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 MANUALSTOYOTA2019SEQUOIA LIMITED, 4WDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM (3UR-FE) - DIAGNOSTIC CODES (5 OF 9)SFI SYSTEMDTC P144C: OPEN IN SECONDARY AIR INJECTION SYSTEM HEATER CONTROL CIRCUIT; DTC P144D: SHORT IN SECONDARY AIR INJECTION SYSTEM HEATER CONTROL CIRCUIT [08/2015 - 08/2017]DESCRIPTION
2019 Toyota Sequoia Limited, 4WD
DTC P144C: Open in Secondary Air Injection System Heater Control Circuit; DTC P144D: Short in Secondary Air Injection System Heater Control Circuit [08/2015 - 08/2017]: Description
2019 Toyota Sequoia Limited, 4WDSECTION Description
The ECM operates the air pump heater relay which causes the air pump heater to operate.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P144C | Open or short in the air pump heater relay circuit for 5 seconds (1 trip detection logic). |
|
| P144D | Open or short in the air pump heater relay circuit for 5 seconds (1 trip detection logic). |
|
RENDER: 1.0x
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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.