P2C89Hybrid/EV Battery System Precharge Current Too High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Before the main contactors close, the DC link capacitors are charged through a current-limiting path. P2C89 is stored when the current in that phase exceeds its limit, which points to a short or an unexpected load on the high-voltage bus, a precharge resistor that is bypassed, or a measurement error. A Motiv Power Systems patent explains why this matters: the inrush into capacitance or a short can damage parts or weld contactor tips. Bentley names P2C8900 in the battery management unit (address 008C) of its 2025-26 Continental GT/GTC and Flying Spur plug-in hybrids, alongside P0C7800 and an insulation measurement fault; both precharge codes light the MIL, and the cure is a software update of the battery controller and DC/DC converter. P0C77 and P0C78 judge precharge time.
- What you may notice
- MIL and high-voltage system warning at start-up
- Electric drive or charging unavailable, engine-only on plug-in hybrids
- Likely causes
- PossibleBattery management or DC/DC converter software misjudging the precharge
- PossibleShort or active load on the high-voltage bus during precharge
- PossiblePrecharge resistor shorted or main contactor closing early
- RarePack current sensor reading too high
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.