P2638: Torque Management Feedback Signal A Range/Performance
What Does P2638 Mean?
P2638 is a diagnostic trouble code indicating: Torque Management Feedback Signal A Range/Performance. This code relates to the powertrain system. It has been reported in NHTSA complaints across 3 different vehicle models.
Symptoms of P2638
- ⚠️ Check engine light illuminated
- ⚠️ Traction control system activated
Common Causes
- 🔍 Stuck or failed EGR valve
- 🔍 Wiring or connector problem
- 🔍 Camshaft position sensor failure
- 🔍 Sensor or control module malfunction
P2638 Reports by Year
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"The car has stalling problems and low power problem (changed 3 batteries in 5 years), took to dealership first time and they could not confirmed what's wrong. The problem became worse and stalled a few times, took to local shop and code p2638 torque management feedback signal came back, indicating p"
— Honda Odyssey owner, 04/11/2022
"For years, dating back to 2018, our 2016 Honda Pilot Elite auto on/off switch operations has been failing. Vehicle will not restart the engine after its engaged the auto start off. Engine and all components including electrical are off. Dashboard indications light up and essentially we are stalle"
— Honda Pilot owner, 09/19/2018
"Vehicle stalls and shuts off at a stop when engine idle stop is enabled. All lights on dashboard are illuminated and vehicle automatically sets to N gear. Upon attempting to restart engine, It takes several attempts to put vehicle back into P gear and start engine by pressing the push start button a"
— Honda Pilot owner, 04/28/2022
Source: NHTSA Complaints Database
Most Reported Vehicles for P2638
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | HONDA PILOT | |
| 2 | JEEP WRANGLER | |
| 3 | HONDA ODYSSEY |
P2638 Reports by Vehicle
Detailed NHTSA complaint analysis for each vehicle model.
Frequently Asked Questions
Can I drive with this code?
Will this code clear itself?
How do I find the exact cause?
What To Do Next
Possible Fixes
- 🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
- 🔧 Test the relevant sensor(s) with a multimeter before replacing
- 🔧 Inspect wiring harness and connectors for damage, corrosion, or loose connections
- 🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.