P3000 on Lexus: How to Diagnose & Fix
Hybrid/High-Voltage Battery Control System Malfunction (Parent Code)
2 Lexus models · 2 documented issues · 2 critical · $1,200-$5,000 repair
P3000 on Lexus by model: symptoms, diagnosis and fix
The CT200h NiMH hybrid battery pack loses capacity over time, reducing fuel economy and hybrid system effectiveness. The CT200h uses the same hybrid system as the Toyota Prius, and battery degradation follows a similar pattern. Hot climates accelerate degradation, and cells can develop internal resistance imbalances.
Common Symptoms
- Fuel economy drops by 5-10 MPG
- Hybrid battery warning light
- Engine runs more frequently than expected
- Reduced EV-only driving range
- Battery gauge fluctuates rapidly
How to Fix
Replace the hybrid battery pack with a new or refurbished unit. The CT200h battery is the same as the third-generation Prius, so aftermarket options are plentiful and affordable. Refurbished packs from Green Bean Battery or hybrid specialists cost $1,200-$2,000 installed.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- G9510-76014 genuine Lexus HEV supply battery assemblyOEMG9510-76014
Confirm VIN and supersession before ordering; core return applies.
- 2011-2017 Lexus CT200h complete hybrid battery replacementOEM2011-2017 CT200h hybrid battery replacement
Shipping/core-return and regional mobile-installation branches carry different terms; confirm exact option and service
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
The ES300h hybrid battery pack experiences capacity degradation over time, particularly in hot climates where thermal cycling accelerates cell deterioration. Owners report reduced fuel economy, inability to maintain EV mode, and eventually a hybrid system warning light. The NiMH battery pack typically begins showing degradation between 8-12 years of age.
Common Symptoms
- Decreased fuel economy by 5-10 MPG
- Hybrid system warning light on dashboard
- Unable to enter or maintain EV mode
- Reduced acceleration performance
- Battery charge gauge drops rapidly
How to Fix
Replace the hybrid battery pack with a new or refurbished unit. Lexus dealers charge $3,000-$5,000 for a new pack. Aftermarket refurbished packs from companies like Green Bean Battery or Dorman cost $1,500-$2,500 installed. Individual cell replacement is also possible for partial degradation.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- 2013-2017 Lexus ES300h complete hybrid battery replacementOEM2013-2017 ES300h hybrid battery replacement
Replace a diagnosed failed 2013-2017 ES300h pack through a model-specific remanufactured/new program Fitment/availability: Live configurable product page covers the pre-2019 ES300h branch and offers shipping/core-return or regional insta…
- 2013-2018 Lexus ES300h reconditioned hybrid battery installationOEM2013-2018 ES300h reconditioned pack service
Replace a diagnosed failed AVV60-generation pack through the vendor's installed service Fitment/availability: Live page title/content lists 2013-2018 ES300h and states the product is not shipped or purchased as an online DIY item; instal…
- G9510-33112 genuine Lexus HEV supply battery assemblyOEMG9510-33112
Confirm VIN and core terms.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
P3000 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P3000 mean on a Lexus?
P3000 stands for "Hybrid/High-Voltage Battery Control System Malfunction (Parent Code)." P3000 is a high-voltage battery malfunction code used mainly on hybrid vehicles (commonly Toyota and Lexus), set when the hybrid/battery control system detects an abnormality in the HV battery pack or its monitoring system. It is intentionally a generic 'parent' code — the specific fault (weak cell block, cooling problem, communication loss, contactor issue) is identified by accompanying sub-codes (INF codes). It can cause warning lights, reduced hybrid assist, or the vehicle refusing to enter Ready mode. Because it involves the high-voltage system, it is important and usually needs hybrid-capable diagnostic equipment. On Lexus it is documented across 2 models: CT, ES.
What are the most common causes of P3000?
The most common causes of P3000 are: Weak or degraded HV battery cell block/module, Battery cooling fan failure or blocked cooling airflow, Loss of CAN communication between battery ECU and hybrid ECU, Battery ECU / battery management system fault, Stuck contactor or insulation (leak/short) fault, Corroded or loose HV battery connections/bus bars, Aging high-mileage hybrid battery pack. The specific cause varies by vehicle.
How much does it cost to fix P3000 on a Lexus?
Published repair estimates on Lexus range from $1,200 to $5,000 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P3000 on a different make?
View P3000 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.