Torque Management Request Input Signal Range/Performance
The P2549 code indicates that the Powertrain Control Module (PCM) has detected a signal from the torque management request input that is outside the expected range or has a performance issue. This input typically comes from the transmission control module or other vehicle systems requesting torque reduction for shift quality or stability control. The PCM monitors this signal to adjust engine torque accordingly. A range/performance fault suggests the signal voltage or frequency is erratic, intermittent, or out of spec, which can affect drivability and transmission operation.
01. Most Common Causes
- Faulty torque management request sensor or switch
- Wiring or connector issues in the torque management circuit
- Malfunctioning transmission control module (TCM) or PCM
- Software calibration errors in the PCM
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Harsh or delayed transmission shifts
- Reduced engine power or limp mode
- Poor fuel economy
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all stored codes and freeze frame data.
Step 2: Inspect the torque management request circuit wiring and connectors for damage, corrosion, or loose connections.
Step 3: Test the torque management request sensor/switch per manufacturer specifications.
Step 4: Check for any TCM or PCM software updates and reprogram if necessary.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances with this code as it can cause transmission shifting issues and reduced engine power, potentially leading to unsafe driving conditions.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and minor repairs like wiring fixes, but could be higher if a sensor or module replacement is needed.