P2DA0High Voltage System Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2DA0 is the plausibility code of this group: the high-voltage system is neither clearly too low nor too high, but its readings or behaviour do not fit together. CARB 13 CCR 1968.2 asks for such rationality checks on inputs, stored separately from circuit and range faults. No manufacturer documents P2DA0 publicly. A typical cross-check appears in GM's 2013 eAssist table under P1AEC: with contactors closed, the motor control processor compares its own bus voltage with the pack voltage and the sum of the mid-pack readings and flags a difference of 15 V or 10 V, two trips, Type B. Differing sensors, a high-resistance HV joint, contactor contacts that have burnt or a slow precharge lead there. Power is usually limited.
- What you may notice
- Hybrid or EV system warning, check engine light
- Reduced drive power or no electric drive
- Fault appears under heavy load or after a long stop
- Likely causes
- PossibleVoltage sensors in battery and inverter disagree
- PossibleHigh resistance in an HV connector, busbar or fuse
- PossibleMain contactor contacts burnt or welded
- RareCalibration or software of a controller, update available
- 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: €150 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.