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 MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 38 (ENGINE CONTROLS - SELF-DIAGNOSTICS)DIAGNOSTIC TESTSDTC P0135, DTC P0141, DTC P0155 OR DTC P0161NOTES
2004 Toyota Matrix XR, FWD, Standard
DTC P0135, DTC P0141, DTC P0155 Or DTC P0161: Notes
2004 Toyota Matrix XR, FWD, StandardSECTION Notes
WARNING: This page is about a different car, the 2002 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.
Code Definition
- DTC P0135: Heated Oxygen Sensor Heater Circuit (Bank No. 1, Sensor No. 1)
- DTC P0141: Heated Oxygen Sensor Heater Circuit (Bank No. 1, Sensor No. 2)
- DTC P0155: Heated Oxygen Sensor Heater Circuit (Bank No. 2, Sensor No. 1)
- DTC P0161: Heated Oxygen Sensor Heater Circuit (Bank No. 2, Sensor No. 2)
CAUTION:
If ECM replacement is instructed in following testing, always ensure ECM harness connector and ground circuit are okay. If either are suspect, repair and repeat testing to confirm ECM malfunction. If ECM is replaced, ECM must be programmed with proper ignition key code for engine immobilizer system. For programming procedures, see COMPUTER RELEARN PROCEDURES - IMPORT
article in GENERAL INFORMATION.
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.