[SOLVED] P2639 Code: Low Torque Feedback Signal – How To Fix

The P2639 automobile fault code is a common issue that triggers the Engine Light ON or Service Engine Soon Warning Light. This code is caused by a faulty Engine Control Module (ECM), Transmission Control Module (TCM), or poor electrical connection.

The importance of repairing this issue lies in the fact that it can lead to further damage to the vehicle’s engine or transmission. The repair difficulty is moderate, with a repair time of 1.0.

To fix this issue, one must visually inspect the related wiring harness and connectors, check for damaged components, and look for broken, bent, pushed out, or corroded connector’s pins.

It is crucial to check the “Possible Causes” listed above to interpret the fault code correctly.

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

If you notice the Engine Light ON (or Service Engine Soon Warning Light), it could be due to the p2639 fault code.

Here are the symptoms to look out for:

  • The P2639 fault code in an automobile can cause several symptoms, including the engine light turning on or the service engine soon warning light appearing.
  • Other symptoms may include a decrease in engine power, reduced fuel efficiency, and difficulty starting the engine.
  • Additionally, the vehicle may experience rough idling or stalling, and there may be a noticeable decrease in acceleration.
  • It is important to address these symptoms promptly to prevent further damage to the vehicle and ensure safe driving conditions.

The automobile fault code p2639 can be caused by various factors, including faulty modules and poor electrical connections.

  • The automobile fault code P2639 can be caused by a faulty Engine Control Module (ECM).
  • It can also be caused by a faulty Transmission Control Module (TCM).
  • Another cause of this fault code is an outdated Engine Control Module (ECM) software or Transmission Control Module (TCM) software.
  • An open or shorted Engine Control Module (ECM) harness can also cause this fault code.
  • Lastly, a poor electrical connection in the Engine Control Module (ECM) circuit can also be a cause of the P2639 fault code.

To fix the p2639 fault code, check the possible causes and inspect the wiring harness and connectors for any damage or corrosion.

  • To fix the automobile fault code p2639, you need to check the possible causes listed above.
  • Visually inspect the related wiring harness and connectors for any damage.
  • Look for broken, bent, pushed out, or corroded connector’s pins.
  • This fix will take an estimated repair time of 1.0 hour.

The automobile fault code P2639 can be diagnosed and fixed within an estimated repair time of 1.0 hour. The cost of repair is influenced by the repair time, which is commonly charged between $75 and $150 per hour by most auto repair shops. Therefore, the total cost of fixing the P2639 fault code will depend on the hourly rate charged by the repair shop and the estimated repair time required to fix the issue.

The P2639 code is related to the transmission control module (TCM) and engine control module (ECM).

It occurs when the TCM requests a reduction in engine torque during shift events, but the ECM is unable to comply with the request. The ECM responds by retarding the base ignition timing and notifying the TCM that the request has failed. This fault code is set when the TCM receives a torque reduction failure message from the ECM.

It is important to note that a fault in the controller area network (CAN) will not cause this code to be set.

What are the possible causes of the automobile fault code P2639?

If you see the engine light on or service engine soon warning light, it could be due to the P2639 fault code. This code can be caused by a faulty Engine Control Module (ECM), Transmission Control Module (TCM), or poor electrical connection in the ECM circuit. It can also be caused by outdated software in the ECM or TCM. To fix this issue, you should visually inspect the wiring harness and connectors for any damage or corrosion. Additionally, check for broken, bent, or pushed out connector pins.

How can I fix the P2639 fault code in my automobile?

If you’re experiencing the P2639 fault code in your automobile, which is indicated by the Engine Light ON or Service Engine Soon Warning Light, it could be due to a faulty Engine Control Module (ECM), Transmission Control Module (TCM), or poor electrical connection. To fix it, check the possible causes listed above, visually inspect the related wiring harness and connectors, and look for damaged components or broken, bent, pushed out, or corroded connector’s pins.

What should I visually inspect to troubleshoot the P2639 fault code?

If you’re troubleshooting the P2639 fault code, start by checking for an illuminated Engine Light or Service Engine Soon Warning Light. The possible causes include a faulty Engine Control Module (ECM) or Transmission Control Module (TCM), software updates for either module, an open or shorted ECM harness, or poor electrical connections. To fix the issue, visually inspect the wiring harness and connectors for damage, broken or bent pins, or corrosion.

p2639 error fault code explained

If your engine light is on, it could be due to a faulty Engine Control Module (ECM) or Transmission Control Module (TCM), or issues with their software or wiring.

Visually inspect the wiring harness and connectors for damage, and check for broken, bent, pushed out, or corroded connector pins.

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