[SOLVED] P1812 Code: Transmission Fluid Overtemperature – Causes And Fixes

The automobile fault code P1812 indicates a problem with the Transmission Fluid Temperature (TFT) Sensor.

This can be identified by the Engine Light or Service Engine Soon Warning Light being illuminated. The cause of this fault code could be a faulty TFT Sensor, an open or shorted TFT Sensor harness, or a poor electrical connection in the TFT Sensor circuit.

To fix this issue, it is recommended to visually inspect the wiring harness and connectors, checking for any damage or corrosion. Additionally, look for any broken, bent, pushed out, or corroded pins in the connectors. The repair time for this issue is estimated to be around 1.0 hour.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

When the engine light is on or the service engine soon warning light is illuminated, it could be a sign of the p1812 fault code.

  • The symptoms of the automobile fault code p1812 include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code p1812 can be caused by a faulty Transmission Fluid Temperature (TFT) Sensor, an open or shorted TFT Sensor harness, or a poor electrical connection in the TFT Sensor circuit.

  • The fault code P1812 can be caused by a faulty Transmission Fluid Temperature (TFT) Sensor.
  • It can also be caused by an open or shorted harness of the Transmission Fluid Temperature (TFT) Sensor.
  • Additionally, a poor electrical connection in the Transmission Fluid Temperature (TFT) Sensor circuit can also trigger this fault code.

To fix the automobile fault code p1812, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p1812, you need to follow these steps: 1.
  • Check the possible causes mentioned above.
  • 2.
  • Visually inspect the wiring harness and connectors related to the fault code.
  • 3.
  • Look for any damaged components.
  • 4.
  • Check for broken, bent, pushed out, or corroded pins in the connectors.
  • 5.
  • Repairing this fault code is estimated to take approximately 1.0 hour.

The factors influencing the cost of diagnosing and fixing the automobile fault code p1812 are the estimated repair time of 1.0 hour and the hourly rate charged by auto repair shops, which typically ranges between $75 and $150.

The P1812 fault code is related to the transmission fluid temperature in your vehicle.

When the Powertrain Control Module (PCM) detects a Transmission Fluid Temperature (TFT) Sensor input of more than 266°F, and this condition persists for over 6 minutes and 48 seconds, the P1812 code is triggered. This code indicates that the transmission fluid has become overheated.

When the P1812 code appears, it is important to address the issue promptly. Overheated transmission fluid can lead to various problems, including reduced transmission performance and potential damage to internal components. To resolve this issue, it is recommended to have the transmission fluid checked and serviced by a qualified technician.

They will be able to diagnose the cause of the overheating and take the necessary steps to fix the problem, ensuring the smooth operation and longevity of your vehicle’s transmission.

What are the possible causes for the automobile fault code p1812 and how can I visually inspect them?

If you’re seeing the engine light on or the service engine soon warning light, the fault code P1812 might be the culprit. This code is often caused by a faulty transmission fluid temperature (TFT) sensor, an open or shorted TFT sensor harness, or a poor electrical connection in the TFT sensor circuit. To visually inspect these possible causes, check the wiring harness and connectors related to the TFT sensor. Look for any damaged components and examine the connector’s pins for any signs of being broken, bent, pushed out, or corroded.

How can a faulty Transmission Fluid Temperature (TFT) Sensor affect the engine light and what steps can I take to fix it?

If you notice the engine light or service engine soon warning light is on, it could be due to a faulty Transmission Fluid Temperature (TFT) Sensor. This can happen if the TFT sensor harness is open or shorted, or if there is a poor electrical connection in the TFT sensor circuit. To fix this issue, you should visually inspect the wiring harness and connectors, checking for any damage or broken pins. It’s important to address these possible causes to resolve the problem.

What should I look for when inspecting the wiring harness and connectors related to the Transmission Fluid Temperature (TFT) Sensor for the p1812 fault code?

When inspecting the wiring harness and connectors related to the Transmission Fluid Temperature (TFT) Sensor for the p1812 fault code, there are a few things to look out for. Visually inspect the wiring harness and connectors for any signs of damage. Check for broken, bent, pushed out, or corroded connector pins. These issues can cause a poor electrical connection or an open/short circuit. By checking and addressing these possible causes, you can fix the fault code and prevent further issues.

p1812 error fault code explained

If your engine light is on and you’re experiencing issues with your transmission, it could be due to a faulty Transmission Fluid Temperature (TFT) Sensor. To fix this, visually inspect the wiring harness and connectors for any damage.

Check for broken, bent, pushed out, or corroded connector pins.

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