Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2005 Toyota PriusFACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODES (DTC) LIST
| DTC | Description |
|---|---|
| DTC C2300 | ACT SYSTEM MALFUNCTION |
| DTC C2301 | SHIFT CHANGING TIME MALFUNCTION |
| DTC C2303 | RELAY MALFUNCTION (+B SHORT) |
| DTC C2304, C2305, C2306 | OPEN OR SHORT CIRCUIT IN U PHASE, V PHASE & W PHASE |
| DTC C2307 | POWER SOURCE MALFUNCTION |
| DTC C2310 | OPEN OR SHORT CIRCUIT IN BATT |
| DTC C2311 | HV COMMUNICATION LINE MALFUNCTION |
| DTC C2312 | POWER SOURCE CONTROL ECU COMMUNICATION LINE MALFUNCTION |
| DTC C2315 | HV SYSTEM MALFUNCTION |
| DTC C2318 | LOW VOLTAGE ERROR (POWER SUPPLY MALFUNCTION) |
If a trouble code is displayed during the DTC check, check the circuit listed for that code in the table below and proceed to the appropriate page.
HINT:
- When the DTC C2300, C2301, C2304, C2305, C2306, C2307, C2311, and C2312 are detected, DTC P3102 indicating the shift control system (parking lock control) malfunctions are detected for the hybrid system as well. Because of this, the hybrid system DTCs must be cleared after clearing the shift control system (parking lock control) DTCs.
- Remove the P CON MAIN fuse to erase DTCs C2300, C2301, C2303, C2304, C2305, C2306, and C2307 because they cannot be erased with the hand-held tester (See DTC CHECK/CLEAR ).
- When a DTC is detected, the master caution light comes on and an error message is indicated on the multi-display.
- The indicator blinks quickly when it takes long to switch between the P position status and the P position release status.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.