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.
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HOMESERVICE MANUALSTOYOTA2018PRIUS TWO ECOREPAIR AND DIAGNOSISHYBRID/ELECTRIC POWERTRAINTESTING AND DIAGNOSISHYBRID CONTROL SYSTEM (LITHIUM-ION) - DIAGNOSTIC CODES (4 OF 4) & CIRCUIT TESTSHYBRID CONTROL SYSTEM (FOR LITHIUM-ION BATTERY)DTC U0424-81: HVAC CONTROL MODULE TO HYBRID POWERTRAIN CONTROL MODULE INVALID SERIAL DATA RECEIVED [11/2015 - ]DESCRIPTION
2018 Toyota Prius Two Eco
DTC U0424-81: HVAC Control Module to Hybrid Powertrain Control Module Invalid Serial Data Received [11/2015 - ]: Description
2018 Toyota Prius Two EcoSECTION Description
If the hybrid vehicle control ECU receives an invalid compressor control request from the air conditioning amplifier assembly via CAN communication, it will store this DTC.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| U0424-81 | HVAC Control Module to Hybrid Powertrain Control Module Invalid Serial Data Received | Invalid control request received from the air conditioning amplifier assembly (1 trip detection logic) |
Air conditioning amplifier assembly | Does not come on | Master Warning Light: Does not come on |
RENDER: 1.0x
NO RELATED
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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.