What are the common causes of P2546?

A short to ground on the torque management request input A circuit. An open in the torque management request input A wiring. A failed accelerator pedal position sensor. Low battery voltage weakening the signal.

Read torque management request input A on a scan tool. Test the torque management request input A circuit for a short to ground. Check the torque management request input A wiring for an open. Check battery voltage and connections. Replace the accelerator pedal position sensor if the circuit tests good. Clear the code and retest.

P2546

Torque Management Request Input Signal A Low

System: Speed and idle control (P code)
Lamp: Check Engine Light
Category: Powertrain - Computer and Auxiliary Controls

What it means

P2546 means Torque Management Request Input Signal A Low.

Check these first

A short to ground on the torque management request input A circuit
An open in the torque management request input A wiring
A failed accelerator pedal position sensor
Low battery voltage weakening the signal

What to do next

Read torque management request input A on a scan tool
Test the torque management request input A circuit for a short to ground
Check the torque management request input A wiring for an open
Check battery voltage and connections
Replace the accelerator pedal position sensor if the circuit tests good
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.