Error code

OBD2 P2544

OBD2P2544
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Torque Management Request Input Signal 'A'.

Severity

moderateCan drive but may experience harsh shifting and increased fuel consumption.

Summary

P2544 indicates that a torque management request has failed due to issues with input signal A from the engine/fuel management system or transmission control module (TCM). This code is related to the CAN bus communication between these modules.

Symptoms

  • Illuminated warning light
  • Harsh or erratic shifting
  • Increased fuel consumption
  • Engine stalling during idling or low speeds
  • Poor engine idle quality

Common Causes

  • Faulty PCM (Power Control Module) driver circuit
  • Corrupted software in the TCM (Transmission Control Module)
  • Damaged, burnt, shorted, disconnected, or corroded wiring and connectors
  • Bad electrical connections in the CAN bus system

Diagnosis

  1. Record all fault codes and freeze frame data.
  2. Inspect and repair ground connections, including battery negative terminal to engine.
  3. Check reference voltage circuits for faults in sensors or control modules sharing the circuit.

Fixes

  • Repair damaged wiring and connectors
  • Replace faulty PCM or TCM if necessary

FAQ

Can I drive with P2544?

Yes, but you may experience harsh shifting and increased fuel consumption.

What causes P2544?

Common causes include faulty PCM driver circuits, corrupted TCM software, damaged wiring, or poor CAN bus connections.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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