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 MANUALSDODGE AND RAM1992CARAVAN FWD V6-201 3.3LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSOXYGEN SENSORTESTING AND INSPECTIONSENSOR FUNCTIONAL TEST
1992 Dodge and Ram Caravan FWD V6-201 3.3L
Sensor Functional Test
1992 Dodge and Ram Caravan FWD V6-201 3.3LSECTION Sensor Functional Test
Oxygen Sensor And Connector:
Caution: Use a high impedance [1] Digital Volt Ohm Meter (DVOM) only, when testing components on computerized vehicles, unless directed to do otherwise by a test procedure.
Caution: To avoid damaging O2 Sensor do not measure sensor resistance.
1. Run the engine at 2500 rpm for 3 minutes with the transmission in PARK (A/T) or NEUTRAL (M/T). (Make sure the vehicle is at normal operating temperature.)
2. Set the meter to read DC VOLTS, (not ohms).
3. With engine OFF, connect one lead of meter to engine ground. Disconnect the O2 sensor (HO2S) electrical connector and connect the other meter lead to the oxygen sensor signal wire (BK/DG wire).
4. Create a lean condition for 10 seconds. Voltage should decrease to 0.2 volt or less and remain there.
5. Create a rich condition for 10 seconds. Voltage should increase to 0.8 volt or more and remain there.
6. If sensor fails either test above, replace sensor.
7. Clear codes, and test operation.
Remarks:
[1] Minimum 10 Meg (10,000,000) ohm input impedance.
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.