P0CA1Drive Motor Control Module Requested MIL Illumination
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P0CA1 is a request code, not a component fault: the drive motor control module has detected an emissions-relevant fault of its own and asks the engine control module to light the MIL, which stores P0CA1. Subaru documents this on the 2014 XV Crosstrek Hybrid in bulletin 07-82-14R: P0CA1 sits in the engine module and C1424 in the stability control module, both MIL requests comparable to P0700. They usually accompany the drive motor module codes P0CDD and P0A3F, which set when the 12 V auxiliary battery voltage drops; with those codes in history, reprogramming the drive motor module is the fix, and Subaru changed its logic in production from January 2014. If only P0CA1 and C1424 are present, diagnose per the service manual.
- What you may notice
- Check-engine lamp, often with further warning lamps such as stability control
- Hybrid drive behaving normally or with reduced electric assistance
- Likely causes
- LikelyEmissions-relevant fault stored in the drive motor control module
- PossibleModule software reacting to a low 12 V battery (Subaru 07-82-14R)
- PossibleWeak or discharged 12 V auxiliary battery
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.