Hybrid Powertrain Control Module Requested MIL Illumination
What it means
The hybrid control module is asking for the check-engine light to be switched on. The name describes the request, not what failed.
Can I keep driving? Usually yes in the short term, but get it read, because the real fault is stored in another code.
Common symptoms
What you'll notice
- Check-engine light on
- Other hybrid warning lights may be on
- No other obvious driving change; the light is the main sign
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Common causes
Most likely first
- Another fault stored in the hybrid or engine system
- Wiring or connector fault in a circuit that another stored code points to
- Hybrid control module setting the request after any stored fault
Repair
Likely repair
- Parts often involved: hybrid/EV control unit, data network (CAN bus) or gateway
- Labor: 0.5–1.5 h
- Difficulty: Medium
- DIY: Garage recommended
How to diagnose & fix
Work through it in order
- Read all codes from every module and treat the other codes first.
- Clear nothing until they are written down.
- Check the 12-volt battery voltage and terminals.
- Then follow the checks for each other code you find.
Related codes
About this page
Scan figures come only from diagnostic scans recorded through our own apps and tools. Cars are usually scanned because a symptom or warning light prompted it, so these figures describe our scan records, not how often a fault occurs in any make or model.
Notes about specific manufacturers summarise public records (NHTSA owner complaints, recalls and manufacturer service bulletins), cited under each note. They report what those records say, not our measurements, and they do not suggest that any manufacturer or vehicle is better or worse than another.
Repair time and cost estimates come from a public repair dataset and are typical ranges, not quotes.
OBD DashX is not affiliated with, sponsored by or endorsed by any vehicle manufacturer. Manufacturer and model names and trademarks belong to their owners and are used only to identify vehicles.
This page is general information, not professional advice. Have safety-critical faults (brakes, steering, airbags, high-voltage systems) checked by a qualified technician. To the extent the law allows, we accept no liability for repairs or decisions made from this page.
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