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P2551 DODGE

P2551 DODGE - Torque Management Request Input Signal 'B' High

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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P2551 DODGE Possible 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

First diagnose P2551 DODGE code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.

Cost of diagnosing the P2551 DODGE code

    Labor: 1.0

    The cost of diagnosing the P2551 DODGE code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

P2551 DODGE Possible Symptoms

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

P2551 Dodge 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 P2551 Dodge - Torque Management Request Input Signal 'B' High - AutoCodes.com

P2551 DODGE More Information

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