urgent, as it indicates a significant malfunction that can lead to severe damage to the vehicle. Ignoring this code may result in poor transmission performance, which can compromise vehicle safety and functionality.

How to Diagnose the P0712 Code

To accurately diagnose the P0712 code, a mechanic should follow these steps:

  1. Use an OBD-II scanner to confirm the presence of the P0712 code and check for any additional codes.
  2. Inspect the wiring and connectors related to the Transmission Fluid Temperature Sensor for damage or corrosion.
  3. Test the Transmission Fluid Temperature Sensor using a multimeter to ensure it is functioning within specifications.
  4. Check the PCM and TCM to rule out any failures.

Common Repairs for the P0712 Code

Repairs for the P0712 code may include:

  • Replacing the Transmission Fluid Temperature Sensor
  • Repairing or replacing damaged wiring or connectors
  • Reprogramming or replacing the PCM or TCM if necessary

How Much Does It Cost to Fix the P0712 Code?

The cost to repair the P0712 code can vary widely depending on the underlying issue. On average, you can expect to pay between $100 to $300 for sensor replacement, while more extensive repairs involving the PCM or TCM may cost significantly more.

Can I Fix the P0712 Code Myself?

If you have experience with automotive repairs and the necessary tools, you may be able to address the P0712 code yourself. However, it’s crucial to properly diagnose the issue to avoid unnecessary repairs. If you’re unsure, it’s advisable to seek professional help to ensure the problem is resolved effectively.

About JC Landry

JC spent 15+ years as a certified Master Mechanic before trading the shop for the keyboard. He's worked across dealerships, owned and operated his own independent garage, and consulted on automotive trade school curricula, reviewing technical textbooks used in vocational programs. He now serves as Editor-in-Chief at eManualOnline.com, where he oversees the platform's technical content. He's one of the few voices in automotive publishing who has actually turned wrenches professionally on the vehicles he covers. He didn't learn automotive repair to write about it. He learned to write after spending over a decade doing it.

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