P3000 on Mitsubishi
Hybrid/High-Voltage Battery Control System Malfunction (Parent Code)
P3000 on Mitsubishi vehicles indicates hybrid/high-voltage battery control system malfunction (parent code). Au7o has documented this code across 1 Mitsubishi model — most commonly on Outlander. 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. Typical repair costs on Mitsubishi range from $150 to $600, depending on the specific model and root cause.
Common Causes of P3000
- •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
P3000 on Mitsubishi by Model
Mitsubishi Outlander(1 issue)
- 12V Auxiliary Battery Parasitic Drain / Repeated Dead Battery2022-2024
Fourth-generation Outlander and Outlander PHEV owners (2022+) report the 12V auxiliary battery repeatedly going flat, sometimes leaving the car dead in a day or two, even on nearly new vehicles and with the traction battery fully charged. Identified culprits on owner forums include the OEM infotainment/radio head unit failing to fully sleep, a driver's seat control module intermittently drawing current, a WiFi/telematics module, and a charging logic that tops up the 12V battery on a fixed daily timer rather than by voltage - so a low battery may never recover. Distinct from the high-voltage traction-battery issues.
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What does P3000 mean on Mitsubishi?▼
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 Mitsubishi specifically, this code is documented across 1 model.
What causes P3000 on Mitsubishi vehicles?▼
Common causes on Mitsubishi: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P3000 on a Mitsubishi?▼
Repair costs on Mitsubishi range from $150 to $600, depending on the specific model and root cause.
Which Mitsubishi models have P3000 documented?▼
Au7o has documented P3000 on 1 Mitsubishi model: Outlander.