P1E00 on Chevrolet
Hybrid Powertrain Control Module Requested MIL Illumination
P1E00 on Chevrolet vehicles indicates hybrid powertrain control module requested mil illumination. Au7o has documented this code across 3 Chevrolet models — most commonly on Bolt EV, Silverado EV, Volt. 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.
Common Causes of P1E00
- •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)
P1E00 on Chevrolet by Model
Chevrolet Bolt EV(2 issues)
- Battery Capacity Degradation Over Time2017-2023
The Bolt EV 60/65 kWh battery pack experiences capacity degradation over time, reducing the vehicle range from the original EPA rating. Early 2017-2018 models with the original LG battery showed faster degradation, losing 10-15% capacity in the first 50,000 miles. Vehicles that received the recall battery replacement generally show slower degradation rates. Factors that accelerate degradation include frequent DC fast charging, regularly charging to 100%, leaving the battery at full charge for extended periods, and exposure to extreme heat. The battery management system (BMS) also recalibrates periodically, which can cause sudden apparent range drops.
- High-Voltage Battery Fire Risk Recall (NHTSA 21V-560)2017-2022
All 2017-2022 Bolt EV and 2022 Bolt EUV vehicles were subject to a massive recall for battery fire risk. LG Energy Solution manufactured battery cells with two simultaneous defects — a torn anode tab and a folded separator — that could cause an internal short circuit and thermal runaway (fire) during charging, particularly when the battery was charged to 100%. Multiple Bolt EVs caught fire while parked and charging, leading GM to halt sales and production temporarily. GM ultimately replaced every battery module in every affected vehicle at no cost.
Chevrolet Silverado EV(1 issue)
- Propulsion Power Reduced Warning During Towing2024-2025
When towing or driving on steep grades, the Silverado EV may display a "Propulsion Power Reduced" warning and limit motor output significantly. The battery management system is overly conservative with thermal management during high-load scenarios, triggering power derates before the battery reaches critical temperatures.
Chevrolet Volt(2 issues)
- Battery Energy Control Module (BECM) Causing Loss of Motive Power2016-2019
NHTSA received 61 complaints about second-generation Volts losing motive power due to Battery Energy Control Module (BECM) failure. The BECM manages the high-voltage battery system, and when it fails, the vehicle can stall, enter a reduced power state, or refuse to start. Loss of power can occur at any speed, creating a serious safety hazard. The vehicle may be unable to restart after a BECM-related shutdown.
- High-Voltage Battery Coolant Heater Failure (Gen 1)2011-2015
First-generation Volts (2011-2015) can experience battery coolant heater failure. The heating coil is located inside the battery pack and can develop isolation faults, causing the vehicle to run on gasoline only when the battery is below 50 degrees F. The poor design placement requires opening the battery pack to test and replace the heater coil. A failing heater coil measures below the required 80 ohms isolation resistance. This significantly reduces EV range in cold weather and can trigger fault codes.
Looking for P1E00 on a different make?
View P1E00 across all makes →Frequently Asked Questions
What does P1E00 mean on Chevrolet?▼
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. On Chevrolet specifically, this code is documented across 3 models.
What causes P1E00 on Chevrolet vehicles?▼
Common causes on Chevrolet: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P1E00 on a Chevrolet?▼
Repair costs vary widely depending on the root cause and specific Chevrolet model.
Which Chevrolet models have P1E00 documented?▼
Au7o has documented P1E00 on 3 Chevrolet models: Bolt EV, Silverado EV, Volt.