P27BC code meaning
Pressure Control Solenoid N Intermittent
Powertrain system Generic code P27xx codes Check engine light
What P27BC means
P27BC reports that the signal or response of pressure control solenoid N drops out now and then rather than failing permanently. No manufacturer documents this code publicly; the GM and Ford dual-clutch documents that use solenoid N for the second synchronizer valve (23OBDG07, Ford TR9070 list) only publish its permanent electrical and hydraulic faults. CARB 13 CCR 1968.2 counts automatic transmission solenoids among the outputs whose circuits must be watched for faults. Loose terminals, a chafed wire that touches only under vibration or heat, or a coil that opens when hot are the usual suspects. Because the fault comes and goes, freeze-frame data and a wiggle test with the harness moved are more useful than a single static measurement.
P27BC at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor1 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P27BC
- MIL that comes and goes
- Occasional missed or delayed shifts
Common causes of P27BC
- Most likelyLoose or spread terminal at solenoid N or TCM
- PossibleChafed wire shorting under vibration
- Less likelyCoil opening intermittently when hot
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Pressure control solenoid nWiring harness
What each part of P27BC means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 7 | Area: transmission. |
| BC | The exact fault in that area. |
What to do next
- Note P27BC 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 P27BC
What does P27BC mean?
P27BC means "Pressure Control Solenoid N Intermittent". P27BC reports that the signal or response of pressure control solenoid N drops out now and then rather than failing permanently. It is a generic code, so it means the same on every make.
Is it safe to drive with P27BC?
Drive gently and only to a workshop. With P27BC the car can go into limp mode (reduced power) to protect itself.
Will P27BC fail an emissions test?
Yes, it can. P27BC 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 P27BC to fix?
Difficulty: medium. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will P27BC clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.