P2874 code meaning
Clutch B Pressure Disengagement Too High
Powertrain system Generic code P28xx codes Check engine light
What P2874 means
P2874 indicates that clutch B keeps excess pressure while it is being released or should already be open. Clutch B then goes on carrying torque alongside the engaged path, which can be felt as binding, vibration during upshifts from even gears or a car that pulls while in neutral; an overheated clutch is a typical consequence. No manufacturer publishes P2874-specific criteria. CARB 13 CCR 1968.2 sets the general requirement, and GM's Corvette dual-clutch module illustrates the approach: it watches the hold pressure of the open clutch and, if that rises too far, starts the recovery routine for that side. Candidates are a valve that fails to vent, debris in the valve body, a seized shutdown valve or a stuck actuator.
P2874 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 8 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2874
- Binding or vibration on upshifts from even gears
- Car pulls in neutral
- Clutch temperature warning
Common causes of P2874
- Most likelyClutch B valve not venting pressure on release
- PossibleContamination in the valve body from clutch wear
- Less likelySeized shutdown valve or clutch B actuator
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Clutch bClutch actuator bPressure regulator
What each part of P2874 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 8 | Area: transmission. |
| 74 | The exact fault in that area. |
What to do next
- Note P2874 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 P2874
What does P2874 mean?
P2874 means "Clutch B Pressure Disengagement Too High". P2874 indicates that clutch B keeps excess pressure while it is being released or should already be open. It is a generic code, so it means the same on every make.
Is it safe to drive with P2874?
Drive gently and only to a workshop. With P2874 the car can go into limp mode (reduced power) to protect itself.
Will P2874 fail an emissions test?
Yes, it can. P2874 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 P2874 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 8 hours of work. This is a job for a workshop.
Will P2874 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.