P0C5B code meaning
Drive Motor A Position Sensor Circuit B Range/Performance
Powertrain system Generic code P0Cxx codes Check engine light
What P0C5B means
P0C5B is set when the second resolver winding of motor A (Circuit B) stays within its electrical limits yet carries a signal that does not make sense next to the first winding. Bentley added it in revision 3 of bulletin 2080242 for the Continental GT, GTC and Flying Spur hybrids: P0C5B00 now appears alongside P0C5100 and P0A4000, which shows that both windings lose plausibility at once when the shared connection is poor. The repair path is the same, measured value logs, inspection of the 8-pin and 32-pin plugs for pin drag and corrosion, replacement of a 90-degree connector after approval, then basic settings. No threshold is published. P0C5C to P0C5E are the low, high and sporadic Circuit B faults.
P0C5B at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1.5 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0C5B
- Drive system fault shown in the cluster
- Electric drive mode not available
- Usually stored together with P0C51 and P0A40
Common causes of P0C5B
- Most likelyInsufficient terminal grip at the sensor or power electronics connector
- PossibleFaulty 90-degree connector on affected Bentley hybrids (TPI 2080242/3)
- PossibleCorrosion, oil or moisture in the resolver plugs
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Drive motor a position sensor bWiring harnessHybrid control module
What each part of P0C5B means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| C | Area: hybrid propulsion. |
| 5B | The exact fault in that area. |
What to do next
- Note P0C5B 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 P0C5B
What does P0C5B mean?
P0C5B means "Drive Motor A Position Sensor Circuit B Range/Performance". P0C5B is set when the second resolver winding of motor A (Circuit B) stays within its electrical limits yet carries a signal that does not make sense next to the first winding. It is a generic code, so it means the same on every make.
Is it safe to drive with P0C5B?
Drive gently and only to a workshop. With P0C5B the car can go into limp mode (reduced power) to protect itself.
Will P0C5B fail an emissions test?
Yes, it can. P0C5B 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 P0C5B to fix?
Difficulty: workshop only. A typical repair takes 1.5 to 5 hours of work. This is a job for a workshop.
Will P0C5B clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.