AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Pontiac - P2548 Pontiac

P2548 Pontiac Code - Torque Management Request Input Signal 'B'

- Code Popularity: 975 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC P2548 Pontiac?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • 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
⚠ Does your Pontiac have Safety Recalls? → Check here

How to Fix the DTC P2548 Pontiac?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for P2548 Pontiac Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2548 Pontiac code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P2548 Pontiac 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 P2548 Pontiac - Torque Management Request Input Signal 'B' - AutoCodes.com
P2548 Pontiac Code - Torque Management Request Input Signal 'B'

Need More Information on the Code?

Need more information on how to fix the P2548 Pontiac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2548 Pontiac code diagnosed by a professional: Find a repair shop in your area

Code P2548 Pontiac comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P2548 Pontiac code? Have you replaced any parts?
Any information is appreciated. Thanks