P258F code meaning
Torque Management Request Output Signal
Powertrain system Generic code P25xx codes Check engine light
What P258F means
P258F concerns the sending side of a torque management link. One controller – for example the engine module talking to a transmission or hybrid controller, or the reverse – transmits torque requests and finds that its own output is faulty, missing or not accepted by the receiver. The receiving side is better documented as P2544 and following: GM's 2020 table 20OBDG04 checks incoming torque requests from the TCM for a wrong protection value, a broken rolling counter and implausible magnitudes, Type B. No manufacturer documents P258F publicly. CARB's rule requires output components driven by a computer to be checked for correct functional response where feasible, which is the logic behind such a code. Typical causes are CAN wiring, mismatched software after programming or a faulty module. Harsh shifts or reduced power can follow.
P258F at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P258F
- Check engine lamp on
- Harsh or delayed shifts
- Reduced engine power
Common causes of P258F
- Most likelyCAN wiring or connector fault between the modules
- PossibleSoftware levels of sending and receiving module do not match
- PossibleLow voltage or poor ground at one of the modules
- Less likelySending control module internally faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Torque management output
What each part of P258F means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| 8F | The exact fault in that area. |
What to do next
- Note P258F and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P258F
What does P258F mean?
P258F means "Torque Management Request Output Signal". P258F concerns the sending side of a torque management link. It is a generic code, so it means the same on every make.
Is it safe to drive with P258F?
Drive gently and only to a workshop. With P258F the car can go into limp mode (reduced power) to protect itself.
Will P258F fail an emissions test?
Yes, it can. P258F is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P258F to fix?
Difficulty: hard. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will P258F clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.