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.
2013 Toyota Prius TwoFACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code Chart
WARNING: This page is about a different variant/trim than selected.
HINT:
If a trouble code is stored during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the information below.
CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
| DTC Code | Detection Item | Refer to |
|---|---|---|
| B27A1 | Open in Driver Side Electrical Antenna Circuit | Refer to DTC B27A1: Open in Driver Side Electrical Antenna Circuit |
| B27A2 | Open in Front Passenger Side Electrical Antenna Circuit | Refer to DTC B27A2: Open in Front Passenger Side Electrical Antenna Circuit |
| B27A5 | Open in Front Floor Electrical Key Oscillator Circuit | Refer to DTC B27A5: Open in Front Floor Electrical Key Oscillator Circuit |
| B27A6 | Open in Rear Floor Electrical Key Oscillator Circuit | Refer to DTC B27A6: Open in Rear Floor Electrical Key Oscillator Circuit |
| B27A7 | Open in Inside Luggage Compartment Electrical Key Oscillator Circuit | Refer to DTC B27A7: Open in Inside Luggage Compartment Electrical Key Oscillator Circuit |
| B27A8 | Open in Outside Luggage Compartment Electrical Key Antenna Circuit | Refer to DTC B27A8: Open in Outside Luggage Compartment Electrical Key Antenna Circuit |
- *: w/ Entry System Back Door Open Function
Factory Service Tools
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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.