P2D96 code meaning
Starter/Generator Phase Y Current Sensor Circuit Low
Powertrain system Generic code P2Dxx codes Check engine light
What P2D96 means
P2D96 covers the phase Y current sensor of the starter/generator when its signal drops below the valid range, for instance through a short to ground or a missing sensor supply. For the driver the more important part is how the controller reacts: without a trustworthy phase current it will usually limit or stop electric assist, stop-start can be suspended and charging through the machine may fall back, with a warning lamp. In GM's eAssist analogue the switch to sensorless current control happens within about 0.19 s, and the code is stored as Type B over two trips. No manufacturer documents P2D96 publicly. Check sensor supply and ground at the machine first. P2D93 is the high fault of Y; the series goes on with P2D97 for phase Z low, and P2D99 is the intermittent Y fault.
P2D96 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2D96
- Electric assist reduced or switched off
- Stop-start suspended
- Battery or system warning, charging may be reduced
Common causes of P2D96
- Most likelyPhase Y sensor signal pulled to ground by damaged insulation
- PossibleOpen circuit in the sensor supply or a backed-out terminal
- PossiblePhase Y current sensor defective
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Starter generator phase y current sensorWiring harnessStarter generator control module
What each part of P2D96 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 96 | The exact fault in that area. |
What to do next
- Note P2D96 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 P2D96
What does P2D96 mean?
P2D96 means "Starter/Generator Phase Y Current Sensor Circuit Low". P2D96 covers the phase Y current sensor of the starter/generator when its signal drops below the valid range, for instance through a short to ground or a missing sensor supply. It is a generic code, so it means the same on every make.
Is it safe to drive with P2D96?
Drive gently and only to a workshop. With P2D96 the car can go into limp mode (reduced power) to protect itself.
Will P2D96 fail an emissions test?
Yes, it can. P2D96 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 P2D96 to fix?
Difficulty: hard. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P2D96 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.