AutoCodes – Ford – P2549 Ford

P2549 Ford Code - Torque Management Request Input Signal 'B' Range/Performance

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: P2549 Ford indicates Torque Management Request Input Signal 'B' Range/Performance.
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.

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Code Popularity 1,458

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 18, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2549 Ford Description

To improve shift feel, the Transmission Control Module (TCM) may request that the Engine Control Module (ECM) reduce engine torque during shift events. When such a request is received, the ECM responds by retarding the base ignition timing and notifying the TCM that the request has succeeded. If the ECM is unable to comply with the request, the ECM sends the TCM a message that the request has failed.
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.

OBDII Code P2549 Ford - Torque Management Request Input Signal 'B' Range/Performance - AutoCodes.com — P2549 Ford Code - Torque Management Request Input Signal 'B' Range/Performance

What does this mean?

What are the Possible Causes of the DTC P2549 Ford?

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 P2549 Ford?

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 P2549 Ford 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2549 Ford Code

1. What are the common symptoms of OBDII code P2549 in a Ford vehicle?

- Common symptoms include reduced engine performance, rough idling, and potential stalling of the vehicle.

2. What does the OBDII code P2549 in a Ford indicate?

- The code indicates a torque management request input signal 'B' range/performance issue.

3. What are some possible causes of OBDII code P2549 in a Ford?

- Potential causes include a faulty throttle position sensor, issues with the transmission control module, or wiring/connectivity issues.

4. How can I diagnose the source of OBDII code P2549 in my Ford vehicle?

- Diagnosing the issue typically involves conducting a thorough inspection of the throttle position sensor, checking the transmission control module, and testing the wiring for any faults.

5. Can driving with OBDII code P2549 present cause further damage to my Ford vehicle?

- Continuing to drive with this code present can potentially lead to reduced fuel efficiency, further engine performance issues, and even potential damage to other components.

6. How can I repair OBDII code P2549 in my Ford vehicle?

- Repairing the code usually involves replacing the faulty throttle position sensor, addressing any transmission control module issues, and fixing any wiring or connectivity problems.

7. Is it safe to continue driving my Ford with the OBDII code P2549 illuminated?

- It is generally not recommended to continue driving with this code illuminated, as it can affect the vehicle's performance and potentially cause further issues.

8. Can I reset the OBDII code P2549 in my Ford using a diagnostic tool?

- Yes, a diagnostic tool can be used to reset the code after the underlying issue has been diagnosed and repaired.

9. Will OBDII code P2549 cause my Ford vehicle to fail an emissions test?

- Yes, if this code is present during an emissions test, it can cause the vehicle to fail due to emissions-related issues.

10. How can I prevent OBDII code P2549 from reoccurring in my Ford vehicle?

- Regular maintenance, such as keeping the throttle position sensor and transmission control module in good condition, can help prevent this code from reoccurring.