P0A94DC/DC Converter A Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0A94 reports that a DC/DC converter in the high-voltage system does not perform as commanded. In Toyota hybrids this is the boost converter inside the inverter assembly, which raises the battery voltage before it reaches the motor inverters. Toyota documents P0A94 for 2010–2015 Prius and 2012–2017 Prius v together with P0A1A, P324E and P3004 (bulletin T-SB-0003-21): the cause is damage in the inverter with converter, and the repair depends on the detail code. Recalls 14V-053 and 18V-684 address transistors in the intelligent power module that could overheat; the car then enters a fail-safe mode with reduced power. Not to be confused with the 14 V power module codes P0A86 to P0A8F.
- What you may notice
- MIL, hybrid system and other warning lamps
- Fail-safe mode with greatly reduced power
- Vehicle may stop and not restart
- Likely causes
- LikelyDamaged power transistors in the boost converter / inverter assembly
- PossibleThermal stress from insufficient inverter cooling
- PossibleOutstanding recall or software update not performed
- 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: €300 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.