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 MANUALSRENAULT198518I/SPORTWAGON L4-2165CC 2.2LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSOXYGEN SENSORTESTING AND INSPECTION
1985 Renault 18I/Sportwagon L4-2165cc 2.2L
Oxygen Sensor: Testing and Inspection
1985 Renault 18I/Sportwagon L4-2165cc 2.2LSECTION Testing and Inspection
1. Test continuity of harness between sensor connector and ECU connector terminal J2-9, and ensure harness is not shorted to ground. Repair or replace harness as necessary.
2. Test continuity between sensor ground and ECU connector terminal J2-13 and repair wiring as necessary.
3. Test fuel system pressure and correct as necessary.
4. Check operation of sensor by driving vehicle with a test lamp connected between diagnostic connector terminals D2-2 and D2-4. Lamp should be out when engine reaches normal operating temperature.
5. If lamp stays lit or lights up when engine reaches normal operating temperature, replace sensor. Additional testing may be necessary to locate the cause of an oxygen sensor failure. Other system failures that may cause a sensor failure include EGR solenoid control, PCV system, secondary ignition circuit and fuel delivery system.
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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.