Hybrid Vehicle Resource Center
Explore expert insights, battery maintenance, troubleshooting tips, and replacement advice for hybrid vehicles.
From warning signs and battery lifespan to summer heat, cooling systems, and hybrid diagnostics, our articles are designed to help hybrid owners better understand how their vehicles work and how to keep them running reliably for years to come.
Whether you’re researching a Prius battery issue, comparing hybrid battery replacement options, or simply looking to extend the life of your hybrid vehicle, you’ll find practical, real-world information from our team of Hybrid Geeks.
What Does Code P0BBD Mean on a Tahoe, Yukon, or Escalade Hybrid?
P0BBD means the hybrid control system detected that voltage variation within the high-voltage battery pack exceeded the allowable limit. On GM Two-Mode hybrids such as the Chevrolet Tahoe Hybrid, GMC Yukon Hybrid, and Cadillac Escalade Hybrid, this code deserves close...
What Does Trouble Code P3009 Mean on a Toyota Prius?
P3009 is a Toyota hybrid trouble code that indicates the high-voltage system has developed an electrical isolation or leakage fault. It appears most commonly in older Toyota hybrid service information, including earlier Prius applications. The code means the vehicle...
What Does Code P0AA6 Mean on a Hybrid? High-Voltage Isolation Fault Explained
P0AA6 means the hybrid system has detected reduced electrical insulation between the high-voltage system and the vehicle body or chassis. Its standard description is Hybrid/EV Battery Voltage System Isolation Fault, but the name can be misleading. P0AA6 does not...
Understanding Trouble Codes C1310 and U0100 on a Toyota Prius
Seeing C1310 and U0100 on a Toyota Prius can be confusing because the two codes come from different systems. C1310 is generally stored by the brake or skid-control ECU after the hybrid control system reports a malfunction. U0100 means a control module has lost...
What Does Trouble Code P0A80 Mean?
P0A80 means the hybrid control system has detected a significant performance problem within the high-voltage battery pack. Its standard description is “Replace Hybrid Battery Pack,” and it is one of the strongest diagnostic trouble codes associated with hybrid battery...
P3000 Code: What It Really Means for Your Hybrid Battery
Seeing P3000 on a Toyota or Lexus hybrid can make it look like the high-voltage battery has failed. In reality, P3000 is usually a higher-level battery control system code that tells you the hybrid control system received an abnormal signal from the battery control...
Understanding Trouble Code P0886: TCM Power Relay Control Circuit Low
P0886 means the vehicle detected a low-voltage condition in the Transmission Control Module power relay control circuit. The Transmission Control Module, commonly called the TCM, needs a stable electrical power supply to operate the transmission correctly. Depending...
What Does the P0562 Code Mean? System Voltage Low
P0562 means one of the vehicle’s control modules detected that the low-voltage electrical system dropped below the range expected for normal operation. On a hybrid, this usually refers to the 12-volt electrical system, not the high-voltage traction battery. The cause...
Trouble Code P0517: 12-Volt Battery Temperature Sensor Circuit High
P0517 means the vehicle detected an abnormally high electrical signal in the 12-volt battery temperature sensor circuit. On applicable Toyota and Lexus hybrids, this sensor monitors the temperature of the auxiliary 12-volt battery so the vehicle can adjust charging...
What to Do If Your Prius Won’t Start but the Lights Turn On
If your Toyota Prius has dashboard lights but will not go into READY mode, the car has electrical power but the hybrid system has not successfully started. That does not automatically mean the high-voltage hybrid battery is dead. Possible causes range from a weak...
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