P2639 Chrysler 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 Chrysler 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 Chrysler 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 Chrysler?
- 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 Chrysler?
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 Chrysler 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 Chrysler code?
Need more information on how to fix the P2639 Chrysler code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2639 Chrysler code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P2639 Chrysler Code
1. What does the OBDII code P2639 mean for a Chrysler vehicle?
P2639 indicates that the Powertrain Control Module (PCM) has detected a low voltage or improper signal from the Torque Management Feedback Signal 'A' circuit.
2. What are the common symptoms of the P2639 code in Chrysler vehicles?
Symptoms may include reduced engine performance, poor acceleration, transmission shifting issues, or the Check Engine Light being illuminated.
3. What causes the P2639 code to appear on a Chrysler?
Common causes include a faulty torque management control module, damaged wiring or connectors, a failing PCM, or low system voltage.
4. Can I drive my Chrysler with the P2639 code active?
Driving with this code may lead to reduced performance and potential damage to the drivetrain. It’s best to address the issue promptly.
5. How do you diagnose the P2639 code on a Chrysler?
Diagnosis involves checking for damaged or corroded wiring, testing the torque management sensor, verifying proper power and ground connections, and inspecting the PCM for faults.
6. What repairs can fix the P2639 code in a Chrysler?
Repairs may include replacing damaged wiring, repairing or replacing the torque management module, updating or reprogramming the PCM, or fixing voltage supply issues.
7. How much does it cost to fix the P2639 code on a Chrysler?
The cost can vary depending on the exact issue but typically ranges from $100 to $500, including diagnostics and parts.
8. Can a weak battery cause the P2639 code on a Chrysler?
Yes, a weak or failing battery may lead to low system voltage, which could trigger this code.
9. Does the P2639 code affect fuel efficiency in a Chrysler?
Yes, the code can lead to reduced fuel efficiency due to improper engine torque management.
10. Is P2639 a common issue in Chrysler vehicles?
P2639 is not extremely common but can occur, particularly in older vehicles or those with electrical or module-related issues.
Discuss the causes and fixes for P2639 Chrysler OBDII Code
Code P2639 Chrysler 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.
