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.
2004 Toyota PriusFACTORY OEM SERVICE PROCEDURE
Push Button Start System DTCS
PUSH BUTTON START SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| B2271 | IGNITION HOLD MONITOR MALFUNCTION |
| B2272 | IGNITION 1 MONITOR MALFUNCTION |
| B2273 | IGNITION 2 MONITOR MALFUNCTION |
| B2274 | ACC MONITOR MALFUNCTION |
| B2275 | STSW MONITOR MALFUNCTION |
| B2277 | DETECTING VEHICLE SUBMERSION |
| B2278 | MAIN SWITCH (POWER SWITCH) MALFUNCTION |
| B2281 | P SIGNAL MALFUNCTION (CABLE-INFORMATION DOES NOT MATCH TO BEAN-INFORMATION) |
| B2282 | VEHICLE SPEED SIGNAL MALFUNCTION (CABLE-INFORMATION DOES NOT MATCH TO BEAN-INFORMATION) |
| B2284 | BRAKE SIGNAL MALFUNCTION (CABLE-INFORMATION DOES NOT MATCH TO BEAN-INFORMATION) |
| B2286 | READY SIGNAL MALFUNCTION |
| B2287, B2289 | LIN COMMUNICATION MASTER MALFUNCTION, KEY COLLATION WAITING TIME OVER |
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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