P3006 on Lexus: How to Diagnose & Fix
Battery State-Of-Charge Uneven (Hybrid Battery Imbalance)
1 Lexus model · 1 documented issue · 1 critical · $1,200-$3,500 repair
P3006 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
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P3006 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 P3006 mean on a Lexus?
P3006 stands for "Battery State-Of-Charge Uneven (Hybrid Battery Imbalance)." This code, used on hybrid vehicles such as Toyota/Lexus, indicates the hybrid battery control system detected an unacceptably uneven state of charge between the cells or modules of the high-voltage battery pack. The system monitors the delta (difference) in charge across the pack to keep cells balanced. A large imbalance usually points to one or more weakening modules or cells, and is common after extended storage or as the pack ages. Left unresolved it can lead to reduced hybrid performance and eventual battery failure. On Lexus it is documented across 1 model: CT.
What are the most common causes of P3006?
The most common causes of P3006 are: Weak or failing hybrid battery module/cell, Aged or degraded high-voltage battery pack, Extended vehicle storage (self-discharge imbalance), Corroded battery bus bars or terminals, Battery cooling system blockage / overheating, Faulty battery ECU/sensor reading, Weak 12V auxiliary battery affecting readings. The specific cause varies by vehicle.
How much does it cost to fix P3006 on a Lexus?
Published repair estimates on Lexus range from $1,200 to $3,500 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 P3006 on a different make?
View P3006 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.