What are the common causes of P2DCB?

Phase current sensors X, Y and Z disagreeing. One phase current sensor drifting. A wiring fault on a phase current sensor. An inverter current sensing fault. A loose phase current connector.

Compare phase X, Y and Z current on a scan tool. Inspect each phase current sensor connector. Test each phase current sensor. Check the inverter current sensing. Replace the drifting phase current sensor. Clear the code and retest.

P2DCB

Starter/Generator Phase X-Y-Z Current Sensor Correlation

System: Powertrain control (P code)
Lamp: Check Engine Light
Category: Powertrain - Fuel/Air Metering

What it means

P2DCB means Starter/Generator Phase X-Y-Z Current Sensor Correlation.

Where it lives

For P2DCB, the description names the sensor as the part involved.

Check these first

Phase current sensors X, Y and Z disagreeing
One phase current sensor drifting
A wiring fault on a phase current sensor
An inverter current sensing fault
A loose phase current connector

What to do next

Compare phase X, Y and Z current on a scan tool
Inspect each phase current sensor connector
Test each phase current sensor
Check the inverter current sensing
Replace the drifting phase current sensor
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.