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 MANUALSLEXUS2010RX 450H 3.5 BREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCRUISE CONTROL SYSTEMSDYNAMIC RADAR CRUISE CONTROL SYSTEM (DIAGNOSTIC CODES & CIRCUIT TESTS)DYNAMIC RADAR CRUISE CONTROL SYSTEMDTC C1A40: ENG / EHV DEVICE (FROM 8/2009)DESCRIPTION
2010 Lexus RX 450h 3.5 B
DTC C1A40: ENG / EHV Device (From 8/2009): Description
2010 Lexus RX 450h 3.5 BSECTION Description
When the driving support ECU receives a hybrid control system or SFI system malfunction signal from the power management control ECU or ECM via the CAN communication line, DTC C1A40 is stored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1A40 | While power switch is on (IG), hybrid control system or SFI system malfunction signal is detected for 1 second |
|
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.