P2639 Dodge Code - Torque Management Feedback Signal 'A' Low
Quick Answer
To improve shift feel, the Transmission Control Module (TCM) may request that the Engine Control Module (ECM) reduce engine torque during shift events. Common causes include Faulty Engine Control Module (ECM), Faulty Transmission Control Module (TCM), Engine Control Module (ECM) software update. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P2639 Dodge indicates Torque Management Feedback Signal 'A' Low.
- Common causes
- Common causes include Faulty Engine Control Module (ECM), Faulty Transmission Control Module (TCM), Engine Control Module (ECM) software update.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P2639 Dodge Description
The torque reduction request is sent to the ECM through a communication network called the controller area network (CAN). Two circuits are used to communicate CAN data between the ECM and TCM.
A fault in the CAN will not cause the ECM to set the Diagnostic Trouble Codes (DTC). If a CAN fault occurs, other DTCs will set before this code.
The ECM set the OBDII code when the TCM receives a torque reduction failure message from the ECM.
What are the Possible Causes of the DTC P2639 Dodge?
- Faulty Engine Control Module (ECM)
- Faulty Transmission Control Module (TCM)
- Engine Control Module (ECM) software update
- Transmission Control Module (TCM) software update
- Engine Control Module (ECM) harness is open or shorted
- Engine Control Module (ECM) circuit poor electrical connection
How to Fix the DTC P2639 Dodge?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2639 Dodge code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P2639 Dodge code?
Need more information on how to fix the P2639 Dodge code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2639 Dodge code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P2639 Dodge Code
1. What does the OBDII code P2639 mean for a Dodge vehicle?
P2639 indicates that the torque management feedback signal 'A' is reading as low, which suggests an issue with the communication between the engine control module (ECM) and other systems regulating engine torque.
2. What are the common symptoms of code P2639 in a Dodge?
Symptoms may include reduced engine performance, poor acceleration, potential limp mode activation, and a lit check engine light.
3. What causes code P2639 in a Dodge?
Common causes include a faulty torque management sensor, damaged wiring or connectors, issues with the ECM, or electrical interference in the circuit.
4. Can code P2639 cause serious damage to my Dodge if ignored?
While it may not cause immediate damage, ignoring the issue can lead to further drivability problems and potentially damage other components if the torque management system remains compromised.
5. How can I diagnose the P2639 code on my Dodge?
Start by using an OBDII scanner to confirm the code, inspect the torque management sensor and its wiring for damage or loose connections, and check for any related codes that might point to a specific issue.
6. What repairs can fix the P2639 code on a Dodge?
Repairs may include replacing a faulty torque management sensor, repairing or replacing damaged wiring or connectors, updating or reprogramming the ECM, or addressing any grounding issues.
7. Is it safe to drive my Dodge with the P2639 code?
Driving with this code may be safe in the short term, but it could result in poor performance and put additional strain on the engine, so it’s best to address it promptly.
8. How much does it typically cost to fix code P2639 on a Dodge?
Repair costs can range from $100 to $500 or more, depending on whether parts like the torque management sensor or ECM need replacement and the extent of diagnostic labor.
9. Can a failing ECM cause the P2639 code on a Dodge?
Yes, a malfunctioning ECM can fail to properly interpret torque management feedback, leading to this code being triggered.
10. How can I prevent code P2639 from occurring again on my Dodge?
Routine maintenance, inspecting wiring and connectors for damage, and addressing drivability issues early can help prevent this code from recurring.
Discuss the causes and fixes for P2639 Dodge OBDII Code
Code P2639 Dodge comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
