P2E1B code meaning
Drive Motor A Phase X Current Sensor Circuit
Powertrain system Generic code P2Exx codes Check engine light
What P2E1B means
P2E1B reports an electrical fault in the circuit of the phase X current sensor of drive motor A, without a separate low or high verdict. X, Y and Z name a second three-phase winding group: a Mitsubishi Electric patent on two-group motors for hybrid drives couples one current sensor to the conductor of each of the six phases. No manufacturer documents P2E1B publicly. Ford's 2019 hybrids supervise a reference voltage for the motor current sensors and flag it outside 4.5 to 6 V for 500 ms; a fault there would hit every phase at once. CARB allows a sensor mounted on a board inside a control unit to report wiring and range faults under one shared code, so P2E1B may stand in for P2E1D and P2E1E. Since the sensor sits in the inverter, the repair is usually that unit.
P2E1B at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 6 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2E1B
- Hybrid system warning lamp and MIL
- Reduced electric drive or no electric drive
- Rough or noisy motor operation under load
Common causes of P2E1B
- Most likelyPhase X current sensor in the inverter failed
- PossibleReference supply or ground of the current sensors faulty
- PossibleLoose or corroded low-voltage connector at the inverter
- Less likelyDefect on the motor control board that evaluates the sensor
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Drive motor a phase x current sensorWiring harnessHybrid control module
What each part of P2E1B means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 1B | The exact fault in that area. |
What to do next
- Note P2E1B 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 P2E1B
What does P2E1B mean?
P2E1B means "Drive Motor A Phase X Current Sensor Circuit". P2E1B reports an electrical fault in the circuit of the phase X current sensor of drive motor A, without a separate low or high verdict. It is a generic code, so it means the same on every make.
Is it safe to drive with P2E1B?
Drive gently and only to a workshop. With P2E1B the car can go into limp mode (reduced power) to protect itself.
Will P2E1B fail an emissions test?
Yes, it can. P2E1B 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 P2E1B to fix?
Difficulty: workshop only. A typical repair takes 1 to 6 hours of work. This is a job for a workshop.
Will P2E1B clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.