P2644 Chrysler Code - Torque Management Feedback Signal 'B' High
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
- P2644 Chrysler indicates Torque Management Feedback Signal 'B' High.
- 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 P2644 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 P2644 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 P2644 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 P2644 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.
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Frequently Asked Questions about P2644 Chrysler Code
1. What are the common symptoms of OBDII code P2644 in a Chrysler vehicle?
- Common symptoms include rough idling, loss of power, engine stalling, and the illumination of the check engine light.
2. What does the OBDII code P2644 Chrysler indicate?
- The code P2644 indicates an issue with the Torque Management Feedback Signal 'B' being detected as too high by the engine control module.
3. What are the possible causes of OBDII code P2644 in a Chrysler vehicle?
- Possible causes include a faulty oil control valve, wiring issues, low engine oil level, or a malfunctioning engine control module.
4. How can I diagnose the OBDII code P2644 in my Chrysler vehicle?
- Diagnosis typically involves checking the oil level, inspecting the oil control valve and its wiring, and using a scan tool to monitor the feedback signal.
5. Can I continue driving my Chrysler with the OBDII code P2644 present?
- It is not recommended to drive your vehicle with this code present, as it can lead to further engine damage or performance issues.
6. How can I repair OBDII code P2644 in a Chrysler vehicle?
- Repair involves addressing the root cause, such as replacing the faulty oil control valve, repairing any wiring issues, or resetting the engine control module.
7. Is it safe to reset the check engine light after repairing OBDII code P2644 in a Chrysler?
- Yes, once the issue has been resolved, you can safely reset the check engine light using an OBDII scan tool.
8. Can low engine oil level trigger OBDII code P2644 in a Chrysler vehicle?
- Yes, low engine oil level can lead to improper oil pressure, which may trigger the Torque Management Feedback Signal 'B' high code.
9. How long does it take to repair OBDII code P2644 in a Chrysler vehicle?
- The repair time can vary depending on the cause of the issue, but it typically takes a few hours to diagnose and fix the problem.
10. Will OBDII code P2644 affect the overall performance of my Chrysler vehicle?
- Yes, this code can impact the engine's performance, leading to rough idling, decreased power, and potential engine stalling if left unresolved.
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