P2873 code meaning
Clutch B Pressure Engagement Too High
Powertrain system Generic code P28xx codes Check engine light
What P2873 means
P2873 is set when clutch B is applied with more pressure than planned while it engages. In dual-clutch designs clutch B usually carries the even gears and reverse, as in Ford's DPS6 and GM's Corvette unit, so the fault tends to surface as jerky shifts into second, fourth or reverse and a hard bite when manoeuvring. Manufacturer documentation for P2873 is not public. CARB 13 CCR 1968.2 calls for functional checks of transmission controls; in GM's 2023 Corvette table the comparable high-pressure check of clutch 2 appears under P2856, classed as Type A. Worth checking are a sticking pressure control solenoid for clutch B, line pressure set too high, a sensor that over-reads, or adaptation values that have drifted.
P2873 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 P2873
- Jerky shifts into even gears or reverse
- Hard bite when manoeuvring
- Warning lamp, limp mode possible
Common causes of P2873
- Most likelyClutch B pressure control solenoid sticking high
- PossibleSystem (line) pressure above specification
- PossibleDrifted or reset adaptation values for clutch B
- Less likelyClutch B pressure sensor over-reading
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 P2873 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. |
| 73 | The exact fault in that area. |
What to do next
- Note P2873 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 P2873
What does P2873 mean?
P2873 means "Clutch B Pressure Engagement Too High". P2873 is set when clutch B is applied with more pressure than planned while it engages. It is a generic code, so it means the same on every make.
Is it safe to drive with P2873?
Drive gently and only to a workshop. With P2873 the car can go into limp mode (reduced power) to protect itself.
Will P2873 fail an emissions test?
Yes, it can. P2873 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 P2873 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 8 hours of work. This is a job for a workshop.
Will P2873 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.