P0A1DHybrid/EV Powertrain Control Module A
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- The hybrid powertrain control module coordinates engine, motors and battery. P0A1D says this module has reported an internal failure or is no longer working reliably. In GM hybrid tables (2013) the engine control module stores P0A1D when a message from motor control processor A signals a hybrid controller status failure in 3 of 4 counts, as a Type B code with MIL after two trips. GM 2016 tables list P0A1D among codes that limit engine power. Subaru warns for the 2014-16 Crosstrek Hybrid that generic OBD readouts may store P0A1D from a scan tool communication error; replace the module only if the code returns. P0E43 covers module B.
- What you may notice
- MIL and hybrid warning on
- Engine power reduced
- Hybrid functions limited or unavailable
- Likely causes
- LikelyInternal fault of the hybrid control module
- PossibleCode stored by a scan tool communication error, not by a real defect
- RareSupply, ground or network fault at the module
- 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.