P1E00: Hybrid Powertrain Control Module Requested MIL Illumination
4 vehicles · 2 makes · $1,000-$8,000 repair
Most Reported On
P1E00 is an OBD-II diagnostic trouble code meaning “Hybrid Powertrain Control Module Requested MIL Illumination.” This manufacturer-specific code (common on GM hybrids such as the Chevrolet Volt) means a hybrid powertrain control module has detected its own fault and requested that the engine computer turn on the check engine light (MIL). In other words, P1E00 is a 'pointer' code: it tells you a separate hybrid-system DTC has been stored elsewhere and is the real reason the light is on. The engine computer sets P1E00 in response to that request. To diagnose it, the underlying hybrid or battery system code(s) must be read and addressed. This code is most commonly reported on 2016-2019 Chevrolet Volt, 2014-2016 Cadillac ELR, and 2017-2022 Chevrolet Bolt EV, plus 1 other vehicle, with repair costs ranging from $1,000 to $8,000.
Common Causes
Typical Repair Cost
Based on 7 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P1E00, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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Vehicles Affected (4)
Battery Energy Control Module (BECM) Causing Loss of Motive Power
High-Voltage Battery Coolant Heater Failure (Gen 1)
High-Voltage Battery Fire Risk Recall (NHTSA 21V-560)
Propulsion Power Reduced Warning During Towing
Battery Capacity Degradation Over Time
FAQ
What does P1E00 mean?
P1E00 stands for "Hybrid Powertrain Control Module Requested MIL Illumination." This manufacturer-specific code (common on GM hybrids such as the Chevrolet Volt) means a hybrid powertrain control module has detected its own fault and requested that the engine computer turn on the check engine light (MIL). In other words, P1E00 is a 'pointer' code: it tells you a separate hybrid-system DTC has been stored elsewhere and is the real reason the light is on. The engine computer sets P1E00 in response to that request. To diagnose it, the underlying hybrid or battery system code(s) must be read and addressed.
What are the most common causes of P1E00?
The most common causes of P1E00 are: An underlying hybrid system DTC stored in another module, High-voltage battery or battery management fault, Motor/generator or inverter fault, Communication/serial data issue between modules, Software needing an update, Wiring or connector fault within the hybrid system, Faulty hybrid powertrain control module (rare). The specific cause varies by vehicle.
How much does it cost to fix P1E00?
Repair costs for P1E00 range from $1,000 to $8,000, depending on the vehicle and root cause.
Which vehicles are affected by P1E00?
Au7o has documented P1E00 across 4 vehicle models from 2 manufacturers: Cadillac, Chevrolet.
Sources (10)
- NHTSANHTSA BECM Complaints - 61 Reports of Power Loss
- NHTSANHTSA Investigation - 73,000 Gen 2 Volts Probed for Power Loss
- owner-reportBattery Coolant Heater Assembly Replacement - GM-Volt Forum
- ForumReddit r/ChevyBolt: Bolt Battery Recall Discussion
- videoEngineering Explained: Chevrolet Bolt EV Battery Recall Explained
- ForumReddit r/Silverado Thread: Propulsion Power Reduced Warning When Towing 2024 Silverado EV
- NHTSANHTSA Vehicle Page for 2017 Chevrolet Bolt EV - includes complaints and recalls related to battery issues
- ForumReddit r/ChevyBolt thread discussing battery capacity degradation on 2017 Bolt EV
- NHTSANHTSA Vehicle Page for 2014 Cadillac ELR - Includes Complaints and Investigations
- ForumReddit r/MechanicAdvice Thread Discussing Cadillac ELR Charging Issues and DTC Codes P1E00, P0AF0
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.